Cathode performance during two beam operation of the high current high polarization electron gun for eRHIC

Conference · Sun May 03 00:00:00 EDT 2015

OSTI ID:1188271

Rahman, O. ^[1]; Ben-Zvi, I. ^[1]; Degen, C. ^[1]; Gassner, D. M. ^[1]; Lambiase, R. ^[1]; Meng, W. ^[1]; Pikin, A. ^[1]; Rao, T. ^[1]; Sheehy, B. ^[1]; Skaritka, J. ^[1]; Wang, E. ^[1]; Pietz, J. ^[2]; Ackeret, M. ^[2]; Yeckel, C. ^[3]; Miller, R. ^[3]; Dobrin, E. ^[3]; Thompson, K. ^[3]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States)
2. Transfer Engineering and Manufacturing, Inc., Fremont, CA (United States)
3. Stangenes Industries, Palo Alto, CA (United States)

Two electron beams from two activated bulk GaAs photocathodes were successfully combined during the recent beam test of the High Current High Polarization Electron gun for eRHIC. The beam test took place in Stangenes Industries in Palo Alto, CA, where the cathodes were placed in diagonally opposite locations inside the high voltage shroud. No significant cross talking between the cathodes was found for the pertinent vacuum and low average current operation, which is very promising towards combining multiple beams for higher average current. This paper describes the cathode preparation, transport and cathode performance in the gun for the combining test, including the QE and lifetimes of the photocathodes at various steps of the experiment.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: SC00112704
• OSTI ID: 1188271
• Report Number(s): BNL-107441-2015-CP; R&D Project: KBCH139; KB0202011; TRN: US1500265
• Resource Relation: Conference: 6th International Particle Accelerator Conference (IPAC’15), Richmond, VA (United States), 3-8 May 2015
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ELECTRON BEAMS
PHOTOCATHODES
ELECTRIC CURRENTS
ELECTRON GUNS
GALLIUM ARSENIDES
TESTING
PERFORMANCE
SPIN ORIENTATION
LIFETIME
TRANSPORT
CHEMICAL ACTIVATION
BROOKHAVEN RHIC
QUANTUM EFFICIENCY