3-D tracking in a miniature time projection chamber

被引:18
作者
Vahsen, S. E. [1 ]
Hedges, M. T. [1 ]
Jaegle, I. [1 ]
Ross, S. J. [1 ]
Seong, I. S. [1 ]
Thorpe, T. N. [1 ]
Yamaoka, J. [1 ]
Kadyk, J. A. [2 ]
Garcia-Sciveres, M. [2 ]
机构
[1] Univ Hawaii, Honolulu, HI 96322 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
关键词
TPC; GEM; Pixel; Directional; Neutron; Dark matter; DARK-MATTER DETECTOR; DRIFT; GEM; TPC; SIMULATION; READOUT; AMPLIFICATION; DIFFUSION; PIXELS; GASES;
D O I
10.1016/j.nima.2015.03.009
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The three-dimensional (3-D) detection of millimeter-scale ionization trails is of interest for detecting nuclear recoils in directional fast neutron detectors and in direction-sensitive searches for weakly interacting massive particles (WIMPs), which may constitute the Dark Matter of the universe. We report on performance characterization of a miniature gas target Time Projection Chamber (TPC) where the drift charge is avalanche-multiplied with Gas Electron Multipliers (GEMs) and detected with the ATLAS FE-I3 Pixel Application Specific Integrated Circuit (ASIC). We report on measurements of gain, gain resolution, point resolution, diffusion, angular resolution, and energy resolution with low-energy X-rays, cosmic rays, and alpha particles, using the gases Ar:CO2 (70:30) and He:CO2 (70:30) at atmospheric pressure. We discuss the implications for future, larger directional neutron and Dark Matter detectors. With an eye to designing and selecting components for these, we generalize our results into analytical expressions for detector performance whenever possible. We conclude by demonstrating the 3-D directional detection of a fast neutron source. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:95 / 105
页数:11
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