Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (1): 11 doi: 10.1007/s41365-019-0716-x


Simulation and prototype testing of multi-wire drift chamber arrays for the CEE

Li-Ming Lyu 1, Han Yi 1, Li-Ming Duan 1, Zhao Zhang 2, Zhi-Gang Xiao 1   

  1. 1Department of Physics, Tsinghua University, Beijing 100084, China
    2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2019-02-12 Revised:2019-10-01 Accepted:2019-11-05
  • Contact: Li-Ming Lyu
  • Supported by:
    This work was supported by the National Basic Research Program of China (973) (No. 2015CB856903) and the National Science Foundation of China (No. U1332207).
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Li-Ming Lyu, Han Yi, Li-Ming Duan, Zhao Zhang, Zhi-Gang Xiao. Simulation and prototype testing of multi-wire drift chamber arrays for the CEE.Nuclear Science and Techniques, 2020, 31(1): 11     doi: 10.1007/s41365-019-0716-x

Abstract: The building of a large-scale external-target experiment, abbreviated as CEE, in the cooling storage ring (CSR) at the Heavy Ion Research Facility in Lanzhou (HIRFL) has been planned. The CEE is a multi-purpose spectrometer that will be used for various studies on heavy-ion collisions. A multi-wire drift chamber (MWDC) array is the forward tracking detector of the CEE. In this work, GEANT4 simulations were performed for the MWDC forward tracking array with a focus on the track reconstruction algorithm. Combined with the time of flight information, particle identification is achieved. The residue is about 30 μm, while the tracking efficiency is higher than 90 % with the current redundancy. In addition, a prototype of the forward tracking system using three MWDCs was assembled and tested using a high energy proton beam. The firing efficiency of the detector and the reconstruction accuracy of the prototype were derived. The track residue for the protons at about 400 MeV/c is better than 300 μm, meeting the requirements of the CEE. Suggestions for improving the performance of the forward tracking system are given.

Key words: CEE, Multi-wire drift chamber array, Track finding and reconstruction