Details

Autor(en) / Beteiligte

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

Titel

Gain stabilization in Micro Pattern Gaseous Detectors: methodology and results

Ist Teil von

• Journal of instrumentation, 2017-09, Vol.12 (9), p.P09036-P09036

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.