Author: Brooks, S.J.
Paper Title Page
WECOYBS01
ERL with Fixed Field Altrernating Linear Gradient Role in EIC  
 
  • D. Trbojevic, J.S. Berg, S.J. Brooks, F. Méot, T. Roser, N. Tsoupas
    BNL, Upton, New York, USA
 
  We present few examples of the ERL with a single Fixed Field Alternating Linear Gradient (FFA-LG) return lines for Electron Ion Colliders LHeC, FCC ee and eRHIC. Examples of smaller energy ERL’s with a single FFA-LG beam lines are shown as well. The large energy ERL’s require fixed field triplet quadrupoles inside of the superconducting linacs. Electrons from the linac pass through the FFA-LG single return line made of two parts: the adiabatic transition beam line where the cell lengths decreases adiabatically and the arc section with repetitive triplet cells. The time of flight of different energies are corrected by additional orbit oscillations of smaller and higher energies as the FFA-LG time of flight dependence is a parabolic function with respect to the energy.  
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FRCOWBS04 Essential Instrumentation for the Characterization of ERL Beams 150
 
  • N. Banerjee, A.C. Bartnik, K.E. Deitrick, J. Dobbins, C.M. Gulliford, G.H. Hoffstaetter
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  • J.S. Berg, S.J. Brooks, R.J. Michnoff
    BNL, Upton, New York, USA
 
  Funding: This work was performed through the support of New York State Energy Research and Development Agency (NYSERDA).
The typical requirement of Energy Recovery Linacs to produce beams with high repetition rate and high bunch charge presents unique demands on beam diagnostics. ERLs being quite sensitive to time of flight effects necessitate the use of beam arrival time monitors along with typical position detection. Being subjected to a plethora of dynamic effects, both longitudinal and transverse phase space monitoring of the beam becomes quite important. Additionally, beam halo plays an important role determining the overall transmission. Consequently, we also need to characterize halo both directly using sophisticated beam viewers and indirectly using radiation monitors. In this talk, I will describe the instrumentation essential to ERL operation using the Cornell-BNL ERL Test Accelerator (CBETA) as a pertinent example.
 
slides icon Slides FRCOWBS04 [7.129 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-FRCOWBS04  
About • paper received ※ 19 September 2019       paper accepted ※ 01 November 2019       issue date ※ 24 June 2020  
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