Author: Than, R.
Paper Title Page
MOPDTH014 Status and Commissioning Results of the R&D ERL at BNL 10
 
  • D. Kayran, Z. Altinbas, D.R. Beavis, S.A. Belomestnykh, I. Ben-Zvi, S. Deonarine, D.M. Gassner, R.C. Gupta, H. Hahn, L.R. Hammons, C. Ho, J.P. Jamilkowski, P. K. Kankiya, N. Laloudakis, R.F. Lambiase, V. Litvinenko, G.J. Mahler, L. Masi, G.T. McIntyre, T.A. Miller, J. Morris, D. Phillips, V. Ptitsyn, T. Rao, T. Seda, B. Sheehy, L. Smart, K.S. Smith, T. Srinivasan-Rao, A.N. Steszyn, R. Than, E. Wang, D. Weiss, H. Xie, W. Xu, A. Zaltsman
    BNL, Upton, Long Island, New York, USA
  • S.A. Belomestnykh, I. Ben-Zvi, L.R. Hammons, D. Kayran, V. Litvinenko, V. Ptitsyn
    Stony Brook University, Stony Brook, USA
 
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy
An ampere class 20 MeV superconducting Energy Recovery Linac (ERL) is presently under commissioning at Brookhaven National Laboratory (BNL) for testing of concepts relevant for high-energy coherent electron cooling and electron-ion colliders. The injector subsystems tests and installation were finished in fall 2013. The injector includes: SRF photoelectron gun with 1 MW amplifier, 10W green drive-laser system, multi-alkaline cathode deposition system, cathode transport system, beam instrumentation and control. * The first photo current from ERL SRF gun has been observed in fall 2014 after second attempt. Completion of the ERL returning loop components installation is scheduled for April 2015 following full power ERL commissioning. After ERL commissioning in BLDG912 the ERL will be relocated to RHIC IP2 to be used as low energy RHIC electron cooler.
* D.Kayran et al., First test results from SRF photoinjector for the R&D ERL at BNL, IPAC'14, pp. 748-750
 
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TUICLH1027
Characterization of Multi-alkali Antimonide Cathode at Cryogenic Temperatures and its Performance in SRF Gun  
 
  • H.M. Xie
    PKU, Beijing, People's Republic of China
  • S.A. Belomestnykh, I. Ben-Zvi, D. Kayran, G.T. McIntyre, B. Sheehy, R. Than, E. Wang, D. Weiss, W. Xu
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
An alkali antimonide photocathode was tested in BNL 704 MHz SRF gun. The cathode QE and lifetime were measured inside the gun. We also observed a reduction on the QE upon cooling down to cryogenic temperature. In this paper, we propose an analytical model and present a Monte-Carlo simulation code to explain this QE decrease. Both results compared with experiments. Effect of cooling the cathode to cryogenic temperature and Schottky effect on QE will be discussed.
 
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