期刊
PHYSICAL REVIEW ACCELERATORS AND BEAMS
卷 25, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevAccelBeams.25.083402
关键词
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资金
- U.S. DOE [DE-AC02-06CH11357, DE-SC0018656, DE-SC0022010]
- DOE SBIR [DE-SC0018709]
- U.S. Department of Energy (DOE) [DE-SC0022010, DE-SC0018709, DE-SC0018656] Funding Source: U.S. Department of Energy (DOE)
Radio-frequency photoemission electron guns operating at higher accelerating gradients can produce brighter electron bunches, which have the potential to revolutionize various scientific fields. By using short rf pulses in a new mode, researchers achieved an unprecedented high accelerating gradient in the experiment.
Radio-frequency (rf) photoemission electron guns operating at higher accelerating gradients offer a pathway to produce brighter electron bunches. Brighter beams are expected to revolutionize many areas of science: they could form the backbone of next-generation compact x-ray free-electron lasers or provide coherent ultrafast quantum electron probes. We report on the experimental demonstration of an rf photoemission electron source supporting an accelerating field close to 400 MV/m at the photocathode surface without major rf breakdown or significant dark current over a 3-week experimental run. This unprecedented gradient was achieved by operating the gun in a new regime with short rf pulses, similar to 9 ns X-band (11.7 GHz). The demonstrated paradigm provides a viable path to form relativistic electron beams with unprecedented brightness.
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