https://doi.org/10.1140/epjc/s10052-021-09879-y
Regular Article - Experimental Physics
Exploration of grid scheme for Frisch-grid ionization chamber
1
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
2
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, 100049, Beijing, China
3
North China University of Water Resources and Electric Power, 450000, Zhengzhou, China
4
Department of Physics, Tsinghua University, 100084, Beijing, China
5
School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China
6
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, China
7
Joint Department for Nuclear Physics, Lanzhou University and Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
8
Research Center for Nuclear Physics, Osaka University, 567-0047, Ibaraki, Osaka, Japan
Received:
31
August
2021
Accepted:
24
November
2021
Published online:
10
December
2021
A new Frisch-grid ionization chamber has been built to explore the appropriate choice of Frisch-grid. Detailed studies of the relationship between grid geometries and detector performance have been performed with an 
Am source. This paper describes and compares the energy resolution of ionization chambers with parallel-wire and mesh grids of different grid parameters. Some specific recommendations for grid selection are provided based on the data currently available. To obtain optimal energy resolution, the operating voltage of the chamber must satisfy the condition of minimum electron collection on the grid with distinct geometries and parameters, respectively. Since there is no established theory applicable to both types of grids, we have devised a careful simulation procedure incorporating the COMSOL and Garfield++ codes to search for the conditions of the minimum electron collection on the grid. The simulation results fit the experimental data well, suggesting that this simulation method successfully predicts the suitable voltage setting when using a mesh grid or parallel wires grid as the shielding electrode.
© The Author(s) 2021
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