Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (07): 70201-070201.

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS •

### Influence of working gas on the properties of boron-coated MRPC thermal neutron detector by Garfield simulation

SHAN Qing ZENG Jie JIA Wenbao LING Yongsheng HEI Daqian WEI Yonghong ZHANG Yan

1. (College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
• Received:2013-10-21 Revised:2013-12-27 Online:2014-07-10 Published:2014-07-07

Abstract: Background: Multi-gap Resistive Plate Chamber (MRPC) is a kind of gas detector developed in 1995. Purpose: For its excellent time resolution and high efficiency, MRPC is used to detect thermal neutron by coating boron on the inner glass. Methods: The performances of the boron-coated MRPC thermal neutron detector are largely affected by the component or proportion of the working gas, so it is important to optimize the proportion of working gas. Then Garfield was used to simulate the gas parameter, such as Townsend coefficient ?, electron attachment coefficient ?, drift velocity v and diffusion coefficient D. Results: The time resolution ?t and detection efficiency ? of MRPC were calculated. Conclusion: Through the simulation, the proportion of working gas is optimized to provide necessary guidance for the fabrication of the detector.