WEXC6

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URL	https://doi.org/10.18429/JACoW-SAP2025-WEXC6
Title	Beam extraction and dark current study of a C-band RF photo gun
Authors	X. Liu, J. Zhu China Spallation Neutron Source, Institute of High Energy Physics, Chinese Academy of Sciences S. Jiang, S. Liu, X. Li Institute of High Energy Physics, Chinese Academy of Sciences H. Zhang Dongguan Neutron Science Center, Institute of High Energy Physics, Chinese Academy of Sciences
Abstract	C-band RF photo gun is being developed worldwide for better electron bunch emittance, aiming to be used in advanced light sources such as diffraction-limited storage rings and free electron lasers. Initial beam tests of a 3.6-cell C-band RF photo gun achieved 6.6 MeV beam energy at 137 MV/m cathode gradient were conducted, along with high dark current; Surface checks revealed electron damage on cathodes and disk apertures after these tests. To understand and suppress the dark current, surface cleaning methods and preliminary numerical simulations have also been conducted, and the results are discussed.
Paper	download: WEXC6.pdf
Cite	BibTeX, LaTeX, Text/Word, RIS, EndNote
Conference	15th Symposium on Accelerator Physics
Series
Location	Urumqi, China
Date	02-05 Sep 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Lin Bian - Editor in Chief (IHEP), Zhichu Chen (SARI), Fancong Zeng (IHEP).
Online ISBN	978-3-95450-279-0
Online ISSN	3043-0208
Received	20 October 2025
Revised	10 November 2025
Accepted	11 November 2025
Issued	09 March 2026
DOI	10.18429/JACoW-SAP2025-WEXC6
Pages	9-11
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.