γ射线二极管寿命提升关键技术实验研究

Experimental Research on Lifetime of γ-ray Diode for Reutilization

摘要: 本文通过分析γ射线二极管的物理过程，对二极管的阴阳极材料和结构进行了改进，并在强光一号装置上进行了实验验证。实验结果表明，通过采用深槽结构的黄铜阴极和多层阳极靶可显著降低强光一号装置二极管的阴极烧蚀、溅射沉积污染及阳极的热-力学损伤。改进后的阴极至少可重复使用3发次，阳极至少可重复使用4发次。实验结果为建设中的大面积脉冲γ射线辐射装置二极管的研制和实验效率提升提供了新技术途径。

Abstract: According to the physical property of γ-ray diode, the material and structure of electrode were developed and the new configuration of diode was explored on Qiangguang-Ⅰ facility. Experiment results show that the deeper-slot copper cathode and stacked tantalum anode effectively reduce cathode ablation, sputtering deposition pollution and anode thermal-dynamic damage. The lifetime-test experiment indicates that the deeper-slot copper cathode can be reused for 3 times and stacked tantalum anode can be reused for 4 times at least. All of these improvements can provide new technical ways for diode development and experimental efficiency of large area pulsed γ-ray radiation facility which is in construction.