https://doi.org/10.1140/epjc/s10052-022-10953-2
Regular Article - Experimental Physics
New trapezoid-shaped Frisch-grid ionization chamber for low-energy particle measurements
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
School of Physics and Microeletronics, Zhengzhou University, 450001, Zhengzhou, China
8
Shanghai Advanced Research Institute, Chinese Academy of Sciences, 201210, Shanghai, China
9
Joint Department for Nuclear Physics, Lanzhou University and Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
10
Research Center for Nuclear Physics, Osaka University, 567-0047, Ibaraki, Osaka, Japan
Received:
29
August
2022
Accepted:
23
October
2022
Published online:
31
October
2022
A new trapezoid-shaped Frisch-grid ionization chamber (TFG-IC) has been built as a part of a 
telescope system for the detection and identification of charged particles at energies down to a few MeV. To study the effect of the drift electric field uniformity, two types of sealed windows, namely a pair of SSA (split-strip aluminized mylar film) and a pair of DSA (double-sided aluminized mylar film) sealed windows have been investigated. The detector’s performances were studied using a standard 
Am source at different gas pressures, and the total energy-deposit resolution achieved is about 1.1%(FWHM). The telescope, which was composed of TFG-IC and a DSSSD (double-sided silicon strip detector), has been tested using a three-component 
source and the Am source under laboratory conditions. The results show that the energy resolution with the SSA sealed windows which provide uniform drift electric field has a smaller fluctuation than that with the DSA ones; the fluctuations are about 1% and 4% for the former and the latter, respectively. Simulations using the COMSOL software also confirmed the electric-field distortion at the edge of the detector with the DSA windows. A correlation curve between energy resolution and energy deposit of charged particles at various gas pressures and for two gas species is derived for TFG-IC with the SSA sealed windows using the measurement with the Am source. Incorporating the above results, we performed Monte Carlo simulations to evaluate the particle-identification capability of the telescope. The results show that the telescope can be extended to the identification of low-energy particles.
© The Author(s) 2022
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