Studies of THGEM-based detector at low-pressure Hydrogen/Deuterium, for AT-TPC applications
Studies of THGEM-based detector at low-pressure Hydrogen/Deuterium, for AT-TPC applications
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DOI：
10.1088/1748-0221/2015/09/p09020
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发表时间：
2015-11
影响因子：
1.3
通讯作者：
M. Cortesi;J. Yurkon;W. Mittig;D. Bazin;S. Beceiro-Novo;A. Stolz
中科院分区：
文献类型：
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作者：
M. Cortesi;J. Yurkon;W. Mittig;D. Bazin;S. Beceiro-Novo;A. Stolz
我们研究了单厚度和双厚度气体电子倍增器（THGEM）探测器在100-450 Ω范围内的低压纯氢（H2）和氘（D2）中的性能。研究了单、双级联探测器中压强对最大增益、离子回流和长期增益稳定性的影响。特别是，人们发现，最大可实现的增益高于104，从单光电子雪崩，可以实现的压力为200埃以上;较低的压力的增益被雪崩引起的二次效应限制在103左右的值。本工作的结果在低压、低质量惰性气体雪崩机制领域中是相关的，特别是在核物理和核天体物理领域中用于有源靶时间投影室（TPC）的THGEM端盖读出的应用。
We study the performance of single- and double- THick Gas Electron Multiplier (THGEM) detectors in pure Hydrogen (H2) and Deuterium (D2) at low pressures, in the range of 100–450 torr. The effect of the pressure on the maximum achievable gain, ion-back flow and long-term gain stability are investigated for single and double cascade detectors. In particular, it was found that maximum achievable gains above 104, from single-photoelectrons avalanche, can be achieved for pressures of 200 torr and above; for lower pressure the gains are limited by avalanche-induced secondary effects to a values of around 103. The results of this work are relevant in the field of avalanche mechanism in low-pressure, low-mass noble gases, in particular for applications of THGEM end-cap readout for active-target Time Projection Chambers (TPC) in the field of nuclear physics and nuclear astrophysics.