Gain stabilization in Micro Pattern Gaseous Detectors: methodology and results

D. Shaked Renous, A. Roy, A. Breskin, S. Bressler

Research output: Contribution to journalArticlepeer-review


The phenomenon of avalanche-gain variations over time, particularly in Micro Pattern Gaseous Detectors (MPGD) incorporating insulator materials, have been generally attributed to electric-field modifications resulting from "charging-up" effects of the insulator. A robust methodology for characterization of gain-transients in such detectors is presented. It comprises three guidelines: detector initialization, long gain-stabilization monitoring and imposing transients by applying abrupt changes in operation conditions. Using THWELL and RPWELL detectors, we validated the proposed methodology by assessing a charging-up/charging-down model describing the governing processes of gain stabilization. The results provide a deeper insight into these processes, reflected by different transients upon abrupt variations of detector gain or the irradiation rate. This methodology provides a handle for future investigations of the involved physics phenomena in MPGD detectors comprising insulating components.

Original languageEnglish
Article number09036
Number of pages16
JournalJournal of Instrumentation
Issue number9
StatePublished - 29 Sep 2017


  • Avalanche-induced secondary effects
  • Charge transport and multiplication in gas
  • Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Mathematical Physics


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