Author: Pinayev, I.
Paper Title Page
WEPNEC24
 Design of an Energy Recovery Linac for Coherent Electron Cooling Experiment  
 
  • Y.C. Jing, V. Litvinenko, I. Pinayev, Y.H. Wu
    BNL, Upton, New York, USA
  • V. Litvinenko
    Stony Brook University, Stony Brook, USA
  • K. Shih
    SBU, Stony Brook, New York, USA
  
  Funding: Work is supported by Brookhaven Science Associates, LLC under Contract No. DEAC0298-CH10886 with the U.S. Department of Energy, DOE NP office grant DEFOA-0000632, and NSF grant PHY-1415252.
A Coherent electron Cooling (CeC) has a potential of substantial reducing cooling time of the high-energy hadrons and hence to boost luminosity in high-intensity hadron-hadron and electron-hadron colliders. In a CeC system, a high quality electron beam is generated, propagated and optimized through a beam line which was carefully designed with consideration of space charge effect, wakefields and nonlinear dynamics such as coherent synchrotron radiation and chromatic aberration. In this paper, we present our study on the beam dynamics of such a beam line and discuss the possibility of using an ERL for high repetition operation. 		 
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THCOYBS02 High Charge High Current Beam From BNL 113 MHz SRF Gun 145
 
  • I. Pinayev, I. Ben-Zvi, J.C. Brutus, M. Gaowei, T. Hayes, Y.C. Jing, V. Litvinenko, J. Ma, K. Mihara, G. Narayan, I. Petrushina, F. Severino, K. Shih, J. Skaritka, E. Wang, G. Wang, Y.H. Wu
    BNL, Upton, New York, USA
  • V. Litvinenko
    Stony Brook University, Stony Brook, USA
  • I. Petrushina, Y.H. Wu
    SUNY SB, Stony Brook, New York, USA
  • K. Shih
    SBU, Stony Brook, New York, USA
  
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The 113 MHz superconducting gun is used an electron source for the coherent electron cooling experiment. The unique feature of the gun is that a photocathode is held at room temperature. It allowed to preserve the quantum efficiency of Cs2KSb cathode which is adversely affected by cryogenic temperatures. Relatively low frequency permitted fully realize the accelerating field gradient what in turn helps to achieve 10 nC charge and 0.3 microns normalized emittance. We present the achieved performance and operational experience as well. 		 
slides icon Slides THCOYBS02 [4.350 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-THCOYBS02  
About • paper received ※ 03 September 2019       paper accepted ※ 08 July 2020       issue date ※ 24 June 2020  
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FRCOWBS02
 Design and Commissioning Experience with State of the Art MPS for LEReC Accelerator  
 
  • S. Seletskiy, Z. Altinbas, D. Bruno, M.R. Costanzo, K.A. Drees, A.V. Fedotov, D.M. Gassner, X. Gu, L.R. Hammons, J. Hock, R.L. Hulsart, P. Inacker, J.P. Jamilkowski, D. Kayran, J. Kewisch, C. Liu, K. Mernick, T.A. Miller, M.G. Minty, M.C. Paniccia, W.E. Pekrul, I. Pinayev, V. Ptitsyn, T.C. Shrey, L. Smart, K.S. Smith, R. Than, P. Thieberger, J.E. Tuozzolo, W. Xu, Z. Zhao
    BNL, Upton, New York, USA
  
  The Low Energy RHIC Electron Cooler (LEReC), the world’s first electron cooler to employ an RF electron accelerator, has been recently fully commissioned. The LEReC is a high-current, high-brightness accelerator featuring ~100 m of beamline and is designed to operate with 1.6-2.6 MeV electron beams of up to 140 kW beam power. The LEReC requires a dedicated machine protection system (MPS) capable of interlocking electron beam within 40 us and is equipped with multiple levels of protection. In this paper we summarize our experience with designing, building, and operating the LEReC MPS.  
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FRCOWBS03
 Beam Commissioning Experience at Low Energy RHIC Electron Cooler (LEReC)  
 
  • D. Kayran, Z. Altinbas, K.A. Drees, A.V. Fedotov, M. Gaowei, X. Gu, R.L. Hulsart, P. Inacker, J.P. Jamilkowski, Y.C. Jing, J. Kewisch, C. Liu, J. Ma, K. Mernick, T.A. Miller, M.G. Minty, M.C. Paniccia, I. Pinayev, V. Ptitsyn, V. Schoefer, S. Seletskiy, F. Severino, A. Sukhanov, P. Thieberger, J.E. Tuozzolo, E. Wang, G. Wang, H. Zhao, Z. Zhao
    BNL, Upton, New York, USA
  
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The high-current high-brightness electron accelerator for cooling of RHIC ions at low energy (LEReC) was successfully commissioned at BNL. A beam quality suitable for electron cooling has been achieved. Cooling of single ion bunches in RHIC using a new approach of bunched-beam electron cooling was demonstrated during 2019. To achieve such a cooling with non-magnetized electron beams and RF acceleration required proper beam manipulation in the longitudinal phase space while preserving transverse emittances. Electron beam with kinetic energy of 1.6 MeV with beam quality suitable for cooling was successfully propagated through 100 meters of beam lines including dispersion sections and maintained through both cooling sections in RHIC. The LEReC accelerator includes a photocathode DC gun, a laser system, a photocathode delivery system, magnets, beam diagnostics, a SRF booster cavity, and a set of Normal Conducting RF cavities to provide sufficient flexibility to tune the beam in the longitudinal phase space. In this paper we discuss experience learned during LEReC beam commissioning. 		 
slides icon Slides FRCOWBS03 [24.527 MB]  
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