TUPOJO —  Poster Session   (30-Aug-22   16:00—18:00)
Paper Title Page
TUPOJO01 Commissioning Plan of the IFMIF-DONES Accelerator 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 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
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TUPOJO03 Optimized Beam Optics Design of the MINERVA/MYRRHA Superconducting Proton Linac 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
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TUPOJO04 R&D for the Realization of a Very High Frequency Crossbar H-Mode Drift Tube Linac 341
 
  • M. Heilmann, C. Zhang
    GSI, Darmstadt, Germany
  • H. Podlech
    IAP, Frankfurt am Main, Germany
 
  A 704.4 MHz Crossbar H-mode (CH) drift tube linac has been proposed for performing a radio frequency jump at ß = 0.2. Up to now, the highest frequency of the constructed CH cavities is 360 MHz. Simulations have shown that the operation frequency for an H210-mode cavity can be up to ~800 MHz. At 704.4 MHz, the cavity dimensions become small, which bring challenges for many practical problems e.g. construction, vacuum pumping and RF coupling. This paper presents the performed R&D studies for the realization of such a very high frequency cavity.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO04  
About • Received ※ 14 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 31 August 2022
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TUPOJO05 Welding and Copper Plating Investigations on the FAIR Proton Linac 345
 
  • A. Seibel, T. Dettinger, C.M. Kleffnerpresenter, K. Knie, C. Will
    GSI, Darmstadt, Germany
  • M.S. Breidt, H. Hähnel, U. Ratzinger
    IAP, Frankfurt am Main, Germany
  • J. Egly
    PINK GmbH Vakuumtechnik, Wertheim, Germany
 
  A FAIR injector linac for the future FAIR facility is under construction. In order to meet the requirements for copper plating of the CH-cavities, a variety of tests with dummy cavities has been per-formed and compared to simulation. Further dummy cavities have been produced in order to improve the welding techniques. In addition, the results on 3d-printed stems with drift tubes will be presented.  
poster icon Poster TUPOJO05 [2.863 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO05  
About • Received ※ 08 August 2022 — Revised ※ 14 August 2022 — Accepted ※ 24 August 2022 — Issue date ※ 15 September 2022
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TUPOJO06 Design and Test of Beam Diagnostics Equipment for the FAIR Proton Linac 348
 
  • T. Sieber, P. Forck, C.M. Kleffner, S. Udrea
    GSI, Darmstadt, Germany
  • I. Bustinduy, Á. Rodríguez Páramo
    ESS Bilbao, Zamudio, Spain
  • J. Herranz
    Proactive Research and Development, Sabadell, Spain
  • A. Navarro Fernandez
    CERN, Meyrin, Switzerland
 
  A dedicated proton injector Linac (pLinac) for the Facility of Antiproton and Ion Research (FAIR) at GSI, Darmstadt, is currently under construction. It will pro-vide a 68 MeV, up to 70 mA proton beam at a duty cycle of max. 35µs / 4 Hz for the SIS18 synchrotron, using the UNILAC transfer beamline. After further acceleration in SIS100, the protons are mainly used for antiproton production at the Antiproton Annihilation Darmstadt (PANDA) experiment. The Linac will operate at 325 MHz and consists of a novel so called ’Ladder’ RFQ type, followed by a chain of CH-cavities, partially coupled by rf-coupling cells. In this paper we present the beam diagnostics system for the pLinac with special emphasis on the Secondary Electron Emission (SEM) Grids and the Beam Position Monitor (BPM) system. We also describe design and status of our diagnostics testbench for stepwise Linac commissioning, which includes an energy spectrometer with associated optical system. The BPMs and SEM grids have been tested with proton and argon beam during several beamtimes in 2022. The results of these experiments are presented.  
poster icon Poster TUPOJO06 [3.264 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO06  
About • Received ※ 24 August 2022 — Revised ※ 01 September 2022 — Accepted ※ 02 September 2022 — Issue date ※ 07 September 2022
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TUPOJO08 Upgrade and Commissioning of the 60 keV Low Energy Beam Transport Line for the Frankfurt Neutron Source FRANZ 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
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TUPOJO09 High Power RF Conditioning of the ESS DTL1 356
 
  • F. Grespan, C. Baltador, L. Bellan, D. Bortolato, M. Comunian, E. Fagotti, M.G. Giacchini, M. Montis, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • F. Grespan, B. Jones, L. Page, A.G. Sosa, E. Trachanas, R. Zeng
    ESS, Lund, Sweden
  • D.J.P. Nicosia
    CERN, Meyrin, Switzerland
 
  The first tank of Drift Tube Linac (DTL) for the European Spallation Source ERIC (ESS), delivered by INFN, has been installed in the ESS tunnel in Summer 2021. The DTL-1 is designed to accelerate a 62.5 mA proton beam from 3.62 MeV up to 21 MeV. It consists of 61 accelerating gaps, alternate with 60 drift tubes equipped with Permanent Magnet Quadrupole (PMQ) in a FODO lattice. The remaining drift tubes are equipped with dipole correctors (steerers), beam position monitors (BPMs) or empty. The total length of the cavity is 7.6 m and it is stabilized by post couplers. Two waveguide couplers feed the DTL with the 2.2 MW of RF power required for beam operation, equally divided by RF power losses and beam power. This paper first presents the main systems required for the DTL conditioning. Then it summarizes the main steps and results of this high power RF conditioning done at ESS to prepare the DTL for the consequent beam commissioning.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO09  
About • Received ※ 15 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 15 September 2022
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TUPOJO10 Hardware Commissioning With Beam at the European Spallation Source: Ion Source to DTL1 360
TUOPA01   use link to see paper's listing under its alternate paper code  
 
  • B. Jones, R.A. Baron, C.S. Derrez, F. Grespanpresenter, 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. Grespanpresenter, 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
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TUPOJO11 Design of Beam Focusing System with Permanent Magnet for J-PARC LINAC MEBT1 364
 
  • Y. Fuwa, K. Moriya, T. Takayanagi
    JAEA/J-PARC, Tokai-mura, Japan
 
  Space charge compensation technology using higher-order multipole magnetic field components has been proposed to transport high-intensity charged particle beams for J-PARC LINAC MEBT1. In order to realize this compensation technology in a limited beam line space, we devised a compact-size combined-function multipole permanent magnet. This magnet can produce two multipole components at the same location on the beam line. As a first step, we have designed a magnet to simultaneously generate a fixed-strength quadrupole and an adjustable-strength octupole component using permanent magnet materials. In this magnet model, the magnetic circuit consists of two groups of magnets.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO11  
About • Received ※ 20 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 02 September 2022
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TUPOJO12 Development of Emittance Meter Instrument for MYRRHA 368
 
  • A. Rodríguez Páramo, I. Bustinduypresenter, S. Masa, R. Miracoli, V. Toyos, S. Varnasseri
    ESS Bilbao, Zamudio, Spain
  • L. De Keukeleere, F. Doucet, A. Ponton, A. Tanquintic
    SCK•CEN, Mol, Belgium
  • J. Herranz
    Proactive Research and Development, Sabadell, Spain
 
  For the commissioning of the Myrrha proton Linac an Emittance Meter Instrument (EMI) has been foreseen. The EMI will be installed in a dedicated test bench for linac commissioning. The test bench will be initially placed after the RFQ with energies of 1.5 MeV, and in later stages moved to other sections of the Normal Con-ducting Linac for operation at 6 and 17 MeV. The Myrrha EMI will be composed by two slit and grid subsystems for measurement of the phase space in the horizontal and vertical directions. For collimating the beam, graphite slits are used, and the beam aperture is measured in the SEM grids placed downstream. Then, the control system performs signal amplification, data acquisition, and motion control, with the different sys-tems integrated in an EPICs IOC. The system, manufactured by ESS-Bilbao and Proac-tive R&D, has been tested on the ESS-Bilbao 45 keV and soon will be integrated in Myrrha facilities. We present the EMI design, with irradiation analysis and emittance reconstruction, and the integration tests results.  
poster icon Poster TUPOJO12 [1.141 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO12  
About • Received ※ 19 August 2022 — Revised ※ 30 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 07 September 2022
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TUPOJO13 Wire Scanner Systems at the European Spallation Source (ESS): Tests and First Beam Commissioning Results 372
 
  • C.S. Derrez, I. Bustinduy, E.M. Donegani, V. Grishin, H. Kocevar, J.P.S. Martins, N. Milas, R. Miyamoto, T.J. Shea, R. Tarkeshian, C.A. Thomas, P.L. van Velze
    ESS, Lund, Sweden
  • S. Cleva, R. De Monte, M. Ferianis, S. Grulja
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • I. Mazkiaran, A.R. Páramo
    ESS Bilbao, Zamudio, Spain
 
  The ESS beam instrumentation includes 3 different type of Wire Scanners (WS). Double wires systems are deployed in the MEBT part of NCL, and single wires and flying wire instruments are being tested and installed in the higher energy sections of the ESS linac. First beam tests result from the MEBT systems will be presented. The superconducting linac WS systems are based on scintillator detectors and wavelength shifting fibers are mounted on the beam pipe. The detectors are coupled to long haul optical fibers, which carry the signals to custom front end electronics sitting in controls racks at the surface. The acquisition chain have been characterized at IHEP (Protvino, Russia), ELETTRA (Trieste, Italy), CERN PSB, CoSy (IKP, Germany) and SNS (USA) before installation in the ESS tunnel. The test results of this system design, differing from the standard approach where photomultipliers are coupled to the scintillator will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO13  
About • Received ※ 24 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 01 September 2022
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TUPOJO14 Status of Testing and Commissioning of the Medium Energy Beam Transport Line of the ESS Normal Conducting Linac 376
 
  • A.G. Sosa, R.A. Baron, H. Danared, C.S. Derrez, E.M. Donegani, M. Eshraqi, V. Grishin, A. Jansson, M. Jensen, B. Jones, E. Laface, B. Lagoguez, Y. Levinsen, J.P.S. Martins, N. Milas, R. Miyamoto, D.J.P. Nicosia, D. Noll, D.C. Plostinar, T.J. Shea, R. Tarkeshian, C.A. Thomas, E. Trachanas, P.L. van Velze
    ESS, Lund, Sweden
  • 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
 
  The latest beam commissioning phase of the Normal Conducting Linac at ESS delivered a proton beam through the Medium Energy Beam Transport (MEBT) into the first Drift Tube Linac (DTL) tank. The probe beam in MEBT consisted of 3.6 MeV protons of <6 mA, <5 microseconds pulse length and 1 Hz repetition rate. Following the delivery of the components at ESS in Lund in June 2019, the commissioning phase with the MEBT was completed in July 2022. In March 2022, the maximum beam current of 62.5 mA was transported up to the MEBT Faraday cup. This proceeding focuses on the status of MEBT including magnets, buncher cavities, scrapers and beam diagnostics designed and tested in collaboration with ESS Bilbao.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO14  
About • Received ※ 13 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 01 September 2022
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TUPOJO15 Commissioning of UKRI-STFC SRF Vertical Test and HPR Reprocessing Facility 380
 
  • M.D. Pendleton, A.E.T. Akintola, R.K. Buckley, G. Collier, K.D. Dumbell, M.J. Ellis, S. Hitchen, P.C. Hornickel, G. Hughes, C.R. Jenkins, A.J. Maypresenter, P.A. McIntosh, K.J. Middleman, A.J. Moss, S.M. Pattalwar, J.O.W. Poynton, P.A. Smith, A.E. Wheelhouse, S. Wilde
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • G. Jones, M. Lowe, D.A. Mason, G. Miller, C. Mills, J. Mutch, A. Oates, J.T.G. Wilson
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
 
  Mark Pendleton, et al. The UK’s first and only vertical test facility and associated cleanroom reprocessing suite has been developed, commissioned, and entered steady-state operations at the UKRI-STFC Daresbury Laboratory. The facility is capable of 2 K testing of 3 jacketed SRF cavities in a horizontal configuration per 2-week test cycle. We report on the associated cryogenic, RF, UHV, mechanical, cleanroom, and HPR infrastructure. SRF cavity workflows have been developed to meet the requirements of the ESS high beta cavity project within a newly developed quality management system, SuraBee, in accordance with ISO9001. To support standardisation of measurements across the collaboration, reference cavities have been measured for cross-reference between CEA, DESY, and UKRI-STFC. We further report on commissioning objectives, observations, and continuous improvement activities.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO15  
About • Received ※ 24 August 2022 — Revised ※ 31 August 2022 — Accepted ※ 05 September 2022 — Issue date ※ 08 September 2022
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TUPOJO17 High Efficiency High Power Resonant Cavity Amplifier For PIP-II 384
 
  • R.E. Simpson, N. Butler, D.B. Cope, M.P.J. Gaudreau, M.K. Kempkes
    Diversified Technologies, Inc., Bedford, Massachusetts, USA
 
  An advanced high-power, high power density, solid state power amplifier (SSPA) was developed to replace Vacuum Electron Devices (VEDs). Diversified Technologies, Inc. (DTI) developed and integrated a resonant-cavity combiner with solid state amplifiers for the Proton Improvement Plan-II (PIP-II) at Fermilab. The architecture combines the power of N-many RF power transistors into a single resonant cavity that are surface-mounted and -cooled. The system is designed so that failure of individual transistors has negligible performance impact. Due to the electrical and mechanical simplicity, maintenance and logistics are simplified. DTI demonstrated the basic feasibility of a 50-100 kW class amplifier resonant cavity combiner system at 650 MHz. A single-cavity system reached 15 kW at 66% power-added efficiency with ten of 12 slots filled on only 1 of 2 cavities faces. The system further demonstrated the expected graceful degradation; an intermittent fault occurred on 1 of the 10 modules and the only observable effect was a reduction in output power to 13.3 kW with a slight reduction in efficiency. Combining of multiple cavities was also demonstrated at low power.  
poster icon Poster TUPOJO17 [0.790 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO17  
About • Received ※ 16 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 15 September 2022
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TUPOJO18 Cavity Qualification and Production Update for SNS-PPU Cryomodules at Jefferson Lab 387
 
  • P. Dhakal, E. Daly, J.F. Fischer, N.A. Huque
    JLab, Newport News, Virginia, USA
  • M.P. Howell
    ORNL, Oak Ridge, Tennessee, USA
  • J.D. Mammosser
    ORNL RAD, Oak Ridge, Tennessee, USA
 
  Funding: This manuscript has been authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
The Proton Power Upgrade (PPU) project at Oak Ridge National Lab’s Spallation Neutron Source (SNS) currently being constructed will double the proton beam power capability from 1.4 to 2.8 MW by adding seven cryomodules, each containing four six-cell high-beta (β = 0.81) superconducting radio frequency cavities. Research Instruments, located in Germany, built and processed the cavities at the vendor site, including electropolishing as the final active chemistry step. Twenty-eight cavities for seven cryomodules and an additional four cavities for a spare cryomodules were delivered to Jefferson Lab and first qualification tests were completed on all cavities as received from the vendor. The performance largely exceeded the requirements on quality factor and accelerating gradient. Here we present the status of initial cavity qualification tests, rework on unqualified cavities and final cavity qualification with helium vessel prior to installation in cryomodules. In addition, an update on cryomodule production is presented.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO18  
About • Received ※ 23 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 09 September 2022
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TUPOJO19 Progress on the Proton Power Upgrade Project at the Spallation Neutron Source 390
 
  • M.S. Champion, C.N. Barbier, M.S. Connell, J. Galambos, M.P. Howell, S.-H. Kim, J.S. Moss, B.W. Riemer, K.S. White
    ORNL, Oak Ridge, Tennessee, USA
  • E. Daly
    JLab, Newport News, Virginia, USA
  • N.J. Evans, G.D. Johns
    ORNL RAD, Oak Ridge, Tennessee, USA
  • D.J. Harding
    Fermilab, Batavia, Illinois, USA
 
  Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract number DE-AC05-00OR22725.
The Proton Power Upgrade Project at the Spallation Neutron Source at Oak Ridge National Laboratory will increase the proton beam power capability from 1.4 to 2.8 MW. Upon completion of the project, 2 MW of beam power will be available for neutron production at the existing first target station with the remaining beam power available for the future second target station. The project will install seven superconducting RF cryomodules and supporting RF power systems and ancillaries to increase the beam energy to 1.3 GeV . The injection and extraction region of the accumulator ring will be upgraded, and a new 2 MW mercury target has been developed along with supporting equipment for high-flow gas injection to mitigate cavitation and fatigue stress. Equipment is being received from vendors and partner laboratories, and installation is underway with three major installation outages planned in 2022-2024. The project is planned to be completed in 2025.
 
poster icon Poster TUPOJO19 [1.361 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO19  
About • Received ※ 22 August 2022 — Revised ※ 15 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 01 September 2022
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TUPOJO20 Progress of the ESS Proton Beam Imaging Systems 394
TUOPA02   use link to see paper's listing under its alternate paper code  
 
  • E. Adli, G. Christoforo, E.D. Fackelman, H.E. Gjersdalpresenter, O.M. Røhne, K.N. Sjobak
    University of Oslo, Oslo, Norway
  • S. Bjorklund, S. Joshi
    University College West, Trollhätan, Sweden
  • M.G. Ibison
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • M.G. Ibison
    The University of Liverpool, Liverpool, United Kingdom
  • Y. Levinsen, K.E. Rosengren, T.J. Shea, C.A. Thomas
    ESS, Lund, Sweden
 
  The ESS Target Proton Beam Imaging System has as objective to image the 5 MW ESS proton beam as it enters the spallation target. The Imaging System has to operate in a harsh radiation environment, leading to a number of challenges : development of radiation hard photon sources, long and aperture-restricted optical paths and fast electronics required to provide rapid information in case of beam anomalies. This paper outlines how main challenges of the Imaging System have been addressed, and the status of deployment as ESS gets closer to beam.  
poster icon Poster TUPOJO20 [21.417 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO20  
About • Received ※ 24 August 2022 — Revised ※ 31 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 02 September 2022
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TUPOJO21 The Pre-Injector Upgrade for the ISIS H⁻ Linac 398
TUOPA03   use link to see paper's listing under its alternate paper code  
 
  • S.R. Lawrie, R.E. Abel, C. Cahill, D.C. Faircloth, A.P. Letchford, J.H. Macgregor, S. Patel, T.M. Sarmento, J.D. Speed, O.A. Tarvainen, M. Whitehead, T. Wood
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
 
  A new maintenance-free, high current, high duty-factor H linac pre-injector is being commissioned for the ISIS pulsed spallation neutron and muon facility. As well as delivering a low emittance-growth, loss-free beam, the pre-injector incorporates a chopper to facilitate arbitrary bunch time-structures. A 50 Hz, 0.9 ms (4.5% duty factor) RF-driven H ion source operates extremely reliably and with a large available parameter space via a novel microwave ignition gun and a wideband solid-state RF amplifier. A 202.5 MHz medium energy beam transport (MEBT) incorporates eight quadrupole magnets with integrated xy steerers, four quarter-wave re-bunching cavities, four extremely compact beam position monitors and an electrostatic chopper in just two metres of footprint. Beam has been extracted from the ion source and MEBT commissioning is due Spring 2023. Thereafter, the entire pre-injector will be soak-tested offline for a year before installing on the user facility.  
slides icon Slides TUPOJO21 [1.784 MB]  
poster icon Poster TUPOJO21 [3.053 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO21  
About • Received ※ 13 August 2022 — Revised ※ 16 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 05 September 2022
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TUPOJO22 Progress of PIP-II Activities at IJCLab 402
 
  • P. Duchesne, N. Gandolfopresenter, D. Le Dréan, D. Longuevergne, R. Martret, T. Pépin-Donat, F. Rabehasy, S. Roset, L.M. Vogt
    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
  • P. Berrutti, M. Parise, D. Passarelli
    Fermilab, Batavia, Illinois, USA
 
  Since 2018, IJCLab is involved in PIP-II project on the design and development of accelerator components for the SSR2 (Single Spoke Resonator type 2) section of the superconducting linac. First pre-production components have been fabricated, surface processing and cavity qualification in vertical cryostat are on-going. IJCLab has upgraded its facilities by developing a new set-up to perform rotational BCP. The progress of all processing and testing activities for PIP-II project will be reported and, in particular, a dedicated study to qualify removal uniformity compared to static BCP will be presented.  
poster icon Poster TUPOJO22 [1.997 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO22  
About • Received ※ 23 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 01 September 2022
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TUPOJO23 Accelerated Lifetime Test of Spoke Cavity Cold Tuning Systems for Myrrha 406
 
  • N. Gandolfo, S. Blivet, F. Chatelet, V. Delpech, D. Le Dréan, G. Mavilla, M. Pierens, H. Saugnac
    Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
 
  Within the framework of MINERVA, the first Phase of MYRRHA (Multi-purpose hYbrid Research Reactor for High-tech Applications) project, IN2P3 labs are in charge of the developments of several accelerator elements. Among those, a fully equipped Spoke cryomodule prototype was constructed, it integrates two superconducting single spoke cavities operating at 2K, the RF power couplers and the associated cold tuning systems. The extreme reliability specified for this project motivated to conduct ALT (Accelerated Lifetime Test) on two extra cold tuning systems in cryomodule like environment. Thus, by gathering information from experimental data, many aspects can be enhanced like maintenance plan consolidation, determination of aging indicators and design optimization of the whole system and its sub components. This paper describes the complete ALT process from the studying elements and the test environment design, to the experimental results and findings.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO23  
About • Received ※ 15 August 2022 — Revised ※ 17 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 02 September 2022
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