Neutron beam monitor based on a boron-coated GEM
Neutron beam monitor based on a boron-coated GEM
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DOI：
10.1088/1674-1137/35/7/012
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发表时间：
2011
影响因子：
3.6
通讯作者：
J. Zhou 周;Z. Sun 孙;Ben 贲 Liu 刘;Y. Wang 王;G. Yang 杨;L. Zhou 周;H. Xu 许;J. Dong 董;L. Yang 杨;Y. Li 李
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文献类型：
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作者：
J. Zhou 周;Z. Sun 孙;Ben 贲 Liu 刘;Y. Wang 王;G. Yang 杨;L. Zhou 周;H. Xu 许;J. Dong 董;L. Yang 杨;Y. Li 李
为满足新一代中子设施的需要，研制了一种新型热中子束监测仪，并配备了气体电子倍增器。用两个100 mm×100毫米的GEM箔构建了一个原型室。富集硼-10作为中子转换器涂覆在铝阴极板的一个表面。96通道垫与面积8 mm×8毫米每个用于快速信号读出。为了研究硼包覆GEM的基本特性，采用α源239Pu和中子源241Am（Be）进行了多次辐照试验。中子源诱导的信号具有较高的信噪比。在α源239Pu上获得了清晰的图像，表明基于硼包覆GEM的中子束监测仪具有良好的二维成像能力。
A new thermal neutron beam monitor with a Gas Electron Multiplier (GEM) is developed to meet the needs of the next generation of neutron facilities. A prototype chamber has been constructed with two 100 mm×100 mm GEM foils. Enriched boron-10 is coated on one surface of the aluminum cathode plate as the neutron convertor. 96 channel pads with an area of 8 mm×8 mm each are used for fast signal readout. In order to study the basic characteristics of a boron-coated GEM, several irradiation tests were carried out with α source 239Pu and neutron source 241Am(Be). The signal induced by the neutron source has a high signal-to-noise ratio. A clear image obtained from α source 239Pu is presented, which shows that the neutron beam monitor based on a boron-coated GEM has a good two-dimensional imaging ability.