| 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. |
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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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| Institution: | 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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