Author: Minty, M.G.
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WEPNEC23
Experience With LEReC High Current DC Gun  
 
  • X. Gu, Z. Altinbas, D. Bruno, L. Cannizzo, M.R. Costanzo, A.V. Fedotov, D. Kayran, C.J. Liaw, M. Mapes, K. Mernick, C. Mi, T.A. Miller, M.G. Minty, J. Sandberg, L. Smart, P. Thieberger, J.E. Tuozzolo
    BNL, Upton, New York, USA
 
  Funding: Work was supported by Brookhaven Science Associates, LLC, under Contract No. DE-SC0012704 with the U.S. Department of Energy.
The Low Energy RHIC Electron Cooling (LEReC) ac-celerator was successfully commissioned at BNL. To satisfy the electron beam quality required for cooling, a high voltage DC photocathode gun was chosen as the electron source. The LEReC DC gun system is based on the Cornell University ERL gun. The gun was successfully commissioned with high-current and produced electron beam quality suitable for cooling. Here we describe operational experience with the LEReC gun, as well as experience gained with conditioning of such guns.
 
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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.
 
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