Author: Marhauser, F.
Paper Title Page
MOPAB393 Design of an RF-Dipole Crabbing Cavity System for the Electron-Ion Collider 1200
 
  • S.U. De Silva, J.R. Delayen
    ODU, Norfolk, Virginia, USA
  • J. Henry, F. Marhauser, H. Park, R.A. Rimmer
    JLab, Newport News, Virginia, USA
 
  The Electron-Ion Collider requires several crabbing systems to facilitate head-on collisions between electron and proton beams in increasing the luminosity at the interaction point. One of the critical rf systems is the 197 MHz crabbing system that will be used in crabbing the proton beam. Many factors such as the low operating frequency, large transverse voltage requirement, tight longitudinal and transverse impedance thresholds, and limited beam line space makes the crabbing cavity design challenging. The rf-dipole cavity design is considered as one of the crabbing cavity options for the 197 MHz crabbing system. The cavity is designed including the HOM couplers, FPC and other ancillaries. This paper presents the detailed electromagnetic design, mechanical analysis, and conceptual cryomodule design of the crabbing system.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB393  
About • paper received ※ 26 May 2021       paper accepted ※ 02 June 2021       issue date ※ 26 August 2021  
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TUPAB257 Analysis of Multibunch Spectrum for an Uneven Bunch Distribution in a Storage Ring 2058
 
  • R. Li, F. Marhauser
    JLab, Newport News, Virginia, USA
 
  Funding: This work is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.
Modern storage-ring designs often require an uneven bunch distribution pattern. An uneven bunch fill pattern can result in complex structures for the beam current spectra. Particularly at high average beam currents, these complex current spectra need to be taken into account in concern of beam-dynamical effects. In this study, we analyze a beam current spectrum for various filling patterns with bunch trains and gaps. The characteristics of the resulting beam current spectra are illustrated and discussed.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB257  
About • paper received ※ 21 June 2021       paper accepted ※ 28 June 2021       issue date ※ 12 August 2021  
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