摘要
通过适当地改造2 MeV注入器实验平台,使系统具备了开展光阴极研究的能力,主要的改动有:将观察窗材料改为石英,增加266 nm固体激光器,对原有的时序控制方式进行修改以满足同步触发方面的要求。研究的阴极材料为含钪储备式热阴极,实验中最高加热到了740℃,观测到了光电发射和光致等离子体发射现象,最大的激光功率密度为1.3 MW/cm2,最大发射电流密度约为16 A/cm2,光电发射的量子效率约为0.05‰。
A modified 2 MeV injector was used to study the photocathode for linear induction accelerators, which adopted a frequency-quadrupled Nd：YAG laser （266 nm） and a quartz window. Its trigger system was improved to realize output synehronization between the pulsed power system and the laser. A scandate cathode was investigated and the maximal cathode temperature was about 740℃ in the experiments. Photoemission and plasma emission caused by laser were observed. The maximal laser power density was about 1.3 MW/cm^2 , the maximal emission current density was about 16 A/cm^2 , and the quantum efficiency of photoemission was about 0.05‰.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2010年第3期583-586,共4页
High Power Laser and Particle Beams
基金
国防科技基础研究基金项目
