Analytical model and simulation of the Schottky effect on a cryocooled bialkali photocathode  

作　　者：Hua-Mu Xie Er-Dong Wang Ke-Xin Liu 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,Institute of Heavy Ion Physics,Peking University,Beijing 100871,China [2]Brookhaven National Laboratory,Upton,NY 11973,USA

出　　处：《Nuclear Science and Techniques》2018年第5期82-86,共5页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.11775008)

摘　　要：A bialkali photocathode with the quantum efficiency(QE) in the range of a few percent was fabricated for the 704 MHz SRF gun at Brookhaven National Laboratory. The photoemission properties of the bialkali photocathode in the superconducting radio frequency(SRF)gun were measured for the first time, and a good beam experiment result was obtained. The performance of the bialkali photocathode was investigated during the commissioning process of the 704 MHz SRF gun. The effect of electric field on the QE of the cryo-cooled cathode was characterized by an analytical model and a code for the first time.A bialkali photocathode with the quantum efficiency(QE) in the range of a few percent was fabricated for the 704 MHz SRF gun at Brookhaven National Laboratory. The photoemission properties of the bialkali photocathode in the superconducting radio frequency(SRF)gun were measured for the first time, and a good beam experiment result was obtained. The performance of the bialkali photocathode was investigated during the commissioning process of the 704 MHz SRF gun. The effect of electric field on the QE of the cryo-cooled cathode was characterized by an analytical model and a code for the first time.

关 键 词：SCHOTTKY effect Bialkali PHOTOCATHODE Surface potential SUPERCONDUCTING RADIO FREQUENCY GUN 

分 类 号：TL[核科学技术]