Neutron beam monitor based on a boron-coated GEM

ZHOU Jian-Rong; SUN Zhi-Jia; LIU Ben; WANG Yan-Feng; YANG Gui-An; ZHOU Liang; XU Hong; DONG Jing; YANG Lei; LI Yi

doi:10.1088/1674-1137/35/7/012

Chinese Physics C> 2011, Vol. 35> Issue(7) : 668-674 DOI: 10.1088/1674-1137/35/7/012

Neutron beam monitor based on a boron-coated GEM

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Abstract：
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.

References

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ZHOU Jian-Rong, SUN Zhi-Jia, LIU Ben, WANG Yan-Feng, YANG Gui-An, ZHOU Liang, XU Hong, DONG Jing, YANG Lei and LI Yi. Neutron beam monitor based on a boron-coated GEM[J]. Chinese Physics C, 2011, 35(7): 668-674. doi: 10.1088/1674-1137/35/7/012

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Received: 2010-09-15
Revised: 2011-01-26

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Neutron beam monitor based on a boron-coated GEM

Received Date: 2010-09-15

Accepted Date: 2011-01-26

Available Online: 2011-07-05

Abstract: 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.

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Neutron beam monitor based on a boron-coated GEM

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