Author: Kewisch, J.
Paper Title Page
Chromatic Correction of the EIC Electron Ring Lattice  
  • Y. Cai, Y.M. Nosochkov
    SLAC, Menlo Park, California, USA
  • J.S. Berg, J. Kewisch, Y. Li, D. Marx, C. Montag, S. Tepikian, F.J. Willeke
    BNL, Upton, New York, USA
  • G.H. Hoffstaetter, J.E. Unger
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  We have developed a new chromatic compensation scheme for the electron storage ring with two low-beta interaction regions in the electron-ion collider. The hybrid scheme consists of modular chromatic matching of periodic systems and beamlines. The first-order chromatically matched solutions are linearly parameterized with the local linear chromaticities that control the higher order chromatic beatings. The parameterization enables an efficient optimization of dynamic aperture. As a result, we successfully achieve the 1% design criterion for the momentum aperture in the ring.  
slides icon Slides MOYD6 [1.667 MB]  
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TUZD5 Experience and Challenges with Electron Cooling of Colliding Ion Beams in RHIC 325
  • A.V. Fedotov, X. Gu, D. Kayran, J. Kewisch, S. Seletskiy
    BNL, Upton, New York, USA
  Funding: Work supported by the U.S. Department of Energy.
Electron cooling of ion beams employing rf-accelerated electron bunches was successfully used for the RHIC physics program in 2020 and 2021 and was essential in achieving the required luminosity goals. This presentation will summarize experience and challenges with electron cooling of colliding ion beams in RHIC. We also outline ongoing studies using rf-based electron cooler LEReC.
slides icon Slides TUZD5 [1.373 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-TUZD5  
About • Received ※ 02 August 2022 — Accepted ※ 04 August 2022 — Issue date ※ 14 September 2022  
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WEPA78 Proton-Electron Focusing in EIC Ring Electron Cooler 820
  • S. Seletskiy, A.V. Fedotov, D. Kayran, J. Kewisch
    BNL, Upton, New York, USA
  The Electron Ion Collider (EIC) requires a cooling of protons at the top energy. The Ring Electron Cooler (REC) is a suitable option for such a cooling. In this paper we consider an effect of a proton-electron space charge (SC) focusing on the quality of the electron beam in the REC. We show that, with properly adjusted parameters of the Ring Electron Cooler, the SC focusing in the REC cooling section does not significantly affect the cooler performance.  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-WEPA78  
About • Received ※ 02 August 2022 — Revised ※ 03 August 2022 — Accepted ※ 09 August 2022 — Issue date ※ 20 August 2022
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