Electron Accelerators and Applications
Colliders
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MO2AA04 Electron Ion Collider Strong Hadron Cooling Injector and ERL 7
 
  • E. Wang, W.F. Bergan, F.J. Willeke
    BNL, Upton, New York, USA
  • S.V. Benson, K.E. Deitrick
    JLab, Newport News, Virginia, USA
  • D. Douglas
    Douglas Consulting, York, Virginia, USA
  • C.M. Gulliford
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  • C.E. Mayes, N.W. Taylor
    Xelera Research LLC, Ithaca, New York, USA
  • J. Qiang
    LBNL, Berkeley, California, USA
  
  Funding: The work is supported by Brookhaven Science Associates, LLC under Contract No. DESC0012704 with the U.S. Department of Energy.
Intra-beam Scattering (IBS) and other diffusion mechanisms in the EIC Hadron Storage Ring (HSR) degrade the beam emittances during a store, with growth times of about 2 hours at the nominal proton energies of 275GeV, 100 GeV, and 41 GeV. Strong Hadron Cooling (SHC) can maintain good hadron beam quality and high luminosity during long collision stores. A novel cooling method ’ Coherent electron Cooling (CeC) ’ is chosen as the baseline SHC method, due to its high cooling rates. An Energy Recovery Linac (ERL) is used to deliver an intense high-quality electron beam for cooling. In this paper, we discuss the beam requirements for SHC-CeC and describe the current status of the injector and ERL designs. Two designs of injector and ERL will be presented: one for dedicated SHC and another one for SHC with precooler. 		 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MO2AA04  
About • Received ※ 23 August 2022 — Revised ※ 25 August 2022 — Accepted ※ 27 August 2022 — Issue date ※ 31 August 2022
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MOPOJO03 HELEN: A Linear Collider Based on Advanced SRF Technology 31
 
  • S.A. Belomestnykh, P.C. Bhat, M. Checchin, A. Grassellino, M. Martinello, S. Nagaitsev, S. Posen, A.S. Romanenko, V.D. Shiltsev, A. Valishev, V.P. Yakovlev
    Fermilab, Batavia, Illinois, USA
  • S.A. Belomestnykh
    Stony Brook University, Stony Brook, USA
  • H. Padamsee
    Cornell University, Ithaca, New York, USA
  
  Funding: Work supported by the Fermi National Accelerator Laboratory, managed and operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
This paper discusses recently proposed Higgs-Energy LEptoN (HELEN) e+e’ linear collider based on advances superconducting radio frequency technology. The collider offers cost and AC power savings, smaller footprint (relative to the ILC), and could be built at Fermilab with an Interaction Region within the site boundaries. After the initial physics run at 250 GeV, the collider could be upgraded either to higher luminosity or to higher (up to 500 GeV) energies. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOJO03  
About • Received ※ 24 August 2022 — Revised ※ 26 August 2022 — Accepted ※ 04 September 2022 — Issue date ※ 15 September 2022
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