Novel resistive charge-multipliers for dual-phase LAr-TPCs: towards stable operation at higher gains

Abstract

Cryogenic versions of Resistive WELL (RWELL) and Resistive Plate WELL (RPWELL) detectors have been developed, aimed at stable avalanche multiplication of ionization electrons in dual-phase TPCs. In the RWELL, a thin resistive layer deposited on top of an insulator is inserted in between the electron multiplier (THGEM) and the readout anode; in the RPWELL, a resistive plate is directly coupled to the THGEM. Radiation-induced ionization electrons in the liquid are extracted into the gaseous phase. They drift into the THGEM's holes where they undergo charge multiplication. Embedding resistive materials into the multiplier proved to enhance operation stability due to the mitigation of electrical discharges - thus allowing operation at higher charge gain compared to standard THGEM (a.k.a. LEM) multipliers. We present the detector concepts and report on the main preliminary results.

References in corpus (8)

• DARWIN: towards the ultimate dark matter detector
• A concise review on THGEM detectors
• Liquid noble gas detectors for low energy particle physics
• Direct dark matter detection: the next decade
• Performance study of the effective gain of the double phase liquid Argon LEM Time Projection Chamber
• The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
• Electrical breakdown in Thick-GEM based WELL detectors
• Diamond-like carbon coatings for cryogenic operation of particle detectors

Cited by in corpus (1)

• Development of Fe${}_2$O${}_3$/YSZ ceramic plates for cryogenic operation of resistive-protected gaseous detectors