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

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 Xie; A Zaltsman

doi:10.1063/1.4962682

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

Rev Sci Instrum. 2016 Sep;87(9):093303. doi: 10.1063/1.4962682.

Authors

T Xin¹, J C Brutus¹, Sergey A Belomestnykh¹, I Ben-Zvi¹, C H Boulware², T L Grimm², T Hayes¹, Vladimir N Litvinenko¹, K Mernick¹, G Narayan¹, P Orfin¹, I Pinayev¹, T Rao¹, F Severino¹, J Skaritka¹, K Smith¹, R Than¹, J Tuozzolo¹, E Wang¹, B Xiao¹, H Xie³, A Zaltsman¹

Affiliations

¹ Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
² Niowave, Inc., Lansing, Michigan 48906, USA.
³ Peking University, Beijing, China.

PMID: 27782552
DOI: 10.1063/1.4962682

Abstract

High-bunch-charge photoemission 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-alkali photocathodes for generating electrons.