Keyword: target
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MO3I3 Heavy Ion Stripping heavy-ion, operation, synchrotron, linac 24
 
  • P. Gerhard, M.T. Maier
    GSI, Darmstadt, Germany
 
  Ion stripping is primarily an essential technique for heavy ion accelerators in order to reach higher beam energies within reasonable size and budget limits. Due to the nature of the stripping process, the resulting ion beam contains ions of different charge states. Therefore, high beam loss is typically associated, making the net stripping efficiency one of the decisive elements of the overall performance of an accelerator or facility. Several technical implementations of strippers have been and are still being developed in order to obtain optimal stripping for different ions and beam energies by employing different kinds of stripping targets, namely gaseous, solid and more recently fluid materials. High beam intensities resulting in prohibitive energy deposition and target destruction are challenging. Optimizing a stripper may potentially increase the overall performance by a large factor with less effort than other actions. This gave rise to the pulsed gas stripper project at the GSI UNILAC. This talk will give an overview of different strippers at GSI and beyond. The second part will give a detailed report on the introduction of hydrogen at the GSI gas stripper.  
slides icon Slides MO3I3 [53.513 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO3I3  
About • Received ※ 21 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022  
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TUP03 Bunch Merging and Compression: Recent Progress with RF and LLRF Systems for FAIR cavity, LLRF, controls, operation 67
 
  • D.E.M. Lens, R. Balß, H. Klingbeil, U. Laier, J.S. Schmidt, K.G. Thomin, T. Winnefeld, B. Zipfel
    GSI, Darmstadt, Germany
  • H. Klingbeil
    TEMF, TU Darmstadt, Darmstadt, Germany
 
  Besides the realization of several new RF systems for the new heavy-ion synchrotron SIS100 and the storage rings CR and HESR, the FAIR project also includes an upgrade of the RF systems of the existing accelerator rings such as SIS18. The SIS18 RF systems currently comprise two ferrite cavities, three broadband magnetic-alloy cavities and one bunch-compressor cavity. In addition, the LLRF system has been continuously upgraded over the past years towards the planned topology that will be implemented for all FAIR ring accelerators. One of the challenges for the SIS18 RF systems is the large RF frequency span between 400 kHz and 5.4 MHz. Although the SIS18 upgrade is still under progress, a major part of the functionality has already been successfully tested with beam in machine development experiments (MDE). This includes multi-harmonic operation such as dual-harmonic acceleration and further beam gymnastics manipulations such as bunch merging and bunch compression. Many of these features are already used in standard operation. In this contribution, the current status is illustrated and recent MDE results are presented that demonstrate the capabilities of the RF systems for FAIR.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP03  
About • Received ※ 21 June 2022 — Revised ※ 30 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
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TUP16 Seven Decades of Science with Accelerators at IPHC neutron, experiment, proton, detector 104
 
  • F.R. Osswald
    IPHC, Strasbourg Cedex 2, France
 
  The Institut Pluridisciplinaire Hubert Curien (IPHC) is a laboratory with solid foundations and perspectives to overcome future challenges. It is a component of the Centre National de Recherche Scientifique (CNRS) and the university of Strasbourg. It has been founded in 2006 after fusion of three local laboratories in the field of ecology/environment, chemistry and subatomic physics. The activities related with subatomic physics presents a rich history which goes back to the 40’s and is now evolving towards new challenges at the frontier of the innovation with the contribution of other sciences as biology, chemistry, medicine and radiotherapy. The paper will recover a number of past and current activities with emphasis on the link between research and technology.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP16  
About • Received ※ 13 June 2022 — Revised ※ 28 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 30 September 2022
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WE1I3 FRIB Commissioning linac, operation, MMI, experiment 118
 
  • P.N. Ostroumov, F. Casagrande, K. Fukushima, K. Hwang, M. Ikegami, T. Kanemura, S.H. Kim, S.M. Lidia, G. Machicoane, T. Maruta, D.G. Morris, A.S. Plastun, H.T. Ren, J. Wei, T. Xu, T. Zhang, Q. Zhao, S. Zhao
    FRIB, East Lansing, Michigan, USA
 
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
The Facility for Rare Isotope Beams (FRIB), a major nuclear physics facility for research with fast, stopped and reaccelerated rare isotope beams, was successfully commissioned and is in operation. The acceleration of Xe, Kr, and Ar ion beams above 210 MeV/u using all 46 cryomodules with 324 superconducting cavities was demonstrated. Several key technologies were successful-ly developed and implemented for the world’s highest energy continuous wave heavy ion beams, such as full-scale cryogenics and superconducting radiofrequency resonator system, stripping of heavy ions with a thin liquid lithium film, and simultaneous acceleration of multiple-charge-state heavy ion beams. In December 2021, we demonstrated the production and identification of 84Se isotopes and, in January 2022, commissioned the FRIB fragment separator by delivering a 210 MeV/u argon beam to the separator’s focal plane. The first two user experiments with primary 48Ca and 82Se beams have been successfully conducted in May-June 2022.
 
slides icon Slides WE1I3 [6.543 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-WE1I3  
About • Received ※ 21 June 2022 — Revised ※ 29 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 29 September 2022
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TH2I2 Longitudinal Beam Diagnostics R&D at GSI-UNILAC radiation, electron, detector, diagnostics 144
 
  • R. Singh
    GSI, Darmstadt, Germany
 
  GSI UNILAC provides a wide variety of ion types from energies ranging from 1.4 MeV/u to ~11.5 MeV/u with a large dynamic range in the beam intensities to the experimental users or to the downstream accelerators. This flexibility in beam parameters requires a frequent tuning of the machine parameters for optimal operation of the UNILAC. Therefore, there has been a constant and pressing need for operationally convenient, accurate, fast and potentially non-destructive beam diagnostics for longitudinal charge profile and energy distribution. This contribution discusses the recent progress on longitudinal charge profile distribution measurements at GSI UNILAC. The outcome of recent devices like Fast Faraday cups (FFCs), transition radiation in GHz regime (GTR) is shown in comparison with phase probes or pick-ups. Other past developments aimed at longitudinal diagnostics at UNILAC like single particle detectors and RF deflector type methods are also briefly discussed.  
slides icon Slides TH2I2 [5.011 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TH2I2  
About • Received ※ 07 July 2022 — Revised ※ 20 July 2022 — Accepted ※ 10 August 2022 — Issue date ※ 19 September 2022
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