90006050

open access

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Prototype analog front-end for negative-ion gas and dual-phase liquid-Ar TPCs

English (英語)

Journal of Instrumentation

14

T01008-T01008

IOP Publishing

2019-01

2019-06-05

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 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 Cdet ≈ 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.

Gaseous imaging and tracking detectors

学術雑誌論文

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