Quantum Efficiencies of Mg Photocathode under Illumination with 3rd and 4th Harmonics Nd: LiYF4 Laser Light in RF Gun
Quantum Efficiencies of Mg Photocathode under Illumination with 3rd and 4th Harmonics Nd: LiYF4 Laser Light in RF Gun
复制标题
射频枪中 3 次和 4 次谐波 Nd:LiYF4 激光照射下镁光电阴极的量子效率
DOI：
10.1143/jjap.42.1470
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发表时间：
2003
影响因子：
1.5
通讯作者：
Y. Aoki
中科院分区：
文献类型：
--
作者：
T. Nakajyo;Jinfeng Yang;F. Sakai;Y. Aoki
采用热等静压结合金刚石抛光工艺制备了射频电子枪用镁光电阴极，并在57 MV/m的峰值电场下进行了测试。研究了镁阴极激光清洗工艺。在用262 nm和349 nm激光照射下测量激光清洁之前和之后的Mg阴极的量子效率（QE）。在262 nm激光照射下，获得了高达1.0×10-3的量子效率。在349 nm激光照射下，Mg阴极的量子效率为2.2×10-5。的QE上的电场的依赖关系进行了测量和比较，包括肖特基效应的理论分析。
A Mg photocathode for use in a radio-frequency gun was manufactured by a technique of hot isostatic pressing with diamond polishing and tested under a peak electric field of 57 MV/m. A laser cleaning process for the Mg cathode was developed. The quantum efficiency (QE) of the Mg cathode before and after the laser cleaning was measured under illumination with 262 nm and 349 nm laser light. A high QE of up to 1.0×10-3 was achieved under the 262 nm laser-light illumination. The QE of the Mg cathode under the 349 nm laser-light illumination was measured to be 2.2×10-5. The dependence of the QE on the electric field was measured and compared with a theoretical analysis including the Schottky effect.