Neutron beam monitor based on a boron-coated GEM

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...

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Published inChinese physics C Vol. 35; no. 7; pp. 668 - 674
Main Author 周健荣 孙志嘉 刘贲 王艳凤 杨桂安 周良 许虹 董静 杨雷 李仪
Format Journal Article
LanguageEnglish
Published 01.07.2011
Subjects
Aluminum
Beams (radiation)
Channels
Enrichment
Foils
Monitors
Neutron beams
Neutron sources
中子束
中子源
创业板
成像能力
气体电子倍增器
监视器
硼10
表面涂层
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/35/7/012

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Summary: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 of 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 of source ^239pu is presented, which shows that the neutron beam monitor based on a boron-coated GEM has a good two-dimensional imaging ability.
Bibliography:11-5641/O4
ZHOU Jian-Rong SUN Zhi-Jia LIU Ben WANG Yan-Feng YANG Gui-An ZHOU Liang XU Hong DONG Jing YANG Lei LI Yi（ 1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China ; 2 Dongguan University of Technology, Dongguan 523808, China ;3 Huazhong Normal University, Wuhan 430079, China）
boron-coated, GEM, neutron beam monitor, spallation neutron source
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 of 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 of source ^239pu is presented, which shows that the neutron beam monitor based on a boron-coated GEM has a good two-dimensional imaging ability.
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content type line 23
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/35/7/012