Time Dependent DD Neutrons Measurement Using a Single Crystal Chemical Vapor Deposition Diamond Detector on EAST

DU Tengfei (杜腾飞); PENG Xingyu (彭星宇); CHEN Zhongjing (陈忠靖); HU Zhimeng (胡志猛); GE Lijian (葛理健); HU Liqun (胡立群); ZHONG Guoqiang (钟国强); PU Neng (普能); CHEN Jinxiang (陈金象); FAN Tieshuan (樊铁栓)

doi:10.1088/1009-0630/18/9/12

Plasma Science and Technology > 2016 > 18(9): 950-953. > DOI: 10.1088/1009-0630/18/9/12

DU Tengfei (杜腾飞), PENG Xingyu (彭星宇), CHEN Zhongjing (陈忠靖), HU Zhimeng (胡志猛), GE Lijian (葛理健), HU Liqun (胡立群), ZHONG Guoqiang (钟国强), PU Neng (普能), CHEN Jinxiang (陈金象), FAN Tieshuan (樊铁栓). Time Dependent DD Neutrons Measurement Using a Single Crystal Chemical Vapor Deposition Diamond Detector on EAST[J]. Plasma Science and Technology, 2016, 18(9): 950-953. DOI: 10.1088/1009-0630/18/9/12

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Time Dependent DD Neutrons Measurement Using a Single Crystal Chemical Vapor Deposition Diamond Detector on EAST

1 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China 2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by the National Magnetic Confinement Fusion Science Program of China (Nos. 2013GB106004 and 2012GB101003) and National Natural Science Foundation of China (No. 91226102)

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Received Date: September 14, 2015

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Abstract

Abstract

A single crystal chemical vapor deposition (scCVD) diamond detector has been successfully employed for neutron measurements in the EAST (Experimental Advanced Superconducting Tokamak) plasmas. The scCVD diamond detector coated with a 5 µm ⁶LiF (95% ⁶Li enriched) layer was placed inside a polyethylene moderator to enhance the detection efficiency. The time-dependent neutron emission from deuteron plasmas during neutral beam injection (NBI) heating was obtained. The measured results are compared with that of fission chamber detectors, which always act as standard neutron flux monitors. The scCVD diamond detector exhibits good reliability, stability and the capability to withstand harsh radiation environments despite its low detection efficiency due to the small active volume.
- scCVD diamond detector,
- neutron measurement,
- EAST

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