Development of a Multialkali Photocathode Dc Gun for a Smith-Purcell Terahertz Free-Electron Laser

被引：2
|
作者：
Nishimori, Nobuyuki [1 ]
Nagai, Ryoji [2 ]
Sawamura, Masaru [2 ]
Hajima, Ryoichi [2 ]
机构：
[1] Natl Inst Quantum & Radilol Sci & Technol, 1-1-1 Kouto Sayo Cho, Sayo, Hyogo 6795148, Japan
[2] Natl Inst Quantum & Radilol Sci & Technol, Tokai, Ibaraki 3191106, Japan
来源：
PARTICLES | 2018年 / 1卷 / 01期
关键词：
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.
引用
收藏
页码：166 / 174
页数：9
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