强激光与粒子束, 2015, 27 (9): 095005, 网络出版: 2015-11-30
1.2MV“天蝎”X光机杆箍缩二极管性能模拟
Simulation study on performances of rod-pinch diodeon 1.2 MV X-ray generator Scorpio
杆箍缩二极管 脉冲功率 辐射成像 蒙特卡罗模拟 阻抗 rod-pinch diode pulsed power radiography Monte-Carlo simulation impedance
摘要
为了深入研究杆箍缩二极管的物理性能,采用蒙特卡罗方法对中国工程物理研究院流体物理研究所1.2 MV“天蝎”X光机的杆箍缩二极管进行模拟研究,包括PIC模拟和光电子输运模拟。着重分析了杆箍缩二极管结构参数与阻抗及出光剂量等的关系,发现阻抗和出光剂量与阴阳极半径比正相关,而出光剂量和杆探出长度正相关。提出一种阻止阴极盘后表面发射电子的设想,有望显著提高X射线辐射剂量。
Abstract
The impedance and X-ray radiography states are the main references of rod-pinch diode. In order to study the physical performances of rod-pinch diode, a PIC and photoelectron transport simulation based on Monte Carlo is used to simulate the physics of the 1.2 MV X-ray generator Scorpio rod pinch diode at Institute of Fluid Physics, CAEP. The influence of structure parameters, including anode-cathode radius rate and anode rod stretching out length, on the diode impedance and radiography is given. The simulation results show good uniformity with theory and experiment. A model is proposed to increase the radiation dose rate, which might be applied in the future design of rod-pinch diode.
王宇, 李洪涛, 王文斗, 邓建军, 刘金峰, 马成刚. 1.2MV“天蝎”X光机杆箍缩二极管性能模拟[J]. 强激光与粒子束, 2015, 27(9): 095005. Wang Yu, Li Hongtao, Wang Wendou, Deng Jianjun, Liu Jinfeng, Ma Chenggang. Simulation study on performances of rod-pinch diodeon 1.2 MV X-ray generator Scorpio[J]. High Power Laser and Particle Beams, 2015, 27(9): 095005.