Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (8): 80403-080403.doi: 10.11889/j.0253-3219.2018.hjs.41.080403


Prototype of neutron sensitive MWPC detector with delay-line readout

HE Yuefeng1,2,3, WANG Yanfeng2,3, ZHAO Yingtan2,3,4, FAN Ruirui2,3, MA Changli2,3, GONG Xueyu1, SUN Zhijia2,3, CAO Ping5, YU Li5, ZHENG Manyu5, ZHANG Ying6   

  1. 1. University of South China, Hengyang 241001, China;
    2. State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
    3. Dongguan Institute of Neutron Science, Dongguan 523808, China;
    4. Xi'an Jiaotong University, Xi'an 710049, China;
    5. University of Science and Technology of China, Hefei 230026, China;
    6. Key Laboratory of Neutron Physics of China Academy of Engineering Physics, Institute of Nuclear Physics and Chemistry, Mianyang 621900, China
  • Received:2017-08-16 Revised:2018-01-25 Online:2018-08-10 Published:2018-08-15
  • Supported by:
    Supported by State Key Laboratory of Particle Detection and Electronics (No.Y61614306A), Key Laboratory of Neutron Physics of China Academy of Engineering Physics (No.Y71123005B), National Natural Science Foundation of China (No.Y6281120K2)

Abstract: [Background] A neutron sensitive multi-wire proportional chamber (MWPC) is one of important components for the CSNS's (China spallation neutron source) construction.In terms of large-area neutron detectors, the delay-line readout method is a new type of signal readout method.[Purpose] This study aims to design and implement a 200mm×200mm sensitive area MWPC prototype with a delay-line readout system to verify the feasibility of the delay-line readout method.[Methods] An unified anode readout and two channel for each cathode signal are implemented with the MWPC. At first we put α radiation sources in three different positions of the neutron detector, the position information of the incident particle what these sources scattering into the detector contained by the induced signal in cathode. After avalanche, spreads through a series of 5ns modules to the opposite ends, a high precision time to digital converter (TDC) is employed for determining arrival time, from which the incident position can be derived. Finally, the root software is used for data analysis so as to verify the position performance of this MWPC.[Results] The preliminary results with the α radiation source testing showed the position resolution is better than 2 mm which achieved by this proposed MWPC.[Conclusion] The developed MWPC detector can successfully perform position measurement. Meanwhile, it is good to verify the feasibility of the delay-line readout method in the measurement of large-area neutron detectors.

Key words: Multi-wire proportional chamber, Delay module readout, Position measurement

CLC Number: 

  • TL99