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arXiv · 2307.02343

The cryogenic RWELL: a stable charge multiplier for dual-phase liquid-argon detectors

A. Tesi·S. Leardini·L. Moleri·D. Gonzalez-Diaz·A. Jash·A. Breskin·S. Bressler
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Abstract

The operation of a cryogenic Resistive WELL (RWELL) in liquid argon vapor is reported for the first time. It comprises a Thick Gas Electron Multiplier (THGEM) structure coupled to a resistive Diamond-Like Carbon (DLC) anode deposited on an insulating substrate. The multiplier was operated at cryogenic temperature (90~K, 1.2~bar) in saturated argon vapor and characterized in terms of charge gain and electrical stability. A comparative study with standard, non-resistive THGEM (a.k.a LEM) and WELL multipliers, confirmed the RWELL advantages in terms of discharge quenching - thus superior gain and stability.

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A. Tesi, S. Leardini, L. Moleri, D. Gonzalez-Diaz, A. Jash, A. Breskin, S. Bressler. 2023-07-05. The cryogenic RWELL: a stable charge multiplier for dual-phase liquid-argon detectors. https://arxiv.org/abs/2307.02343

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