| 一个高灵敏度中子扫描变像管的设计 |
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| 引用本文： | 廖华,张焕文,郑志坚. 一个高灵敏度中子扫描变像管的设计[J]. 强激光与粒子束, 1999, 11(6): 720-724 |
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| 作者姓名： | 廖华 张焕文 郑志坚 |
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| 作者单位： | 1.中国科学院西安光学精密机械研究所，西安80号信箱4分箱710068;2.中物院核物理与化学研究所，四川绵阳919信箱 |
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| 摘 要： | 我们设计了一个高探测灵敏度的中子扫描变像管。该管采用电子产额较高的聚乙烯加碘化铯中子阴极。电子光学系统的主要特点是阴极面积大(f10mm)，不设置狭缝，电子束的交叉截面聚焦于MCP的前表面。预计此扫描变像管时间分辨率为43ps，可用于探测产额大于1×108个烧蚀靶内爆中子。当靶到阴极距离为几十厘米时，也可用于测量爆推靶内爆中子能谱多普勒展宽，从而确定等离子体离子温度。
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| 关 键 词： | 中子扫描变像管 时间分辨率 探测灵敏度 电子光学 |
| 文章编号： | 1001-4322(1999)06-0720-05 |
| 收稿时间： | 1900-01-01; |
| 修稿时间： | 1999-04-03 |
THE DESIGN OF A NEUTRON STREAK IMAGE TUBE WITH HIGH DETECTION EFFICIENCY |
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| LIAO Hua, ZHANG Huan-wen. THE DESIGN OF A NEUTRON STREAK IMAGE TUBE WITH HIGH DETECTION EFFICIENCY[J]. High Power Laser and Particle Beams, 1999, 11(6): 720-724 |
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| Authors: | LIAO Hua ZHANG Huan-wen |
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| Abstract: | A neutron streak image tube has been designed with high detection efficiency. The largearea photocathode (10 mm) consists of CsI on an Al foil, which is backed with a piece of polyethylene. Thetube has no slit and the cross-over of the electron beam is focused on the front surface of the MCP. The calculated time resolution is 43 ps for 14. 1 MeV neutrons. It is estimated that our tube can record signals fromthe implosion of DT-filled targets producing yields of 1 10~8 neutrons with a target to photocathode distanceof 5cm. The neutron streak image tube also can be used to determine the temperature of the plasma of theimplosion of DT-filled targets by measuring the Doppler broadening. |
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| Keywords: | neutron streak image tube time resolutions detection efficiency electron optics |
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