The current status of the Gas Electron Multiplier (GEM) research at Kasetsart University, Thailand

International Nuclear Science and Technology Conference 2016

Kumpiranon, P.^1 ; Kulasri, K.^1 ; Rittirong, A.^1 ; Saenboonruang, K.^1

Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Chatuchak, Bangkok

10900, Thailand^1

关键词: Faculty of science;    Fast-neutron detection;    Gas electron multipliers;    Neutron converters;    Neutron detection;    Relative efficiency;    Testing procedure;    Thermal-neutron detection;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/860/1/012019/pdf
DOI  :  10.1088/1742-6596/860/1/012019

来源: IOP

【 摘 要 】

During the past decade, Gas Electron Multiplier (GEM) detectors have been greatly developed and utilized in numbers of applications including advanced nuclear and particle researches, medical imaging, astrophysics, and neutron detection for national security. Our GEM research group at the Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Thailand, realized in its excellent properties/potentials and started extensive researches on GEM detectors. To build a strong foundation on our research group, two 10 cm 10 cm triple GEM detectors were characterized on their important properties including absolute gains and detection uniformity. Moreover, to widen applications of the GEM detector, our group had modified the GEM detector by introducing either solid or gaseous neutron converters to the detector so that the detector could effectively detect neutrons. These modifications included coating a thin film of10B andnatB to the GEM drift cathode for thermal neutron detection and flowing a gas mixture of He/CO2(80:20 and 70:30) and C4H10/He/CO2(7:70:23) for fast neutron detection. Results showed that the modified GEM-based neutron detector could detect both types of neutrons with different relative efficiencies and gains depending on thicknesses and types of neutron converters. This article discusses basic knowledge of the GEM detector, construction and testing procedures, results, and discussion.