WED —  WGD - Commissioning and Operations   (06-Oct-21   10:00—11:00)
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WEDC1 Study on the Injection Beam Commissioning and Painting Methods for CSNS/RCS 191
  • M.Y. Huang, S. Wang, S.Y. Xu
    IHEP, Beijing, People’s Republic of China
  Funding: Work supported by National Natural Science Foundation of China (Project Nos. 12075134 and U1832210 )
In this paper, firstly, the beam commissioning of the injection system for CSNS/RCS will be studied, including: timing adjustment of the injection pulse powers, injection beam parameter matching, calibration of the injection painting bumps, measurement of the painting distribution, injection method adjustment, application of the main stripping foil, optimization of the injection beam loss and radiation dose, etc. Secondly, the painting methods for the CSNS/RCS will be studied, including: the fixed-point injection method, anti-correlated painting method and correlated painting method. The results of the beam commissioning will be compared with the simulation results. Combining with other precise optimizations, the beam power on the target has successfully reached the design value of 100kW and the stable operation of the accelerator has been achieved.
DOI • reference for this paper ※  
About • Received ※ 10 October 2021 — Revised ※ 19 October 2021 — Accepted ※ 22 November 2021 — Issue date ※ 05 January 2022
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WEDC2 Acceleration of the High Current Deuteron Beam Through the IFMIF-EVEDA RFQ: Confirmation of the Design Beam Dynamics Performances 197
  • L. Bellan, L. Antoniazzi, M. Comunian, E. Fagotti, M.G. Giacchini, F. Grespan, M. Montis, A. Palmieri, A. Pisent, M. Poggi
    INFN/LNL, Legnaro (PD), Italy
  • T. Akagi, K. Kondo, K. Masuda, M. Sugimoto
    QST, Aomori, Japan
  • B. Bolzon, N. Chauvin
    CEA-IRFU, Gif-sur-Yvette, France
  • P. Cara, F. Scantamburlo
    IFMIF/EVEDA, Rokkasho, Japan
  • Y. Carin, H. Dzitko
    F4E, Germany
  • D. Jimenez-Rey, I. Podadera
    CIEMAT, Madrid, Spain
  • J. Marroncle
    CEA-DRF-IRFU, France
  • I. Moya
    Fusion for Energy, Garching, Germany
  The Linear IFMIF Prototype Accelerator (LIPAc) is a high intensity D+ linear accelerator; demonstrator of the International Fusion Material Irradiation Facility (IFMIF). In summer 2019 the IFMIF/EVEDA Radio Frequency Quadrupole (RFQ) accelerated its nominal 125 mA deuteron (D+) beam current up to 5 MeV, with >90% transmission for pulses of 1 ms at 1 Hz, reaching its nominal beam dynamics goal. The paper presents the benchmark simulations and measurements performed to characterize the as-built RFQ performances, in the low and high perveance regime. In this framework, the commissioning strategy with a particular focus on the reciprocal effects of the low-medium energy transfers lines and the RFQ is also discussed. In the last part of the paper, the future commissioning outlooks are briefly introduced.  
slides icon Slides WEDC2 [2.696 MB]  
DOI • reference for this paper ※  
About • Received ※ 05 October 2021 — Revised ※ 20 October 2021 — Accepted ※ 22 November 2021 — Issue date ※ 27 January 2022
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WEDC3 Status of FRIB Commissioning 203
  • P.N. Ostroumov, F. Casagrande, K. Fukushima, M. Ikegami, T. Kanemura, S.H. Kim, S.M. Lidia, G. Machicoane, T. Maruta, D.G. Morris, A.S. Plastun, J.T. Popielarski, 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, is approaching the commencement of user operation in 2022 as planned. The readiness of the linear accelerator for the production of rare isotopes was verified by the acceleration of Xenon-124 and Krypton-86 heavy ion beams to 212 MeV/u using all 46 cryomodules with 324 superconducting cavities. Several key technologies were successfully 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 heavy ions with a thin liquid lithium film flowing in an ultrahigh vacuum environment, and simultaneous acceleration of multiple-charge-state-heavy ion beams. These technologies are required to achieve ultimate FRIB beam energies beyond 200 MeV/u and beam power up to 400 kW. High intensity pulsed beams capable in delivering 200 kW beams to the target in CW mode were studied in the first segment of the linac.
slides icon Slides WEDC3 [2.437 MB]  
DOI • reference for this paper ※  
About • Received ※ 16 October 2021 — Revised ※ 20 October 2021 — Accepted ※ 22 November 2021 — Issue date ※ 24 December 2021
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Optimizing Performance of a the SNS High Power SCL  
  • A.P. Shishlo
    ORNL, Oak Ridge, Tennessee, USA
  • C.C. Peters
    ORNL RAD, Oak Ridge, Tennessee, USA
  Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy.
Overall performance of the SNS accelerator complex depends on all its components from the front end to the target. This presentation overviews performance optimization of one component, namely the superconducting linac (SCL). The SNS is a user facility, so the performance is defined by the availability of the facility to users which should be maximized. The theoretical algorithms, software applications, and practical aspects that were used to optimize SCL performance at SNS are discussed. The details of the speeding up and automation of SCL tuning/retuning process are presented.
slides icon Slides WEDC4 [3.240 MB]  
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