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arXiv · 1707.04356

Gain stabilization in Micro Pattern Gaseous Detectors: methodology and results

Dan Shaked Renous·Arindam Roy·Amos Breskin·Shikma Bressler
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Abstract

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.

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Dan Shaked Renous, Arindam Roy, Amos Breskin, Shikma Bressler. 2017-07-13. Gain stabilization in Micro Pattern Gaseous Detectors: methodology and results. https://doi.org/10.1088/1748-0221/12/09/p09036

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