Plenary Session
Paper Title Page
MOIPI1 1 MW J-PARC RCS Beam Operation and Further Beyond 1
  • H. Hotchi
    KEK, Tokai, Ibaraki, Japan
  • H. Harada, N. Hayashi, M. Kinsho, K. Okabe, P.K. Saha, Y. Shobuda, F. Tamura, K. Yamamoto, M. Yamamoto, M. Yoshimoto
    JAEA/J-PARC, Tokai-mura, Japan
  The J-PARC RCS have recently established a 1 MW beam operation with low fractional beam loss of the order of 10-3. In this talk, our approaches to beam loss issues that we faced in the course of beam power ramp-up are reviewed. Our recent efforts to further beam power ramp-up beyond 1 MW are also presented.  
slides icon Slides MOIPI1 [2.210 MB]  
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About • Received ※ 04 October 2021 — Revised ※ 18 October 2021 — Accepted ※ 10 November 2021 — Issue date ※ 22 November 2021
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Beam Physics Challenges of EIC  
  • F.J. Willeke
    BNL, Upton, New York, USA
  The Electron Ion Collider under construction at Brookhaven National Laboratory, will provide unprecedented information about the origin of the properties of nucleons and nuclei. The requirement on the accelerator is quite demanding with luminosity in the order of 1E34/s/cm2, 70% spin polarized electrons and light ion beams, large range of center of mass energies (30-140 GeV) and collisions of electrons with a large range of ions from protons to Uranium. To implement this new collider, many interesting accelerator science questions have to be resolved which include beam-beam interaction with a large crossing angle of 25 mrad, dynamic aperture in presence of a highly constraint high luminosity interaction region, electron storage ring with an average polarization of 70% for both spin up and spin down in the same store, and with the required high beam currents of 2.5 A electrons and up to 1 A hadrons, some interesting high intensity effects such as fast ion instability and strong transient beam loading effects. The presentation will provide an overview of the accelerator physics of the electron ion collider.  
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Closeout & Announcement of HB2023  
  • I. Hofmann
    GSI, Darmstadt, Germany
  • E. Métral
    CERN, Meyrin, Switzerland
  Closing of HB2021 and Announcement of HB2023  
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