CERN Accelerating science

Article
Title	Photoemission Studies on BNL/AES/JLab all Niobium, Superconducting RF Injector
Author(s)	Rao, Triveni ; Ben-Zvi, Ilan ; Burrill, Andrew ; Cole, Michael ; Hahn, Harald ; Kayran, Dmitry ; Kneisel, Peter ; Zhao, Yongxiang
Affiliation	(AES, Medford, NY) ; (BNL, Upton, Long Island, New York) ; (Jefferson Lab, Newport News, Virginia)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2556
Subject category	Accelerators and Storage Rings
Abstract	Photoemission from all niobium superconducting injector is of considerable interest for the development of higher average current electron sources. In the past year, we have generated photocurrent from such an injector by irradiating the back wall of the 1/2 cell cavity with 248 nm and 266 nm laser beams. In this paper, we present the results of these measurements including the quantum efficiency, and its dependence on the field and wavelength. Issues related to the quenching of the cavity by the laser radiation will also be addressed.