| 聚乙烯-碘化铯中子阴极的最佳化 |
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| 引用本文： | 廖华,张焕文,李冀.聚乙烯-碘化铯中子阴极的最佳化[J].光子学报,1999,28(8):735-739. |
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| 作者姓名： | 廖华 张焕文 李冀 |
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| 作者单位： | 中国科学院西安光学精密机械研究所,光电子部,710068 |
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| 摘 要： | 本文的中子阴级由聚乙烯、导电基底(Al)和碘化铯二次电子发射体组成.文中建立了一个此中子阴级的新的物理模型,并采用Monte Carlo方法模拟了中子同阴极作用产生低能二次电子的物理过程.模拟得到的出射二次电子能谱和产额与实验结果和理论分析符合得较好.我们还得到了最大探测效率时各中子阴极组分的最佳厚度.
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| 关 键 词： | 中子阴极 Monte Carlo模拟 散射 |
| 收稿时间： | 1999-04-14 |
| 修稿时间： | 1999-04-14 |
THE OPTIMIZATION OF A POLYETHYLENE-CsI NEUTRON CATHODE |
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| Liao Hua,Zhang Huanwen,Li Ji.THE OPTIMIZATION OF A POLYETHYLENE-CsI NEUTRON CATHODE[J].Acta Photonica Sinica,1999,28(8):735-739. |
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| Authors: | Liao Hua Zhang Huanwen Li Ji |
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| Institution: | Xi’an Institute of Optics and Precision Mechanics, Academia Sinica, Xi’an 710068 |
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| Abstract: | A physical model of neutron cathode used to detect the neutron history in ICF is proposed The cathode consists of CsI deposited on a film of polyethylene (CH2) and a layer of Al is sandwiched between them The mechanism of secondary electron emission is simulated by means of Monte Carlo method The results of our calculation agree well with relevant experimental results and theory Also the cathode’s optimum thickness for the best detection efficiency and the initial energy distribution of the ejected electrons are obtained The optimum combinations of the cathode thickness are 1.7mm polyethylence,40μm Al,and 200nm CsI The initial energy distribution of the ejected electrons is 1.8eV(FWHM). |
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| Keywords: | Neutron Monte Carlo simulation Scattering |
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