Speaker
Gongxiaohui Chen
Description
A novel X-band (11.7 GHz) photoemission gun (Xgun), powered by short RF pulses (9 ns), has demonstrated unprecedented surface electric fields of approximately 400 MV/m on the photocathode. As a first step towards fully understanding the Xgun’s performance in the high-field regime, we focused on the fundamentals of photoemissions, including the impact of the Schottky effect, multipacting, and dark current emission. The characterization and benchmarking of electron emission for photocathode fields ranging from 60 MV/m to 320 MV/m are discussed. Additionally, we apply these simulations to the next-generation XRF gun being designed.
| Working group | WG5 : Beam sources, monitoring and control |
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Primary author
Co-authors
Alex Ody
(Argonne National Laboratory)
Charles Whiteford
(Argonne National Laboratory)
Chunguang Jing
(Euclid Techlabs)
Edgar Gomez
(Euclid Techlabs LLC)
Emily Frame
(Northern Illinois University)
Eric Wisniewski
(ANL)
Ernie Knight
(Euclid Techlabs LLC)
Gwanghui Ha
(NIU)
John Power
(Argonne National Lab)
Philippe Piot
(Argonne National Laboratory)
Roman Kostin
(Euclid Techlabs LLC)
Scott Doran
(ANL)
Seongyeol Kim
(Pohang Accelerator Laboratory)
Sergey Kuzikov
(Euclid Techlabs, LLC)
Wanming Liu
(HEP, ANL)
Xueying Lu
(Northern Illinois Univ / Argonne National Laboratory)