Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (5): 71 doi: 10.1007/s41365-018-0400-6

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Analytical model and simulation of the Schottky effect on a cryo-cooled bialkali photocathode

Hua-Mu Xie 1 • Er-Dong Wang 2 • Ke-Xin Liu 1   

  1. 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
  • Contact: Hua-Mu Xie E-mail:hmxie@pku.edu.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (No. 11775008).

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Hua-Mu Xie, Er-Dong Wang, Ke-Xin Liu. Analytical model and simulation of the Schottky effect on a cryo-cooled bialkali photocathode.Nuclear Science and Techniques, 2018, 29(5): 71     doi: 10.1007/s41365-018-0400-6

Abstract:

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.

Key words: Schottky effect, Bialkali photocathode, Surface potential, Superconducting radio frequency gun