TUIYGD —  Invited Orals: Hadron Accelerators   (14-Jun-22   11:00—12:30)
Chair: T. Koseki, KEK, Ibaraki, Japan
Paper Title Page
TUIYGD1 The Status of the ESS Project 792
 
  • A. Jansson
    ESS, Lund, Sweden
 
  Funding: Talk given on behalf of the ESS Accelerator Collaboration.
The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be the world’s most powerful linear accelerator driving a neutron spallation source, with an ultimate beam average power of 5 MW at 2.0 GeV. The LINAC accelerates a proton beam of 62.5 mA peak current at 4 % duty cycle (2.86 ms at 14 Hz). The accelerator uses a normal conducting front-end bring-ing the beam energy to 90 MeV, beyond that the accelera-tion up to 2 GeV is performed using superconducting structures. The accelerator is built by a European collabo-ration consisting of 23 European institutes delivering in-kind contributions of most hardware but also of services for installation and testing. More than half of the original 510 M€ for the accelerator budget being in form of in-kind contributions. This talk will give an overview of the status of the ESS accelerator and comment on the chal-lenges the accelerator collaboration has encountered and how we together are addressing these challenges.
 
slides icon Slides TUIYGD1 [23.318 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUIYGD1  
About • Received ※ 08 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 20 June 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUIYGD2 The Present Status and Future Plan with Charge Stripper Ring at RIKEN RIBF 796
 
  • H. Imao
    RIKEN Nishina Center, Wako, Japan
 
  RIKEN RI Beam Factory (RIBF), providing the world’s most intense heavy-ion beams more than 345 AMeV, is a leading facility for generating in-flight RI beams. RIBF has been steadily developing its performance after since 2006. In particular, the beam intensity of uranium beams, which is important to produce in-flight fission RI beams, was drastically increased by a factor of 240 compared to 2008. For further intensity upgrade of the uranium beams, the total charge stripping efficiency less than 5% of two strippers, He gas and rotating graphite sheet disk strippers, is a serious bottleneck. A new acceleration scheme with charge stripper rings (CSRs) as a cost-effective way to enhance the charge stripping efficiency has been proposed. The CSR recycles beams other than the selected charge state that was previously dumped. These beams are orbited in the CSR while suppressing emittance growth, and then re-enter the stripper. The CSR is being studied as a future plan, aiming at a 10-fold increase in the intensity of the uranium beams. The present status and the future plan with the CSR at RIBF will be presented.  
slides icon Slides TUIYGD2 [4.735 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUIYGD2  
About • Received ※ 13 June 2022 — Revised ※ 19 June 2022 — Accepted ※ 30 June 2022 — Issue date ※ 01 July 2022
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TUIYGD3 FRIB Commissioning and Early Operations 802
 
  • J. Wei, H. Ao, S. Beher, G. Bollen, N.K. Bultman, F. Casagrande, W. Chang, Y. Choi, S. Cogan, C. Compton, M. Cortesi, J.C. Curtin, K.D. Davidson, X.-J. Du, K. Elliott, B. Ewert, A. Facco, A. Fila, K. Fukushima, V. Ganni, A. Ganshyn, T. Glasmacher, J.-W. Guo, Y. Hao, W. Hartung, N.M. Hasan, M. Hausmann, K. Holland, H.-C. Hseuh, M. Ikegami, D.D. Jager, S. Jones, N. Joseph, T. Kanemura, S.H. Kim, C. Knowles, P. Knudsen, T. Konomi, B.R. Kortum, T. Lange, M. Larmann, T.L. Larter, K. Laturkar, R.E. Laxdal, J. LeTourneau, Z. Li, S.M. Lidia, G. Machicoane, C. Magsig, P.E. Manwiller, F. Marti, T. Maruta, E.S. Metzgar, S.J. Miller, Y. Momozaki, D.G. Morris, M. Mugerian, I.N. Nesterenko, C. Nguyen, P.N. Ostroumov, M.S. Patil, A.S. Plastun, J.T. Popielarski, L. Popielarski, M. Portillo, J. Priller, X. Rao, M.A. Reaume, H.T. Ren, K. Saito, B.M. Sherrill, A. Stolz, B.P. Tousignant, R. Walker, X. Wang, J.D. Wenstrom, G. West, K. Witgen, M. Wright, T. Xu, T. Xu, Y. Yamazaki, T. Zhang, Q. Zhao, S. Zhao
    FRIB, East Lansing, Michigan, USA
  • B. Arend, T.N. Ginter, E. Kwan, M.K. Smith, M. Steiner, O. Tarasov
    NSCL, East Lansing, Michigan, USA
  • A. Facco
    INFN/LNL, Legnaro (PD), Italy
  • K. Hosoyama
    KEK, Ibaraki, Japan
  • M.P. Kelly, Y. Momozaki
    ANL, Lemont, Illinois, USA
  • R.E. Laxdal
    TRIUMF, Vancouver, Canada
  • M. Wiseman
    JLab, Newport News, Virginia, USA
 
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
The Facility for Rare Isotope Beams (FRIB) project has completed technical construction in January 2022, five months ahead of schedule baselined about 10 years ago. Beam commissioning has been planned in seven phases starting from 2017 when the normal-conducting ion source and RFQ were commissioned. In April 2021, FRIB driver linac commissioning was completed with heavy ion beams being accelerated to energies above 200 MeV/u using 324 superconducting radiofrequency (SRF) resonators contained in 46 cryomodules. In preparation for high-power operations, a liquid lithium charge strip-per was used to strip uranium beam from average charge state of 33+ to 78+, and multiple charge states were accelerated simultaneously in the linac. By January 2022, FRIB target and fragment separator commissioning was completed with rare-isotope beams produced and identified. In May 2022, the first FRIB user scientific experiment was successfully conducted. This talk summarizes the FRIB accelerator project commissioning and early operations experience with discussions on strategic planning, operational envelope conformance, technical risk mitigation, and lessons learned.
 
slides icon Slides TUIYGD3 [23.483 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUIYGD3  
About • Received ※ 07 June 2022 — Revised ※ 10 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 06 July 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)