Keyword: rfq
Paper Title Other Keywords Page
MO1AA01 Upgrades and Developments at the ISIS Linac linac, operation, MEBT, quadrupole 1
 
  • A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  
  The ISIS Spallation Neutron Source at the Rutherford Appleton Laboratory (RAL) in the UK has a 70 MeV H− linac operating at 202.5 MHz. The linac consists of a 665 keV RFQ and a 4-tank Drift Tube Linac (DTL). In order to ensure continued reliability, increase performance and lay the groundwork for possible facility upgrades in the future a programme of R&D has been taking place in recent years. This paper will discuss three components of that programme: the complete replacement of DTL Tank 4; the design of a Medium Energy beam Transport (MEBT) between the RFQ and DTL; and the Front End Test Stand (FETS), a demonstrator for the front end of a future high current, high energy linac.  
slides icon Slides MO1AA01 [26.001 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MO1AA01  
About • Received ※ 16 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 27 August 2022 — Issue date ※ 27 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MO1PA02 Beam Commissioning of Normal Conducting Part and Status of ESS Project MMI, linac, DTL, LEBT 18
 
  • R. Miyamoto, C. Amstutz, S. Armanet, R.A. Baron, E.C. Bergman, A.K. Bhattacharyya, B.E. Bolling, W. Borg, S. Calic, M. Carroll, J. Cereijo García, J. Christensson, J.D. Christie, H. Danared, C.S. Derrez, E.M. Donegani, S. Ekström, M. Eriksson, M. Eshraqi, J.F. Esteban Müller, K. Falkland, A. Forsat, S. Gabourin, A. Garcia Sosa, A.A. Gorzawski, V. Grishin, P.O. Gustavsson, S. Haghtalab, V.A. Harahap, H. Hassanzadegan, W. Hees, J.J. Jamróz, A. Jansson, M. Jensen, B. Jones, M. Juni Ferreira, M. Kalafatic, I. Kittelmann, H. Kocevar, S. Kövecses de Carvalho, E. Laface, B. Lagoguez, Y. Levinsen, M. Lindroos, A. Lundmark, M. Mansouri, C. Marrelli, C.A. Martins, J.P.S. Martins, S. Micic, N. Milas, M. Mohammednezhad, R. Montaño, M. Muñoz, G. Mörk, D.J.P. Nicosia, B. Nilsson, D. Noll, A. Nordt, T. Olsson, L. Page, D. Paulic, S. Pavinato, A. Petrushenko, D.C. Plostinar, J. Riegert, A. Rizzo, K.E. Rosengren, K. Rosquist, M. Serluca, T.J. Shea, A. Simelio, S. Slettebak, H. Spoelstra, A.M. Svensson, L. Svensson, R. Tarkeshian, L. Tchelidze, C.A. Thomas, E. Trachanas, K. Vestin, R.H. Zeng, P.L. van Velze, N. Öst
    ESS, Lund, Sweden
  • C. Baltador, L. Bellan, M. Comunian, F. Grespan, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • I. Bustinduy, A. Conde, D. Fernández-Cañoto, N. Garmendia, P.J. González, G. Harper, A. Kaftoosian, J. Martin, I. Mazkiaran, J.L. Muñoz, A.R. Páramo, S. Varnasseri, A.Z. Zugazaga
    ESS Bilbao, Zamudio, Spain
  • A.C. Chauveau, P. Hamel, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
  
  The European Spallation Source, currently under construction in Lund Sweden, will be a spallation neutron source driven by a superconducting proton linac with a design power of 5 MW. The linac features a high peak current of 62.5 mA and long pulse length of 2.86 ms with a repetition rate of 14 Hz. The normal conducting part of the linac has been undergoing beam commissioning in multiple steps, and the main focus of the beam commissioning has been on bringing systems into operation, including auxiliary ones. In 2022, beam was transported to the end of the first tank of the five-tank drift tube linac. This paper provides a summary of the beam commissioning activities at ESS and the current status of the linac.  
video icon
 
  please see instructions how to view/control embeded videos  
slides icon Slides MO1PA02 [18.907 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MO1PA02  
About • Received ※ 20 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 21 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MO1PA03 First Years of Linac4 RF Operation linac, operation, klystron, controls 25
 
  • S. Ramberger, R. Wegner
    CERN, Meyrin, Switzerland
  
  Following the construction, commissioning, run-in, and connection, in 2021 Linac4 at CERN saw its successful start-up to full operation. Being composed primarily of RF systems, occupying most of the tunnel and the equipment hall, a coordinated effort has been put in place by 4 RF teams providing cavities, amplifier chains, low-level RF and general control systems. While all parts came together with impressive performance from day one, many details required a considerable debugging effort to achieve the requested availability of at least 95% from first operation in the synchrotron complex. This talk will focus on issues in equipment reliability, radiation to electronics, thermal stability, systems interaction, as well as a few aspects of complex low-level RF setup. It will also discuss decisions taken with respect to spare policies and upgrades for the coming years.  
slides icon Slides MO1PA03 [3.992 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MO1PA03  
About • Received ※ 14 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 11 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOPA18 High Intensity Heavy Ion Beam Optimization at GSI UNILAC emittance, heavy-ion, brilliance, operation 110
 
  • H. Vormann, W.A. Barth, M. Miski-Oglu, U. Scheeler, M. Vossberg, S. Yaramyshev
    GSI, Darmstadt, Germany
  
  To improve the UNILAC’s performance for the upcoming use as heavy ion injector for the FAIR accelerator chain, dedicated beam investigations have been carried out. In particular measurements with Bismuth and Uranium beams require the highest accelerating voltages and powers of the rf cavities, the rf transmitters and the magnet power converters. After four years without Uranium operation (resp. with Uranium, but restricted cavity voltages), the UNILAC has now been operated again with a performance close to that of former years. Several upgrade measures will improve the UNILAC capability. In combination with the prototype pulsed gas stripper with hydrogen gas, beam intensities not far below the FAIR requirements can already now be expected.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOPA18  
About • Received ※ 24 August 2022 — Revised ※ 26 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 01 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOPA24 High-Brightness RFQ Injector for LANSCE Multi-Beam Operation emittance, quadrupole, operation, solenoid 130
 
  • Y.K. Batygin, D.A.D. Dimitrov, I. Draganić, D.V. Gorelov, E. Henestroza, S.S. Kurennoy
    LANL, Los Alamos, New Mexico, USA
  
  Funding: Work supported by US DOE under contract 89233218CNA000001
The unique feature of the LANSCE accelerator facility is multi beam operation. Accelerator delivers 100 MeV H+ and 800 MeV H− beams to five experimental areas. The LANSCE front end is equipped with two independent injectors for H+ and H− beams, merging at the entrance of a Drift Tube Linac (DTL). Existing Cockcroft-Walton (CW) - based injector provides conservation of high value of beams brightness before injection into DTL. To reduce long-term operational risks and support beam delivery with high reliability, we designed an RFQ-based front end as a modern injector replacement for the CW injectors. Proposed injector includes two independent low-energy transports merging beams at the entrance of a single RFQ, which accelerates simultaneously both protons and H− ions with multiple flavors of the beams. Paper discusses details of beam physics design and presents injector parameters. 		 
slides icon Slides MOPOPA24 [3.266 MB]  
poster icon Poster MOPOPA24 [5.806 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOPA24  
About • Received ※ 21 August 2022 — Revised ※ 26 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 01 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOGE01 Linac Design within HITRIplus for Particle Therapy linac, synchrotron, cavity, operation 134
 
  • U. Ratzinger, H. Höltermann, B. Koubek, H. Podlech
    BEVATECH, Frankfurt, Germany
  • M. Vretenar
    CERN, Meyrin, Switzerland
  
  Funding: EU Horizon 2020 Grant agreement No 101008548
Within the EU H2020 project HITRIplus for the development of cancer therapy with heavy ions a linac was designed. It is evolving from the concept of the 4 European cancer therapy centers applying light ions up to carbon. The new linac will in its simpliest version allow C4+ - beam injection into synchrotrons at 5 A MeV, with high beam transmission and allowing currents up to 5 mA alpha - particles. An advanced ECR - ion source will inject into an RFQ - IH-DTL combination. The DTL concept allows upgraded versions for A/q - values up to two and with beam energies of 7.1 A MeV from IH - tank2 and 10 A MeV from IH-tank3. The higher beam injection energies for light ions allow a relaxed synchrotron operation at lowest magnetic field levels. A main argument for the DTL extensions however is an additional linac function as radioisotope facility driver. The 7.1 A MeV are especially defined for the clean production of 211At, which may play a future role in cancer therapy. The linac will allow for high duty factors - up to 10%, to fulfil the needs for efficient radioisotope production. Solid state amplifiers with matched design RF power levels (up to 600 kW for IH3) will be used. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE01  
About • Received ※ 24 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 07 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOGE03 Design of a Linear Accelerator for Isotope Production DTL, linac, ECR, target 142
 
  • A. Pisent, C. Baltador, L. Bellan, M. Comunian, J. Esposito, L. Ferrari, A. Galatà, F. Grespan
    INFN/LNL, Legnaro (PD), Italy
  • L. Celona
    INFN/LNS, Catania, Italy
  • P. Mereu
    INFN-Torino, Torino, Italy
  
  The recent accelerator developments allow the design of very efficient linear accelerators for various applications. The possible use of concepts, components and developments well established or recently achieved in larger projects will be illustrated, with some examples related to isotope production for medical applications.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE03  
About • Received ※ 14 August 2022 — Revised ※ 16 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 05 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOGE08 Low Level RF System of the Light Proton Therapy Linac LLRF, linac, controls, cavity 161
 
  • D. Soriano Guillén, S. Benedetti, M. Cerv, G. De Michele, Ye. Ivanisenko
    AVO-ADAM, Meyrin, Switzerland
  
  The LIGHT (Linac for Image-Guided Hadron Therapy) project was initiated to develop a modular proton accelerator delivering beam with energies up to 230 MeV for cancer therapy. The machine consists of three different kinds of accelerating structures: RFQ (Radio-Frequency Quadrupole), SCDTL (Side Coupled Drift Tube Linac) and CCL (Coupled Cavity Linac). These accelerating structures operate at 750 MHz (RFQ) and 3 GHz (SCDTL, CCL). The accelerator RF signals are generated, distributed, and controlled by a Low-Level RF (LLRF) system. The LIGHT LLRF system is based on a commercially available solution from Instrumentation Technologies with project specific customization. This LLRF system features high amplitude and phase stability, monitoring of the RF signals from the RF network and the accelerating structures at 200 Hz, RF pulse shaping over real-time interface integrated, RF breakdown detection, and thermal resonance frequency correction feedback. The LLRF system control is integrated in a Front-End Controller (FEC) which connects it to the LIGHT control system. In this contribution we present the main features of the AVO LLRF system, its operation and performance.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE08  
About • Received ※ 16 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 05 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOGE09 Commissioning Status of the iBNCT Accelerator target, neutron, operation, radiation 164
 
  • M. Sato, Z. Fang, M.K. Fukuda, Y. Fukui, K. Futatsukawa, K. Ikegami, H. Kobayashi, C. Kubota, T. Kurihara, T. Miura, T. Miyajima, F. Naito, K. Nanmo, T. Obina, T. Shibata, T. Sugimura, A. Takagi
    KEK, Ibaraki, Japan
  • H. Kumada, Y. Matsumoto, Su. Tanaka
    Tsukuba University, Graduate School of Comprehensive Human Sciences, Ibaraki, Japan
  • N. Nagura, T. Ohba
    Nippon Advanced Technology Co., Ltd., Tokai, Japan
  • H. Oguri
    JAEA/J-PARC, Tokai-mura, Japan
  • T. Toyoshima
    ATOX, Ibaraki, Japan
  
  An accelerator-based boron neutron capture therapy (BNCT) has been studied intensively in recent years as one of the new cancer therapies after many clinical research with nuclear reactors. In the iBNCT project, the accelerator configuration consists of an RFQ and a DTL which have proven achievements in J-PARC. Meanwhile, a high duty factor is required to have a sufficient thermal neutron flux needed by BNCT treatments. After a failure of the klystron power supply occurred in Feb. 2019, beam operation was resumed in May 2020. To date, an average current of about 2 mA with the beam repetition rate of 75 Hz has been achieved with stable operation. Irradiation tests with cells and mice are ongoing together with characteristic measurements of the neutron beam. In parallel with that, we have been gradually improving the accelerator cooling-water system for further stability. In this contribution, the present status and prospects of the iBNCT accelerator are reported.  
slides icon Slides MOPOGE09 [0.852 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE09  
About • Received ※ 12 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 30 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOGE15 Operation of the H− Linac at FNAL linac, operation, quadrupole, diagnostics 184
 
  • K. Seiya, T.A. Butler, A. Hartman, D.C. Jones, V.V. Kapin, S. Moua, J.-F. Ostiguy, R. Ridgway, R.V. Sharankova, B.S. Stanzil, C.-Y. Tan, M.E. Wesley
    Fermilab, Batavia, Illinois, USA
  • M.W. Mwaniki
    IIT, Chicago, Illinois, USA
  
  The Fermi National Accelerator Laboratory (FNAL) Linac has been in operation for 52 years. the Linac delivers H− ions at 400 MeV and injects protons by charge exchange into the Booster synchrotron. Despite its age, the Linac is the most stable accelerator in the FNAL complex, reliably sending 22 mA in daily operations. We will discuss the status of the operation, beam studies, and plans.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE15  
About • Received ※ 16 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 11 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOGE18 Design of IH-DTL to Accelerate Intense Lithium-Ion Beam for Compact Neutron Source neutron, DTL, linac, ion-source 194
 
  • S. Ikeda, T. Kanesue, M. Okamura
    BNL, Upton, New York, USA
  
  We are studying feasibility of a compact neutron source with a lithium-ion beam driver. The neutron source com-prises a laser ion source, an RFQ linac, and an IH-DTL. Recently, we demonstrated 35-mA 7Li3+ ion beam acceler-ation by an RFQ linac with a laser ion source. Based on the result, we performed beam dynamic design of an IH-DTL to accelerate the lithium-ion beam to the energy required for the neutron production, 14 MeV. To obtain a realistic field distribution, we made a rough model of the IH-DTL cavity with Microwave studio. It was confirmed with GPT 3D beam simulation that 1.7-m and 200-kW IH-DTL with two triplets can accelerate 30-mA 7Li3+ beam.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOGE18  
About • Received ※ 02 September 2022 — Revised ※ 05 September 2022 — Accepted ※ 09 September 2022 — Issue date ※ 13 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPORI12 Development of Commercial RFQ Toward CW Applications cavity, MMI, operation, neutron 255
 
  • H. Yamauchi, M. Masuoka
    Time Corporation, Hiroshima, Japan
  
  TIME Co. developed a new 4-vane RFQ structure that can be used for a very high-duty factor operation. We eliminated the tuners to flatten the field distribution. The tuners increase RF contacts which may trigger unex-pected local heat spots and subsequent discharges. In addition, we hollowed out the entire vane to achieve large cooling water channels. A high-power test showed that the commissioning was completed within one day. We could input a nominal RF power without experienc-ing almost any discharge. The applied duty factor was 5 % at the 200 MHz resonant frequency, and the meas-ured frequency shift was not detected.
These activities have been carried out in collaboration with Tokyo Institute of Technology and RIKEN. 		 
slides icon Slides MOPORI12 [1.877 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPORI12  
About • Received ※ 26 August 2022 — Revised ※ 04 September 2022 — Accepted ※ 27 September 2022 — Issue date ※ 29 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TU2AA02 SPIRAL2 Final Commissioning Results MMI, linac, cavity, operation 314
 
  • A.K. Orduz, P.-E. Bernaudin, M. Di Giacomo, R. Ferdinand, B. Jacquot, O. Kamalou, J.-M. Lagniel, G. Normand, A. Savalle
    GANIL, Caen, France
  • D.U. Uriot
    CEA-DRF-IRFU, France
  
  The commissioning of SPIRAL2 was carried out in different steps and slots from 2014 to end 2021. In a first phase, the proton-deuteron and heavy ion sources, LEBT lines and RFQ were commissioned and validated with A/Q=1 up to 3 particles. The validation of the MEBT (between the RFQ and the linac, including the Single Bunch Selector), linac and HEBT lines (up to the beam dump and to the NFS experimental room) started on July 2019, when GANIL received the authorization to operate SPIRAL2. The linac tuning is now validated with H+, 4He2+ and D+ and nominal H+ and D+ beams were sent to NFS for physics experiments. The main results obtained during the commissioning stages and the strategy used by the commissioning team are presented.  
video icon
 
  please see instructions how to view/control embeded videos  
slides icon Slides TU2AA02 [3.724 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TU2AA02  
About • Received ※ 24 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TU2AA04 Commissioning of IFMIF Prototype Accelerator Towards CW Operation MMI, simulation, operation, linac 319
 
  • K. Masuda, T. Akagi, A. De Franco, T. Ebisawa, K. Hasegawa, K. Hirosawa, J. Hyun, T. Itagaki, A. Kasugai, K. Kondo, K. Kumagai, S. Kwon, A. Mizuno, Y. Shimosaki, M. Sugimoto
    QST Rokkasho, Aomori, Japan
  • T. Akagi, Y. Carin, F. Cismondi, A. De Franco, D. Gex, K. Hirosawa, K. Kumagai, S. Kwon, K. Masuda, I. Moya, F. Scantamburlo, M. Sugimoto
    IFMIF/EVEDA PT, Aomori, Japan
  • L. Antoniazzi, L. Bellan, M. Comunian, A. Facco, E. Fagotti, F. Grespan, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • F. Arranz, B. Brañas, J. Castellanos, D. Gavela, D. Jimenez-Rey, Á. Marchena, J. Mollá, P. Méndez, O. Nomen, C. Oliver, I. Podadera, D. Regidor, A. Ros, V. Villamayor, M. Weber, C. de la Morena
    CIEMAT, Madrid, Spain
  • N. Bazin, B. Bolzon, N. Chauvin, S. Chel, J. Marroncle
    CEA-IRFU, Gif-sur-Yvette, France
  • P. Cara, Y. Carin, F. Cismondi, G. Duglue, H. Dzitko, D. Gex, A. Jokinen, I. Moya, G. Phillips, F. Scantamburlo
    F4E, Germany
  • A. Mizuno
    JASRI/SPring-8, Hyogo-ken, Japan
  • Y. Shimosaki
    KEK, Ibaraki, Japan
  
  Construction and validation of the Linear IFMIF Prototype Accelerator (LIPAc) have been conducted under the framework of the IFMIF/EVEDA project. The LIPAc consists, in its final configuration, of a 100 keV injector and the world longest 5 MeV RFQ accelerator, followed by a MEBT with high space charged and beam loaded re-buncher cavities, an HWR-SRF linac, HEBT with a Diagnostic Plate, ending in a Beam Dump (BD) designed to stop the world highest deuteron current of 125 mA CW at 9 MeV. The beam commissioning at a low duty cycle of ~0.1 % led to a successful RFQ acceleration of 125 mA and 5 MeV beam in 2019. The following beam commissioning phase was initiated in July 2021 with a temporary transport line replacing the SRF linac. The major goals of this phase are to validate the RFQ, MEBT and BD performances up to CW and to characterize the beam properties in preparation to the final configuration with the SRF linac. This paper will present progresses made in this phase so far, such as a low-current and low-duty beam commissioning completed in Dec. 2021, CW operation campaign of the injector towards the nominal beam current, and RF conditioning of the RFQ towards CW.  
video icon
 
  please see instructions how to view/control embeded videos  
slides icon Slides TU2AA04 [6.731 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TU2AA04  
About • Received ※ 27 August 2022 — Revised ※ 31 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 08 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOJO01 Commissioning Plan of the IFMIF-DONES Accelerator MMI, linac, neutron, target 330
 
  • I. Podadera, A. Ibarra, M. Weber
    Consorcio IFMIF-DONES España, Granada, Spain
  • J. Aguilar, S. Becerril-Jarque, M. Luque, J. Maestre, D. Sánchez-Herranz, C. Torregrosa
    UGR, Granada, Spain
  • F. Arranz, M. García, A. Ibarra, D. Jimenez-Rey, J. Mollá, C. Oliver, I. Podadera, D. Regidor, M. Weber, C. de la Morena
    CIEMAT, Madrid, Spain
  • L. Bellan, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • D. Bernardi, G. Micciché, F.S. Nitti
    ENEA Brasimone, Centro Ricerche Brasimone, Camugnano, BO, Italy
  • B. Bolzon, N. Chauvin, S. Chel, A. Madur
    CEA-IRFU, Gif-sur-Yvette, France
  • P. Cara, G. Duglue
    Fusion for Energy, Garching, Germany
  • J. Castellanos
    Universidad de Castilla-La Mancha, Ciudad Real, Spain
  • T. Dézsi
    CER, Budapest, Hungary
  • M.J. Ferreira
    Lund University, Faculty of Engineering (LTH), Lund, Sweden
  • V. Hauer, Y.F. Qiu
    KIT, Eggenstein-Leopoldshafen, Germany
  • W. Królas, U. Wiacek
    IFJ-PAN, Kraków, Poland
  • T. Lehmann
    Karlsruher Institut für Technologie, Institut für Fördertechnik und Logistiksysteme, Karlsruhe, Germany
  • L. Macià, M. Sanmartí, B.K. Singh
    IREC, Sant Adria del Besos, Spain
  • C.A. Martins
    Lund University, Lund, Sweden
  • C. Prieto
    Empresarios Agrupados, Madrid, Spain
  
  Funding: Funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 - EUROfusion)
IFMIF-DONES (International Fusion Materials Irradiation Facility- DEMO-Oriented Neutron Early Source) - a powerful neutron irradiation facility for studies and certification of materials to be used in fusion reactors - is planned as part of the European roadmap to fusion electricity. Its main goal will be to characterize and to qualify materials under irradiation in a neutron field similar to the one faced in a fusion reactor. The intense neutron source is produced by impinging deuterons, from high-power linear deuteron accelerator, on a liquid lithium curtain. The facility has accomplished the preliminary design phase and is currently in its detailed design phase. At the present stage, it is important to have a clear understanding of how the commissioning of the facility will be performed, especially the commissioning of a 5 MW CW deuteron beam, together with the lithium curtain and the beam optimization for the neutron irradiation. In this contribution, the present plans for the hardware and beam commissioning of the accelerator will be given, focusing on the most critical aspects of the tiered approach and on the integration of the procedure with the lithium and tests systems. 		 
poster icon Poster TUPOJO01 [2.038 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO01  
About • Received ※ 24 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOJO02 Multi-Harmonic Buncher (MHB) Studies for Protons and Ions in ESS-Bilbao ISOL, bunching, proton, simulation 334
 
  • J.L. Muñoz, I. Bustinduy, P.J. González, L.C. Medina
    ESS Bilbao, Zamudio, Spain
  
  Multi-harmonic buncher cavities (MHB) are used in ion linacs to increase the bunch separation so the beam can be injected in rings or used in applications like time-of-flight experiments. The ideal saw-tooth electric field profile of the buncher is achieved in practice by adding several components of its Fourier expansion (multi-harmonics). ESS-Bilbao will develop* a MHB intended to be tested in the CERN-ISOLDE facility. The design and prototyping include the buncher device itself as well as the solid-state power amplifier (SSPA) to power it. The buncher design (finite elements and beam dynamics) has been carried out to optimize it for ISOLDE beams and frequencies of 1/10th of the radio-frequency quadrupole (RFQ) frequency. The testing of the cavity at ESS-Bilbao proton beam injector (before the RFQ) has also been studied.
* In the framework of the "Agreement for the Spanish Contribution to the Upgrade of the ATLAS, CMS, and LHCb Experiments and the new Projects for ISOLDE and nTOF" 		 
poster icon Poster TUPOJO02 [0.802 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO02  
About • Received ※ 22 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 04 September 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOJO03 Optimized Beam Optics Design of the MINERVA/MYRRHA Superconducting Proton Linac linac, cavity, target, diagnostics 337
 
  • U. Dorda, L. De Keukeleere
    SCK•CEN, Mol, Belgium
  • F. Bouly, E. Froidefond
    LPSC, Grenoble Cedex, France
  • E. Bouquerel, E.K. Traykov
    IPHC, Strasbourg Cedex 2, France
  • L. Perrot
    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
  
  The MYRRHA design for an accelerator driven system (ADS) is based on a 600 MeV superconducting proton linac. The first stage towards its realization is called MINERVA and was approved in 2018 to be constructed by SCK•CEN in Belgium. This 100 MeV linac, will serve as technology demonstrator for the high MYRRHA reliability requirements as well as driver for two independent target stations, one for radio-isotope research and production of radio-isotopes for medical purposes, the other one for fusion materials research. This contribution gives an overview of the latest accelerator machine physics design with a focus on the optimized medium (17 MeV) and high energy (100 MeV) beam transfer lines.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO03  
About • Received ※ 16 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOJO08 Upgrade and Commissioning of the 60 keV Low Energy Beam Transport Line for the Frankfurt Neutron Source FRANZ ion-source, proton, MMI, LEBT 352
 
  • H. Hähnel, A. Ateş, G. Blank, M.S. Breidt, D. Bänsch, R. Gössling, T. Metz, H. Podlech, U. Ratzinger, A. Rüffer, K. Volk, C. Wagner
    IAP, Frankfurt am Main, Germany
  • R.H. Hollinger, C. Zhang
    GSI, Darmstadt, Germany
  • H. Podlech
    HFHF, Frankfurt am Main, Germany
  
  The Low Energy Beam Transport line (LEBT) for the Frankfurt Neutron Source (FRANZ) has been redesigned to accommodate a 60 keV proton beam. Driven by a CHORDIS ion source, operating at 35 kV, a newly designed electrostatic postaccelerator has beeen installed to reach the desired beam energy of 60 keV. Additional upgrades to the beamline include two steerer pairs, several optical diagnostics sections and an additional faraday cup. We present the results of beam commissioning up to the point of RFQ injection. Emittance measurements were performed to prepare matching to the RFQ and improve the beam dynamics model of the low energy beamline. Due to the successful operation of the beamline at 60 keV, retrofitting of the RFQ for the new energy has been initiated.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO08  
About • Received ※ 22 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 05 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOJO10 Hardware Commissioning With Beam at the European Spallation Source: Ion Source to DTL1 MMI, DTL, ion-source, linac 360
 
  • B. Jones, R.A. Baron, C.S. Derrez, F. Grespan, V. Grishin, Y. Levinsen, N. Milas, R. Miyamoto, D.J.P. Nicosia, D. Noll, D.C. Plostinar, A.G. Sosa, E. Trachanas, R. Zeng
    ESS, Lund, Sweden
  • C. Baltador, L. Bellan, M. Comunian, F. Grespan, A. Palmieri
    INFN/LNL, Legnaro (PD), Italy
  • I. Bustinduy, N. Garmendia
    ESS Bilbao, Zamudio, Spain
  • L. Neri
    INFN/LNS, Catania, Italy
  
  The European Spallation Source (ESS) aims to build and commission a 2 MW proton linac ready for neutron production in 2025. The normal conducting section of the ESS linac is designed to accelerate a 62.5 mA proton beam to 90 MeV at 14 Hz. The section consists of a microwave ion source, Radio Frequency Quadrupole (RFQ) and 5-tank Drift Tube Linac (DTL). All sections are provided to ESS by in-kind partners across Europe. This paper reports the recent progress on the assembly, installation, testing and commissioning of the ESS normal conducting linac.  
slides icon Slides TUPOJO10 [2.397 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO10  
About • Received ※ 12 August 2022 — Revised ※ 15 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 03 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA03 Status and RF Devopments of ESS Bilbao RFQ klystron, operation, vacuum, coupling 410
 
  • N. Garmendia, I. Bustinduy, A. Conde, P.J. González, A. Kaftoosian, J. Martin, S. Masa, J.L. Muñoz, .A. Rodríguez Páramo
    ESS Bilbao, Zamudio, Spain
  
  Within the framework of the plans for study of a light-ion linear accelerator, ESS Bilbao is manufacturing a radio frequency quadrupole (RFQ) aimed at accelerating up to 3 MeV the protons generated in the ion source. The progress made and the difficulties encountered with the RFQ are discussed in this paper. A power coupler proto-type for the RFQ has been developed while several me-chanical constraints were also studied in the final cou-pler. This prototype operates at a lower power, then it can work using PEEK window for the vacuum interface and it does not require neither brazing nor cooling system. Also, a complete RF test stand is being implemented to perform the high-power conditioning in traveling and standing wave mode, to verify the power handling capa-bility of the coupler and its thermal behaviour. The RF test stand, based on EPICS environment, can provide up to 2 MW peak power at 352.2 MHz in a pulse operation of 14 Hz and a duty cycle of 4.9%.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA03  
About • Received ※ 09 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA04 First Beam Matching and Transmission Studies on the ESS RFQ LEBT, MMI, emittance, space-charge 414
 
  • D. Noll, R.A. Baron, C.S. Derrez, E.M. Donegani, M. Eshraqi, F. Grespan, H. Hassanzadegan, B. Jones, Y. Levinsen, N. Milas, R. Miyamoto, D.C. Plostinar, A.G. Sosa, R. Zeng
    ESS, Lund, Sweden
  • A.C. Chauveau, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
  
  The European Spallation Source will be driven by a 5 MW linear accelerator, producing 2.86 ms long proton beam pulses with a peak current of 62.5 mA at 14 Hz. Following the source commissioning in 2018 and 2019, the RFQ was successfully conditioned and subsequently commissioned with beam in 2021. In this paper, we will present results of studies on beam matching to the RFQ, both for low and high current beam modes, and will compare these results to model predictions.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA04  
About • Received ※ 26 August 2022 — Accepted ※ 05 September 2022 — Issue date ※ 05 September 2022  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA05 RFQ Performance During RF Conditioning and Beam Commissioning at ESS cavity, beam-loading, multipactoring, MMI 418
 
  • R. Zeng, G.S. Fedel, B. Jones, R. Miyamoto, D.J.P. Nicosia, D. Noll, A.G. Sosa, A.M. Svensson, E. Trachanas
    ESS, Lund, Sweden
  • M. Baudrier
    CEA-DRF-IRFU, France
  • A.C. Chauveau, M.J. Desmons, P. Hamel, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
  • F. Grespan
    INFN/LNL, Legnaro (PD), Italy
  
  RFQ at ESS has been successfully gone through RF conditioning, RF re-conditioning and low duty cycle beam commissioning. RFQ fulfills required functions and overall performance is satisfactory. RF conditioning, three RF re-conditionings after LEBT intervention and beam commissioning will be reported and RFQ performance during these periods will be described. RFQ performance in a large extent is reflected by dynamics and interactions between RF, cavity and beam. Thanks to advanced hardware capabilities and intelligent software intelligence, observation of those dynamics and interactions are done in detailed level. Analysis of those dynamics and interaction will be introduced. Some techniques to deal with challenges resulted from those dynamics and interactions will also be discussed.  
poster icon Poster TUPOPA05 [25.281 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA05  
About • Received ※ 18 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 05 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA09 RF Measurements and Tuning of the CERN 750 MHz ELISA-RFQ for Public Exhibition simulation, quadrupole, factory, proton 426
 
  • M. Marchi, A. Grudiev, S.J. Mathot, H.W. Pommerenke
    CERN, Meyrin, Switzerland
  
  Over the last few years CERN has successfully designed, built and commissioned the smallest RFQ to date, the one meter long PIXE-RFQ operating at 750 MHz. Its compactness offers a unique opportunity for education and public presentation of the accelerator community: A duplicate machine called ELISA-RFQ (Experimental Linac for Surface Analysis) will be exhibited in the Science Gateway, CERN’s upcoming scientific education and outreach center. It will allow the public to approach within a few centimeters a live proton beam injected into air, which is visible to the naked eye. The construction of the ELISA-RFQ has been completed in 2022. In this paper, we present the results of low-power RF measurements as well as field and frequency tuning.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA09  
About • Received ※ 14 August 2022 — Revised ※ 18 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 01 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA10 Beam Dynamics and RF Design Studies for the New RFQ for CERN Linac4 Upgrade linac, emittance, radio-frequency, quadrupole 430
 
  • H.W. Pommerenke, G. Bellodi, A. Grudiev, S. Kumar, A.M. Lombardi
    CERN, Meyrin, Switzerland
  
  The 352 MHz Linac4-RFQ is the first rf accelerating structure of the CERN accelerator complex, accelerating an H− beam to 3 MeV. After successful commissioning in 2013, superficial vane damage has been observed in 2020. In view that the RFQ is a single point of failure, in parallel to the production of a near identical spare (RFQ2), design studies on a longer-term upgrade have been launched: Linac4-RFQ3. Main goals are to achieve a design with higher beam acceptance, reduced beam losses, and reduced RF breakdown rate. Two versions of RFQ are under study: a conventional RFQ built by brazing copper, as well as an RFQ with titanium vane tips (brazed on copper). High-gradient experiments suggest that titanium vane tips support higher surface fields compared to copper, up to 40 MV/m, and are more resistant against beam irradiation. In this paper, we present beam dynamics and rfdesign of both variants of RFQ3.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA10  
About • Received ※ 12 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA11 Compact Proton Accelerator in UHF Band At KAHVELab cavity, proton, vacuum, quadrupole 434
 
  • S. Esen, A. Adiguzel, O. Kocer, S. Oz
    Istanbul University, Istanbul, Turkey
  • A. Caglar
    YTU, Istanbul, Turkey
  • E. Celebi, E.V. Ozcan
    Bogazici University, Bebek / Istanbul, Turkey
  • E. Celebi
    IBU, Istanbul, Turkey
  • A.K. Karatay, F. Yaman, Ö.H. Yilmaz
    IZTECH, Izmir, Turkey
  • U. Kaya
    Istinye University, Institute of Sciences, Istanbul, Turkey
  • A. Kilicgedik
    Marmara University, Istanbul, Turkey
  • G. Türemen
    Turkish Atomic Energy Authority, Ankara, Turkey
  • G. Unel
    UCI, Irvine, California, USA
  
  Funding: This project are supported by TUBITAK Project no: 118E838
Proton Test Beam at KahveLAB (Kandilli Detector, Accelerator and Instrumentation Laboratory) project aims to design and produce a radio frequency quadrupole (RFQ) operating at 800 MHz in Istanbul, Turkey using the local resources. The beamline consists of a proton source, a low energy beam transport (LEBT) line including the beam diagnostic section, and the RFQ cavity itself. This RFQ is a 4-vane, 1-meter-long cavity to accelerate the 20 keV beam extracted from the plasma ion source to 2 MeV. Its engineering prototype is already produced and subjected to mechanical, low-power RF, and vacuum tests. In this poster, the results of the first test production, especially the bead-pull test setup will be discussed. 		 
poster icon Poster TUPOPA11 [16.128 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA11  
About • Received ※ 21 August 2022 — Revised ※ 22 August 2022 — Accepted ※ 12 September 2022 — Issue date ※ 26 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA12 RF Measurements and Tuning of the Test Module of 800 MHz Radio-Frequency Quadrupole proton, quadrupole, radio-frequency, simulation 438
 
  • A. Kilicgedik
    Marmara University, Istanbul, Turkey
  • A. Adiguzel, S. Esen
    Istanbul University, Istanbul, Turkey
  • B. Baran
    Ankara University, Faculty of Sciences, Ankara, Turkey
  • A. Caglar
    YTU, Istanbul, Turkey
  • E. Celebi, E.V. Ozcan
    Bogazici University, Bebek / Istanbul, Turkey
  • U. Kaya
    Istinye University, Institute of Sciences, Istanbul, Turkey
  • G. Türemen
    TENMAK-NUKEN, Ankara, Turkey
  • G. Unel
    UCI, Irvine, California, USA
  • F. Yaman
    IZTECH, Izmir, Turkey
  
  Funding: This project are supported by The Scientific and Technological Research Council of Turkey (TUBITAK) Project no: 118E838
The 800 MHz RFQ (radio-frequency quadrupole), developed and built at KAHVElab (Kandilli Detector, Accelerator and Instrumentation Laboratory) at Bogazici University in Istanbul, Turkey, has been designed to provide protons that have an energy of 2 MeV within only 1 m length. The RFQ consists of two modules and the test module of RFQ was constructed. The algorithm developed by CERN, based on the measurements generated by the tuner settings estimated through the response matrix [1,2,3], has been optimized for a single module and 16 tuners. The desired field consistent with the simulation was obtained by bead pull measurements. In this study, we present low-power rf measurements and field tuning of the test module.
[1] Koubek, B., et al., PHY. REV. ACC. AND BEAMS 20,08010(2017)
[2] Koubek, B., et al., CERN-2017-0006,(2017)
[3] Pommerenke, Hermann W., et al., Nuc. Inst. and Meth. in Phy. Res. Sec.A),165564(2021) 		 
poster icon Poster TUPOPA12 [1.699 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA12  
About • Received ※ 24 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA13 Pulsed DC High Field Measurements of Irradiated and Non-Irradiated Electrodes of Different Materials radiation, cathode, vacuum, linac 441
 
  • R.C. Peacock, G. Burt
    Lancaster University, Lancaster, United Kingdom
  • G. Bellodi, S. Calatroni, C.F. Da Palma Serafim, A. Grudiev, A.M. Lombardi, A.T. Perez Fontenla, S. Ramberger, E. Sargsyan, S. Sgobba, W. Wuensch
    CERN, Meyrin, Switzerland
  
  Beam loss occurs in Radio Frequency Quadrupoles (RFQ), and has been observed in the H− linear accelerator Linac4 (L4) at CERN. To determine if beam loss can induce breakdowns, and to compare the robustness of different materials, tests have been done using pulsed high-voltage DC systems. Electrical breakdown phenomena and conditioning processes have been studied using these systems. Cathodes of different materials were irradiated with 1.2x1019 H− p/cm2, the estimated beam loss of the L4 RFQ over 10 days. The irradiated electrodes were installed in a system to observe if the irradiated area coincided with the breakdown locations, with pulsing parameters similar to the RFQ. Tests of irradiated and non-irradiated electrodes of the same material were done for comparison. The main difference observed was an increase in the number of breakdowns during the initial conditioning that returned to non-irradiated sample values with further running. Visual observations after irradiation show the beam centre and a halo the same diameter of the beam pipe. Breakdown clusters occur in the centre and halo regions, suggesting irradiation is not the only factor determining the breakdown probability.  
poster icon Poster TUPOPA13 [3.845 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA13  
About • Received ※ 23 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 07 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOPA29 Design Enhancements for the SNS RFQ Coaxial Coupler coupling, simulation, multipactoring, operation 469
 
  • G.D. Toby, C.N. Barbier, Y.W. Kang, S.W. Lee, J.S. Moss
    ORNL, Oak Ridge, Tennessee, USA
  • A.H. Narayan
    ORNL RAD, Oak Ridge, Tennessee, USA
  
  Funding: ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. This research was supported by the DOE Office of Science, Basic Energy Science.
The H− ion linear accelerator at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory operates with reliability that routinely surpasses 90% during scheduled beam operation. With the ambitious goal of eventually achieving at least 95% availability, several upgrade and improvement projects are ongoing. One such project is the modification of the coaxial couplers that transfer radio frequency (RF) power to the accelerator’s Radio Frequency Quadrupole (RFQ). The proposed modification utilizes stub sections and capacitive coupling to construct a physically separable assembly with DC isolation. With a separated coupler assembly, the section that includes the magnetic coupling loop can be permanently mounted to the RFQ which would eliminate the need to re-adjust the couplers after maintenance activities, upgrades, and repairs. Additionally, the modified design would provide increased multipaction suppression with DC biasing and potentially lower thermal gradients across the device. This paper presents the design and simulation results of the project. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA29  
About • Received ※ 23 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 01 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOGE20 Observation of Current-Driven Features of 2.5 Mev Ion Bunch With Complete and Efficient 5D Measurements at the SNS Beam Test Facility quadrupole, dipole, space-charge, simulation 541
 
  • K.J. Ruisard, A.V. Aleksandrov, S.M. Cousineau, A.M. Hoover, A.P. Zhukov
    ORNL, Oak Ridge, Tennessee, USA
  
  Funding: Work supported by U.S. Department of Energy, Office of Science, High Energy Physics. Authored by UT- Battelle, LLC under DOE Contract No. DE-AC05-00OR22725.
The SNS Beam Test Facility research program is focused detailed studies of beam distributions for medium-energy ion beams, with the goal of reconstructing realistic 6D bunch distributions to enable halo prediction. For complete characterization of the initial distribution, scan time scales exponentially with scan dimension. Currently, a full 6D measurement with ~10 points across most dimensions requires 30 hours. However, measurement of the 5D distribution f(x, x’,y,y’,w) can be done very rapidly using a hybrid slit/screen method. This approach requires ~4 hours to obtain at least 32 points/dimension, with very high resolution (0.5 keV) in the energy distribution. This presentation reports on the approach and results for 5D characterization of the initial RFQ-formed bunch. This includes higher-resolution views of previously reported transverse-longitudinal dependence and additional interplane dependencies that were not previously reported. 		 
slides icon Slides TUPOGE20 [1.230 MB]  
poster icon Poster TUPOGE20 [1.406 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOGE20  
About • Received ※ 25 August 2022 — Revised ※ 30 August 2022 — Accepted ※ 04 September 2022 — Issue date ※ 16 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI03 Model Coupled Accelerator Tuning With an Envelope Code simulation, ISAC, quadrupole, linac 549
 
  • O. Shelbaya, R.A. Baartman, O.K. Kester, S. Kiy, S.D. Rädel
    TRIUMF, Vancouver, Canada
  
  Funding: National Research Council Canada
Frequent linac re-tuning is needed at TRIUMF-ISAC for the delivery of rare isotope beams at a variety of mass-to-charge ratios and beam energies. This operation is of appreciable complexity due to the nature of the accelerator, consisting of a separated function, variable output energy DTL paired with an RFQ. Reference tunes, computed from a variety of beam and accelerator simulation codes, are scaled according to the beam properties, though changing beam parameters at the sources requires manual tuning of matching section quadrupoles. Using an end-to-end envelope model of the machine in the code TRANSOPTR, these tunes can now be rapidly computed, and using beam diagnostic inputs to reconstruct the beam matrix, the model can be used to dynamically re-optimize the machine tune on-line. 		 
poster icon Poster TUPORI03 [1.257 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI03  
About • Received ※ 13 August 2022 — Revised ※ 23 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 02 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI06 Harmonic Bunch Formation and Optional RFQ Injection emittance, space-charge, injection, cavity 559
 
  • E. Sunar, U. Ratzinger, M. Syha, R. Tiede
    IAP, Frankfurt am Main, Germany
  
  With the aim of reduced beam emittances, a pre-bunching concept into an RFQ or a DTL has been developed. The structure has been designed by using a two harmonics double drift buncher which consists of two bunchers: the first one is driven by a fundamental frequency whereas the other is ex- cited with the second harmonic including a drift in between. This well-known "Harmonic Double-Drift-Buncher" is rein- vestigated under space charge conditions for RFQ, cyclotron, and for direct DTL-injection. There are significant benefits for this design such as to catch as many particles as possible from a dc beam into the longitudinal linac acceptance, or to reduce/optimize by up to an order of magnitude the lon- gitudinal emittance for low and medium beam currents. In accordance to these advantages, a new multi-particle track- ing beam dynamics code has been developed which is called "Bunch Creation from a DC beam - BCDC". In this paper we present this new code and some stimulating examples.  
poster icon Poster TUPORI06 [28.234 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI06  
About • Received ※ 14 August 2022 — Revised ※ 24 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 05 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI17 Emittance Measurement from the Proton Testbeam at KAHVELab emittance, LEBT, simulation, proton 581
 
  • D. Halis
    YTU, Istanbul, Turkey
  • S. Aciksoz, E.V. Ozcan
    Bogazici University, Bebek / Istanbul, Turkey
  • A. Adiguzel, S. Esen, S. Oz
    Istanbul University, Istanbul, Turkey
  • H. Cetinkaya
    Dumlupinar University, Faculty of Science and Arts, Kutahya, Turkey
  • T.B. Ilhan
    Bogaziçi University, Kandilli Accelerator, Istanbul, Turkey
  • A. Kilicgedik
    Marmara University, Istanbul, Turkey
  • S. Ogur
    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
  • G. Unel
    UCI, Irvine, California, USA
  
  Funding: This study is supported by Istanbul University Scientific Research Commission Project ID 33250 and TUBITAK Project no : 119M774.
A testbeam using a Radio Frequency Quadrupole (RFQ) operating at 800 MHz, to accelerate a 1.5mA proton beam to 2MeV energy has been designed, manufactured and is currently being commissioned at KAHVELab, Istanbul. The beam from the microwave discharge ion source (IS) must be matched to the RFQ via an optimized Low Energy Beam Transport (LEBT) line. The LEBT line consists of two solenoid magnets, two stereer magnets and a beam diagnostics station named MBOX. All the beamline components are locally designed, simulated, manufactured and tested with local resources. The MBOX should be able to measure the beam current and profile, as well as the beam emittance, to ensure an accurate match between IS and RFQ. It includes a number of diagnostic tools: a Faraday Cup, a scintillator screen, and a pepper pot plate (PP). An analysis software is developed and tested for the PP photo analysis. This contribution will present the proton beamline components and will focus on the MBOX measurements, especially on the PP emittance analysis. 		 
poster icon Poster TUPORI17 [5.641 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI17  
About • Received ※ 23 August 2022 — Revised ※ 09 September 2022 — Accepted ※ 26 September 2022 — Issue date ※ 29 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI23 Investigation of the Beam Propagation Through the FNAL LEBT LEBT, ion-source, linac, emittance 597
 
  • D.C. Jones, D.S. Bollinger, V.V. Kapin, K. Seiya
    Fermilab, Batavia, Illinois, USA
  
  Fermilab Preaccelerator sends 25 mA H− beam with a 30 µs pulse length at 15 Hz. The machine’s uptime was increased in 2012 by the replacement of the Cockcroft Walton accelerator with an RFQ system to take the beam from 35 keV to 750 keV; however, this came with a reduction in transmitted beam between the source and the entrance to Tank 1 of the LINAC. Fermilab currently operates with less than 50% of the beam current from the ion source making it to the entrance of tank 1. In an effort to understand the causes of this reduction in transmission efficiency a vertically movable paddle was installed between the first two solenoids allowing the beam size to be investigated before entering the RFQ. Comparing this data to the emittance measurements done after the first solenoid in the Ion Source R&D lab a more complete picture of the beams propagation through the LEBT has begun to be established when compared with the simulation results. We will present these results here.  
poster icon Poster TUPORI23 [0.510 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI23  
About • Received ※ 14 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI24 Beam Dynamics Studies at the PIP-II Injector Test Facility MEBT, cryomodule, emittance, solenoid 601
 
  • J.-P. Carneiro, B.M. Hanna, E. Pozdeyev, L.R. Prost, A. Saini, A.V. Shemyakin
    Fermilab, Batavia, Illinois, USA
  
  A series of beam dynamic studies were performed in 2020-2021 at the PIP-II Injector Test Facility (PIP2IT) that has been built to validate the concept of the front-end of the PIP-II linac being constructed at Fermilab. PIP2IT is comprised of a 30-keV H− ion source, a 2 m-long Low Energy Beam Transport (LEBT), a 2.1- MeV CW RFQ, followed by a 10-m Medium Energy Beam Transport (MEBT), 2 cryomodules accelerating the beam to 16 MeV and a High-Energy Beam Transport (HEBT) bringing the beam to an absorber. This paper presents beam dynamics - related measurements performed at PIP2IT as the Twiss parameters with Allison scanners, beam envelopes along the injector, and transverse and longitudinal rms emittance reconstruction. These measurements are compared with predictions from the beam dynamics code Tracewin.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI24  
About • Received ※ 21 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI28 Injector System Development for 1 MeV/n RFQ at KOMAC ion-source, proton, extraction, solenoid 615
 
  • H.S. Kim
    KAERI, Daejon, Republic of Korea
  • J.J. Dang, D.-H. Kim, H.-J. Kwon, S. Lee, S.P. Yun
    KOMAC, KAERI, Gyeongju, Republic of Korea
  
  Funding: This work has been supported through the KOMAC operation fund of KAERI by the Korean government (MSIT).
A Radiofrequency quadrupole (RFQ) system with 200 MHz frequency and 1 MeV/n output energy is under development at KOMAC (Korea Multi-purpose Accelerator Complex) for multiple purposes such as a test-stand for an ion source and low energy beam transport study, ion beam implantation for semiconductors and polymers and neutron generation for material study. We developed an injector system for the RFQ, which is mainly composed of a 2.45 GHz microwave ion source, low energy beam transport with two solenoids, and a vacuum system with a diagnostic chamber. The RFQ was designed to be able to accelerate the beam with 2.5 mass-to-charge ratios (A/q) but we used the proton beam for an initial test to characterize the injector system. A Detailed describtion of the constructed injector system along with test results will be given in this paper. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI28  
About • Received ※ 22 August 2022 — Revised ※ 26 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPORI29 Space Charge and Electron Confinement in High Current Low Energy Transport Lines: Experience and Simulations From IFMIF/EVEDA and ESS Commissioning electron, LEBT, extraction, ion-source 618
 
  • L. Bellan, M. Comunian, F. Grespan, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • E.M. Donegani, M. Eshraqi, F. Grespan, B. Jones, E. Laface, Y. Levinsen, N. Milas, R. Miyamoto, D. Noll, D.C. Plostinar, A.G. Sosa
    ESS, Lund, Sweden
  • L. Neri
    INFN/LNS, Catania, Italy
  
  The mechanism of space charge compensation given by the residual gas ionization is a key factor for the emittance containment in the low energy beam transport (LEBT) lines of high intensity hadron injectors. A typical front end including a microwave Ion source, a LEBT and Radio Frequency Quadrupole (RFQ), is equipped with two repellers at each interface to prevent electrons from flowing back, to the source, or forward, to the RFQ. In this paper we will emphasize the importance of the ion Source and LEBT repellers on giving the appropriate boundary conditions for the space-charge compensation building-up mechanism. The theory and simulations are supported by experiments performed in the high intensity facility such as ESS and IFMIF/EVEDA.  
slides icon Slides TUPORI29 [1.633 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI29  
About • Received ※ 23 August 2022 — Revised ※ 03 September 2022 — Accepted ※ 06 September 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WE1AA05 The Muon Linac Project at J-PARC linac, DTL, acceleration, experiment 636
 
  • Y. Kondo, Y. Fuwa, R. Kitamura, K. Moriya, T. Takayanagi
    JAEA/J-PARC, Tokai-mura, Japan
  • S. Bae, H. Choi, S. Choi, B. Kim, H.S. Ko
    SNU, Seoul, Republic of Korea
  • E. Cicek, H. Ego, Y. Fukao, K. Futatsukawa, N. Kawamura, T. Mibe, Y. Miyake, S. Mizobata, M. Otani, N. Saito, K. Shimomura, T. Yamazaki, M. Yoshida
    KEK, Ibaraki, Japan
  • K. Hasegawa
    QST Rokkasho, Aomori, Japan
  • N. Hayashizaki
    Research Laboratory for Nuclear Research, Tokyo Institute of Technology, Tokyo, Japan
  • T. Iijima, Y. Sue, K. Sumi
    Nagoya University, Graduate School of Science, Chikusa-ku, Nagoya, Japan
  • H. Iinuma, Y. Nakazawa
    Ibaraki University, Ibaraki, Japan
  • K. Inami, K. Suzuki, M. Yotsuzuka
    Nagoya University, Nagoya, Japan
  • K. Ishida
    RIKEN Nishina Center, Wako, Japan
  • Y. Iwashita
    Kyoto ICR, Uji, Kyoto, Japan
  • T. Morishita
    JAEA/LINAC, Ibaraki-ken, Japan
  • G.P. Razuvaev
    Budker INP & NSU, Novosibirsk, Russia
  • Y. Takeuchi, J. Tojo
    Kyushu University, Fukuoka, Japan
  • E. Won
    Korea University, Seoul, Republic of Korea
  • H.Y. Yasuda
    University of Tokyo, Tokyo, Japan
  
  The muon linac project for the precise measurement of the muon anomalous magnetic and electric dipole moments, which is currently one of the hottest issues of the elementary particle physics, is in progress at J-PARC. The muons from the J-PARC muon facility are once cooled to room temperature, then accelerated up to 212 MeV with a normalized emittance of 1.5 pi mm mrad and a momentum spread of 0.1%. Four types of accelerating structures are adopted to obtain the efficient acceleration with a wide beta range from 0.01 to 0.94. The project is moving into the construction phase. They already demonstrated the re-acceleration scheme of the decelerated muons using a 324-MHz RFQ in 2017. The high-power test of the 324-MHz Interdigital H-mode (IH) DTL using a prototype cavity will be performed in 2021. The fabrication of the first module of 14 modules of the 1296-MHz Disk and Washer (DAW) CCL will be done to confirm the production process. Moreover, the final design of the travelling wave accelerating structure for the high beta region is also proceeding. In this presentation, the recent progress toward the realization of the world first muon linac will be presented.  
video icon
 
  please see instructions how to view/control embeded videos  
slides icon Slides WE1AA05 [3.764 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-WE1AA05  
About • Received ※ 14 August 2022 — Revised ※ 21 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 16 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPOPA19 Initial High Power RF Driving Test Using Digital LLRF for RF Conditioning of 1 MeV/n RFQ at KOMAC LLRF, controls, cavity, experiment 781
 
  • H.S. Jeong, W.-H. Jung, D.-H. Kim, H.S. Kim, J.H. Kim, K.H. Kim, S.G. Kim, H.-J. Kwon, P. Lee, Y.G. Song
    KOMAC, KAERI, Gyeongju, Republic of Korea
  
  Funding: This work was supported through the KOMAC operation fund by the Ministry of Science and ICT of Korean government.
As a part of R&D toward the RFQ based heavy ion irradiation system, the 1 MeV/n RFQ was designed, brazed, installed and commissioned by staff researchers and engineers at KOMAC of KAERI. This 1 MeV/n RFQ system includes the microwave ion source, EBIS, RFQ, quadrupole magnets, switching magnet and the target systems. The digital based Low-Level RF was developed to provide the stable accelerating field to the RFQ. This Low-Level RF has features such as direct RF detection/generation without mixer, non-IQ sampling, PI feedback control, iterative learning based feed-forward control, and the digital RF interlock. In this paper, the characteristics of Low-Level RF are described, as well as the processes and results of an initial RF driving test for the RFQ’s RF conditioning. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPOPA19  
About • Received ※ 22 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
FR1AA04 SARAF Commissioning: Injector, MEBT and Chopper MEBT, emittance, diagnostics, MMI 872
 
  • J. Dumas, D. Chirpaz, D. Darde, J. Dumas, R.D. Duperrier, G. Ferrand, A. Gaget, F. Gohier, F. Gougnaud, T.J. Joannem, V. Nadot, N. Pichoff, F. Senée, C. Simon, D.U. Uriot, L. Zhao
    CEA-IRFU, Gif-sur-Yvette, France
  • A. Chancé
    CEA, Gif-sur-Yvette, France
  • S. Cohen, I.G. Gertz, N. Goldberger, H. Isakov, B. Kaizer, A. Kreisel, J. Luner, I. Mardor, H. Paami, A. Perry, I. Polikarpov, E. Reinfeld, J. Rodnitsky, I. Shmuely, A. Shor, Y. Solomon, N. Tamim, R. Weiss-Babai, L. Weissman, T. Zchut
    Soreq NRC, Yavne, Israel
  • G. Desmarchelier, N. Solenne
    CEA-DRF-IRFU, France
  
  IAEC/SNRC (Israel) is constructing an accelerator fa-cility, SARAF, for neutron production. It is based on a linac accelerating 5 mA CW deuteron and proton beam up to 40 MeV. As a first phase, IAEC constructed and operated a linac (SARAF Phase I), from which remains an ECR ion source, a Low-Energy Beam Transport (LEBT) line and a 4-rod RFQ. Since 2015, IAEC and CEA (France) are collaborating in the second phase, consisting in manufacturing of the linac (Figure 1). The injector control-system has been recently updated and the Medium Energy Beam Transport (MEBT) line has been installed and integrated to the infrastructure. It has been partially commissioned during the first semester of 2022. This paper presents the results of the integration, tests and commissioning of the injector and MEBT, be-fore delivery of the cryomodules.  
video icon
 
  please see instructions how to view/control embeded videos  
slides icon Slides FR1AA04 [2.971 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-FR1AA04  
About • Received ※ 21 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 14 September 2022 — Issue date ※ 15 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
FR1AA05 Design Considerations for a Proton Linac for a Compact Accelerator Based Neutron Source DTL, MEBT, emittance, neutron 878
 
  • M. Abbaslou
    UVIC, Victoria, Canada
  • A. Gottberg, O.K. Kester, R.E. Laxdal, M. Marchetto
    TRIUMF, Vancouver, Canada
  • D.D. Maharaj, D. Marquardt
    University of Windsor, Windsor, Ontario, Canada
  • S. Tabbassum
    Purdue University, West Lafayette, Indiana, USA
  
  New neutron sources are needed both for Canada and internationally as access to reactor based neutrons shrinks. Compact Accelerator-based Neutron Sources (CANS) offer the possibility of an intense source of pulsed neutrons with a capital cost significantly lower than spallation sources. In an effort to close the neutron gap in Canada a prototype, Canadian compact accelerator-based neutron source (PC-CANS) is proposed for installation at the University of Windsor. The PC-CANS is envisaged to serve two neutron science instruments, a boron neutron capture therapy (BNCT) station and a beamline for fluorine-18 radioisotope production for positron emission tomography (PET). To serve these diverse applications of neutron beams, a linear accelerator solution is selected, that will provide 10 MeV protons with a peak current of 10 mA within a 5% duty cycle. The accelerator is based on an RFQ and DTL with a post-DTL pulsed kicker system to simultaneously deliver macro-pulses to each end-station. Several choices of Linac technology are being considered and a comparison of the choices will be presented.  
video icon
 
  please see instructions how to view/control embeded videos  
slides icon Slides FR1AA05 [1.945 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-FR1AA05  
About • Received ※ 27 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 03 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)