研究目的
Development of a photocathode dc gun for a compact Smith-Purcell free-electron laser in the terahertz wavelength region.
研究成果
A photocathode dc gun was developed for the SP FEL experiment, achieving a high-current beam generation. However, a well-prepared beam monitor system is necessary to prevent vacuum incidents.
研究不足
The operational voltage was limited due to field emission generated from the cathode electrode, and a vacuum incident occurred during high-current beam transport.
The methodology for designing the experiment includes the development of a photocathode dc gun system consisting of an alkali antimonide photocathode preparation chamber, a dc gun with a high-voltage power supply, and a downstream beamline with a water-cooled beam dump. The experimental procedures involve the fabrication of a Cs3Sb photocathode, generation of a high-current beam, and installation of a vacuum chamber for the Smith-Purcell free-electron laser.
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