叠片法测量脉冲X射线源焦斑  

Spot size measurement for pulsed X-ray source with lamination method

作　　者：高屹[1,2] 马继明[2] 张众[2] 张鹏飞[2] 孙江[2] 王志国[2] 尹佳辉[2] 梁天学[2] 杜泰斌[1] 

机构地区：[1]清华大学,工程物理系,北京100084 [2]西北核技术研究所,西安710024

出　　处：《强激光与粒子束》2010年第12期3057-3061,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10775112)

摘　　要：介绍了叠片法测量脉冲X射线源焦斑的原理。对确定结构和尺寸的金属、薄膜叠片及测试系统布局,数值计算了叠片法的空间分辨及对均匀分布线光源的输出响应,得到响应曲线半高宽与焦斑尺寸的对应关系。计算结果表明,叠片法不适用于测量小于2 mm的焦斑。在感应电压叠加器上开展了阳极杆箍缩二极管实验,采用叠片法测量二极管X射线源轴向焦斑,与针孔照相结果基本相符,说明叠片法可用于脉冲X射线源焦斑尺寸测量。The principle of pulsed X-ray spot size measurement with lamination method was presented. The spatial resolution and output response for uniformly distributed line source of the metal-film lamination were calculated numerically. The corresponding relation between the FWHM of the response curve and the spot size was obtained. And the calculation results indicate that the metal-film lamination is not suitable for measurement of spot size less than 2 mm. Rod-pinch diode(RPD) experiments were performed on the inductive voltage adder, and the axial extent of the RPD X-ray source was measured with lamination method. Under the hypothesis of uniformly distributed line source, the axial spot size of the X-ray source was obtained, about 5. 2 mm, consistent with the measuring result of the pinhole camera, which verifies the suitability of lamination method for pulsed X-ray spot size measurement.

关 键 词：叠片法 尺寸测量 脉冲 射线源 焦斑尺寸 X-RAY size measurement 杆箍缩二极管 响应曲线 系统布局 数值计算 输出响应 确定结构 空间分辨 均匀分布 计算结果 感应电压 对应关系 线光源 半高宽 

分 类 号：O4[理学—物理]