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High-brightness and high-repetition-rate thermionic electron gun for upgrade of a Japanese x-ray free-electron laser facility SACLA

Year: 2026
Type: article
Abstract: SACLA is a Japanese x-ray free-electron laser (XFEL) facility that has been operating for academic and industrial users. A pulsed high-voltage electron gun equipped with a thermionic cathode made of a single-crystal CeB6 has been used to deliver high-brightness electron beams required for XFEL operation. Recently, an upgrade plan for SACLA based on electron-source technologies was proposed. This plan emphasizes not only upgrading the repetition rate but also improving XFEL light quality. The strategy and progress toward developing an ultimate thermionic electron gun for the SACLA upgrade are described in this paper.
DOI: 10.1116/6.0005845
Authors: Kazuaki Togawa, Daisuke Satoh, Vitaliy Goryashko, Anatoliy Opanasenko, Tamotsu Magome, Makoto Kuwahara, Takafumi Ishida, Satoshi Yamamoto, Hitoshi Sugawara, Akitaka Yoshigoe, Yasutaka Tsuda, Shuichi Ogawa
Institutions: SPring-8, National Institute of Advanced Industrial Science and Technology, Uppsala University, Japan Synchrotron Radiation Research Institute, Nagoya University, Kobe University, Japan Atomic Energy Agency, Nihon University
Language: English
Open Access status: hybrid
Funder: RIKEN
OpenAlex ID: W7225388589
FWCI:
Cites: 33
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Related to: 10