叠片法测量脉冲X射线源焦斑

高屹; 马继明; 张众; 张鹏飞; 孙江; 王志国; 尹佳辉; 梁天学; 杜泰斌

强激光与粒子束, 2010, 22 (12): 3057, 网络出版: 2011-01-05

叠片法测量脉冲X射线源焦斑

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

论文大纲

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

作者单位

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

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。

Abstract

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.

参考文献

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高屹, 马继明, 张众, 张鹏飞, 孙江, 王志国, 尹佳辉, 梁天学, 杜泰斌. 叠片法测量脉冲X射线源焦斑[J]. 强激光与粒子束, 2010, 22(12): 3057. Gao Yi, Ma Jiming, Zhang Zhong, Zhang Pengfei, Sun Jiang, Wang Zhiguo, Yin Jiahui, Liang Tianxue, Du Taibin. Spot size measurement for pulsed X-ray source with lamination method[J]. High Power Laser and Particle Beams, 2010, 22(12): 3057.

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