First results of a large-area cryogenic gaseous photomultiplier coupled to a dual-phase liquid xenon TPC

L. Arazi, A. E.C. Coimbra, E. Erdal, I. Israelashvili, M. L. Rappaport, S. Shchemelinin, D. Vartsky, J. M.F. Dos Santos, A. Breskin

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We discuss recent advances in the development of cryogenic gaseous photomultipliers (GPM), for possible use in dark matter and other rare-event searches using noble-liquid targets. We present results from a 10 cm diameter GPM coupled to a dual-phase liquid xenon (LXe) TPC, demonstrating - for the first time - the feasibility of recording both primary (''S1'') and secondary (''S2'') scintillation signals. The detector comprised a triple Thick Gas Electron Multiplier (THGEM) structure with cesium iodide photocathode on the first element; it was shown to operate stably at 180 K with gains above 105, providing high single-photon detection efficiency even in the presence of large α particle-induced S2 signals comprising thousands of photoelectrons. S1 scintillation signals were recorded with a time resolution of 1.2 ns (RMS). The energy resolution (σ/E) for S2 electroluminescence of 5.5 MeV α particles was ∼ 9%, which is comparable to that obtained in the XENON100 TPC with PMTs. The results are discussed within the context of potential GPM deployment in future multi-ton noble-liquid detectors.

Original languageEnglish
Article numberP10020
JournalJournal of Instrumentation
Volume10
Issue number10
DOIs
StatePublished - 15 Oct 2015
Externally publishedYes

Keywords

  • Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)
  • Noble liquid detectors (scintillation, ionization, double-phase)
  • Photon detectors for UV, visible and IR photons (gas) (gas-photocathodes, solidphotocathodes)

ASJC Scopus subject areas

  • Mathematical Physics
  • Instrumentation

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