Space-Charge Limitation of a Femtosecond Photoinjector
Space-Charge Limitation of a Femtosecond Photoinjector
复制标题
飞秒光注入器的空间电荷限制
DOI：
10.1155/2011/714265
复制
发表时间：
2011
影响因子：
1.7
通讯作者：
Makoto R.Asakawa
中科院分区：
文献类型：
--
作者：
Hiroko Yamamoto;Hiroaki Hamabe;Shintaro Sone;Soichiro Yamaguchi;Makoto R.Asakawa
对100 fs激光脉冲驱动的40 kV小型二极管型光电直流电子枪的实验研究表明，空间电荷限制电流密度可超过30 kA/cm 2，且电流密度随加速电压线性增加。我们通过阴极表面场和阴极表面附近片状电子聚束产生的场之间的平衡来解释这些重要性质。我们简单的物理模型与实验结果吻合得很好。
Experimental investigation of a compact 40‐kV diode‐type photoelectric DC gun driven by 100 fs laser pulses revealed that the space‐charge‐limited current density could exceed 30 kA/cm2and that the density increased linearly with the accelerating voltage. We explained these important properties by the balance between the cathode surface field and the field produced by sheet‐like electron bunches near the cathode surface. Our simple physical model agreed well with the experimental results.