Prototype Analog Front-end for Negative-ion Gas and Dual-phase Liquid-Ar TPCs
Prototype Analog Front-end for Negative-ion Gas and Dual-phase Liquid-Ar TPCs
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适用于负离子气体和双相液态氩 TPC 的原型模拟前端
DOI：
10.1088/1748-0221/14/01/t01008
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
M.Nakazawa 他
中科院分区：
文献类型：
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作者：
後藤 良輔;吉田 純也;Myint Kyaw Soe;Aye Moh Moh Theint;Go Sian Huai;仲澤 和馬;Ajimura S. et. al;Yohei Yamamoto;Takashi Nakamura;M.Nakazawa 他
我们报告了最近开发的一种多功能模拟前端，该前端与负离子μ-TPC兼容，用于定向暗物质搜索，以及双相，下一代Script O（10 kt）液氩TPC，用于研究中微子振荡，核子衰变和天体物理中微子。虽然负离子和液态氩TPC的工作条件有很大的不同（分别是室温和1088 K工作），但读出电子器件的要求是相似的。两者都要求高达1600 fC的宽动态范围，以及对于80 fC的典型信号，小于2000-5000 e−噪声，检测器电容为C det = 300 pF。为了满足这些具有挑战性的要求，采用180 nm CMOS技术新设计了原型ASIC。在这里，我们报告的ASIC的性能，包括整形时间，动态范围和等效噪声电荷（ENC）的测量。我们还展示了该ASIC在低压负离子μ-TPC上的首次操作。
We report on the recent development of a versatile analog front-end compatible with a negative-ion μ-TPC for a directional dark matter search as well as a dual-phase, next-generation Script O (10 kt) liquid argon TPC to study neutrino oscillations, nucleon decay, and astrophysical neutrinos. Although the operating conditions for negative-ion and liquid argon TPCs are quite different (room temperature vs.∼ 88 K operation, respectively), the readout electronics requirements are similar. Both require a wide-dynamic range up to 1600 fC, and less than 2000–5000 e− noise for a typical signal of 80 fC with a detector capacitance of C det≈ 300 pF. In order to fulfill such challenging requirements, a prototype ASIC was newly designed using 180-nm CMOS technology. Here, we report on the performance of this ASIC, including measurements of shaping time, dynamic range, and equivalent noise charge (ENC). We also demonstrate the first operation of this ASIC on a low-pressure negative-ion μ-TPC.