photoemission dc gun;
Smith-Purcell radiation;
free-electron laser;
D O I:
10.3390/particles1010012
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We have developed a photocathode dc gun for a compact Smith-Purcell free-electron laser in the terahertz wavelength region. The gun system consists of an alkali antimonide photocathode preparation chamber, a dc gun with a 250 kV-50 mA Cockcroft-Walton high-voltage power supply, and a downstream beamline with a water-cooled beam dump to accommodate a beam power of 5 kW. We fabricated a Cs3Sb photocathode with quantum efficiency of 5.8% at a wavelength of 532 nm and generated a 150 keV beam with current of up to 4.3 mA with a 500 mW laser. A vacuum chamber for the Smith-Purcell free-electron laser has been installed in the downstream beamline. We describe the present status of our work.
机构:
School of Physics Science and Information Engineering,Liaocheng UniversitySchool of Physics Science and Information Engineering,Liaocheng University