1.2MV“天蝎”X光机杆箍缩二极管性能模拟 |
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引用本文: | 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. DOI: 10.11884/HPLPB201527.095005 |
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作者姓名: | 王宇 李洪涛 王文斗 邓建军 刘金峰 马成刚 |
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作者单位: | 1.中国工程物理研究院 研究生部, 四川 绵阳 621 900; |
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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。
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关 键 词: | 杆箍缩二极管 脉冲功率 辐射成像 蒙特卡罗模拟 阻抗 |
收稿时间: | 2015-05-27 |
Simulation study on performances of rod-pinch diode on 1.2 MV X-ray generator Scorpio |
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Affiliation: | 1.Graduate School of China Academy of Engineering Physics,Mianyang 621900,China;2.Institute of Fluid Physics,CAEP,Mianyang 621900,China |
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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. |
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