Design of a high-bunch-charge 112-MHz superconducting RF photoemission electron source

High-bunch-chargephotoemission electron-sources operating in a continuous wave (CW) mode are required for many advanced applications of particle accelerators, such as electron coolers for hadron beams, electron-ion colliders, and free-electron lasers.Superconducting RF (SRF) has several advantages over other electron-gun technologies in CW mode as it offers higher acceleration rate and potentially can generate higher bunch charges and average beam currents. A 112 MHz SRF electron photoinjector (gun) was developed at Brookhaven National Laboratory to produce high-brightness and high-bunch-charge bunches for the coherent electron cooling proof-of-principle experiment. The gun utilizes a quarter-wave resonator geometry for assuring beam dynamics and uses high quantum efficiency multi-alkaliphotocathodes for generating electrons.

Source: Review of Scientific Instruments - September 23, 2016 Category: Physics Authors: T. Xin, J. C. Brutus, Sergey A. Belomestnykh, I. Ben-Zvi, C. H. Boulware, T. L. Grimm, T. Hayes, Vladimir N. Litvinenko, K. Mernick, G. Narayan, P. Orfin, I. Pinayev, T. Rao, F. Severino, J. Skaritka, K. Smith, R. Than, J. Tuozzolo, E. Wang, B. Xiao, H. X Source Type: research