Paper | Title | Other Keywords | Page |
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MOPOGE15 | Operation of the H− Linac at FNAL | linac, operation, quadrupole, rfq | 184 |
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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 | ||
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MOPORI01 | A Multi-Camera System for Tomographic Beam Diagnostics | detector, vacuum, controls, synchrotron | 215 |
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A prototype of a beam-induced residual gas fluorescence monitor (BIF) has been developed and successfully tested at the Institute of Applied Physics (IAP) of the Goethe University Frankfurt. This BIF is based on ten single-board cameras inserted into the vacuum and directed onto the beam axis. The overall goal is to study the beam with tomography algorithms at a low energy beam transport section. Recently, we tested the detector with a 60keV, 15mA proton beam at 20Hz and 1ms puls length. In this paper we present the ongoing investigations on image processing and application of the algebraic reconstruction technique (ART). | |||
Poster MOPORI01 [1.826 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPORI01 | ||
About • | Received ※ 20 August 2022 — Revised ※ 21 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 01 September 2022 | ||
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MOPORI05 | Application of Virtual Diagnostics in the FEBE Clara User Area | simulation, operation, instrumentation, quadrupole | 231 |
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Funding: This work is supported by the AWAKE-UK phase II project funded by STFC and the STFC Cockcroft core grant No. ST/G008248/1. Successful user experiments at particle beam facilities are dependent upon the awareness of beam characteristics at the interaction point. Often, properties are measured beforehand for fixed operation modes; users then rely on the long-term stability of the beam. Otherwise, diagnostics must be integrated into a user experiment, costing resources and limiting space in the user area. This contribution proposes the application of machine learning to develop a suite of virtual diagnostic systems. Virtual diagnostics take data at easy to access locations, and infer beam properties at locations where a measurement has not been taken, and often cannot be taken. Here the focus is the user area at the planned Full Energy Beam Exploitation (FEBE) upgrade to the CLARA facility (UK). Presented is a simulation-based proof-of-concept for a variety of virtual diagnostics. Transverse and longitudinal properties are measured upstream of the user area, coupled with the beam optics parameters leading to the user area, and input into a neural network, to predict the same parameters within the user area. Potential instrumentation for FEBE CLARA virtual diagnostics will also be discussed. |
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Poster MOPORI05 [0.613 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPORI05 | ||
About • | Received ※ 17 August 2022 — Revised ※ 22 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 01 September 2022 | ||
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MOPORI06 | Improvements on the Modified Nomarski Interferometer for Measurements of Supersonic Gas Jet Density Profiles | laser, vacuum, experiment, focusing | 235 |
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Funding: This work is supported by the AWAKE-UK phase II project funded by STFC, the STFC Cockcroft core grant No. ST/G008248/1 and the HL-LHC-UK phase II project funded by STFC under Grant Ref: ST/T001925/1. For supersonic gas jet based beam profile monitors such as that developed for the High Luminosity Large Hadron Collider (HL-LHC) upgrade, density profile is a key characteristic. Due to this, non-invasive diagnostics to study the jet’s behaviour have been designed. A Nomarski interferometer was constructed to image jets 30 um to 1 mm in diameter and study changes in their density. A microscope lens has been integrated into the original interferometer system to capture phase changes on a much smaller scale than previous experiments have achieved. This contribution presents the optimisation and results gained from this interferometer. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPORI06 | ||
About • | Received ※ 14 August 2022 — Revised ※ 24 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 01 September 2022 | ||
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TUPOJO03 | Optimized Beam Optics Design of the MINERVA/MYRRHA Superconducting Proton Linac | linac, cavity, target, rfq | 337 |
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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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TUPOJO06 | Design and Test of Beam Diagnostics Equipment for the FAIR Proton Linac | linac, proton, electron, beam-diagnostic | 348 |
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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 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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TUPORI02 | New Injection Beamline for TRIUMF Cyclotron | injection, cyclotron, vacuum, ion-source | 545 |
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The TRIUMF Ion Source and Injection System (ISIS) beamline is used to transport the 300 keV H− beam from the ion source to the injection into the 500 MeV cyclotron. The vertical section of the beamline, upgraded in 2011, is very robust and reliable, while the horizontal section, now 50 years old, is very demanding in maintenance, and presents a high risk of downtime due to aging. The horizontal beamline is being re-designed with well proven optical concepts, and modern UHV technologies already used in the vertical section, and in the ARIEL RIB transport system; this will produce a more efficient system, easier to maintain and tune. The beamline will use electrostatic optical modules like matching, periodic, and 90-degree achromatic bend sections; updated elements include bunchers, a high-energy pulser, a 5:1 selector, and a new set of diagnostics. A crucial aspect of the new beamline is a magnetic shield, to compensate the cyclotron stray field, comprised of a mu-metal in-vacuum liner allowing HV feedthroughs and diagnostics insertion without breaking the shield continuity. The new injection beamline will be controlled via EPICS. The paper will present the status of the project. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI02 | ||
About • | Received ※ 23 August 2022 — Revised ※ 30 August 2022 — Accepted ※ 03 September 2022 — Issue date ※ 15 September 2022 | ||
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TUPORI18 | The Design of the Full Energy Beam Exploitation (FEBE) Beamline on CLARA | experiment, laser, electron, FEL | 585 |
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The CLARA facility at Daresbury Laboratory was orig-inally designed for the study of novel FEL physics utilis-ing high-quality electron bunches at up to 250 MeV/c. To maximise the exploitation of the accelerator complex, a dedicated full energy beam exploitation (FEBE) beam-line has been designed and is currently being installed in a separate vault on the CLARA accelerator. FEBE will allow the use of high charge (up to 250 pC), moderate energy (up to 250 MeV), electron bunches for a wide variety of accelerator applications critical to ongoing accelerator development in the UK and international communities. The facility consists of a shielded enclo-sure, accessible during beam running in CLARA, with two very large experimental chambers compatible with a wide range of experimental proposals. High-power laser beams (up to 100 TW) will be available for electron-beam interactions in the first chamber, and there are concrete plans for a wide variety of advanced diagnostics (includ-ing a high-field permanent magnet spectrometer and dielectric longitudinal streaker), essential for multiple experimental paradigms, in the second chamber. FEBE will be commissioned in 2024. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI18 | ||
About • | Received ※ 19 August 2022 — Revised ※ 23 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 15 September 2022 | ||
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WE1AA03 | FACET-II | plasma, electron, experiment, laser | 631 |
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Funding: This work performed under DOE Contract DE-AC02-76SF00515 and also supported under FES Award DE-SC0020076. FACET-II is a National User Facility at SLAC National Accelerator Laboratory providing 10 GeV electron beams with um-rad normalised emittance and peak currents exceeding 100 kA . FACET-II operates as a National User Facility while engaging a broad User community to develop and execute experimental proposals that advance the development of plasma wakefield accelerators. FACET-II is currently commissioned and has started with first experiments. The special features of FACET-II will be shown and first results from the experiments. |
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Slides WE1AA03 [6.471 MB] | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-WE1AA03 | ||
About • | Received ※ 20 August 2022 — Revised ※ 23 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 04 September 2022 | ||
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THPOJO01 | The ARES Linac at DESY | experiment, electron, linac, acceleration | 691 |
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The generation and acceleration of ultra-short, high quality electron beams has attracted more and more interest in accelerator science. Electron bunches with these properties are necessary to operate and test novel diagnostics and advanced high gradient accelerating schemes. Furthermore, several medical and industrial applications require high-brightness electron beams. The dedicated R&D linac ARES at DESY (Deutsches Elektronen-Synchrotron) is now fully operational and able to produce these electron beams at the nominal energy of 155 MeV and deliver it to users. This paper gives an overview of the ARES linac and summarizes the beam parameter measurements. The possibilities for user operation will be described in detail. | |||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPOJO01 | ||
About • | Received ※ 23 August 2022 — Revised ※ 31 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 06 September 2022 | ||
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THPOJO02 | Commissioning of a Movable Bunch Compressor for Sub-fs Electron Bunches | electron, dipole, linac, MMI | 695 |
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Funding: DESY is a research center within the Helmholtz association HGF. We present the first commissioning results of the movable bunch compressor (BC) designed for the ARES linac at DESY. The development and simulated performance has been reported earlier and predicts sub-fs electron bunches with high charge densities. Commissioning results of the injector part of the ARES linac delivered promising beam quality results to achieve these numbers. The bunch compressor system is foreseen to be used to bench mark numerical models for coherent synchrotron radiation (CSR) and space charge (SC) for ultra-short electron bunches. Here we will present first measurements of the dispersion as well as calculations for the longitudinal dispersion. In the future the PolariX transverse deflecting structure (TDS) will be commissioned to fully characterize the ARES electron beam. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPOJO02 | ||
About • | Received ※ 25 August 2022 — Revised ※ 23 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 15 September 2022 | ||
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THPORI02 | Machine Learning for Beam Orbit Correction at KOMAC Accelerator | network, proton, controls, linac | 848 |
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Funding: This work has been supported through KOMAC op-eration fund of KAERI by Ministry of Science and ICT, the Korean government (KAERI ID no. : 524320-22) There are approaches to apply machine learning (ML) techniques to efficiently operate and optimize particle accelerators. Deep neural networks-based model is applied to experiments, correcting beam orbit through the low energy beam transport at the proton injector test stand. For more complex applications, time-series analysis model is studied to predict beam orbit in the 100-MeV beamline at KOMAC. This paper describes experimental data to train neural networks model, and presents the performance of the machine learning models. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPORI02 | ||
About • | Received ※ 25 August 2022 — Revised ※ 01 September 2022 — Accepted ※ 08 September 2022 — Issue date ※ 15 September 2022 | ||
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FR1AA04 | SARAF Commissioning: Injector, MEBT and Chopper | rfq, MEBT, emittance, MMI | 872 |
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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. | |||
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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 | ||
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