3 years ago

Measurements of charging-up processes in THGEM-based particle detectors.

A. Breskin, D. Shaked Renous, P. M. M. Correia, S. Bressler, J. F. C. A. Veloso, M. Pitt, A. E. C. Coimbra, C. D. R. Azevedo

The time-dependent gain variation of detectors incorporating Thick Gas Electron Multipliers (THGEM) electrodes was studied in the context of charging-up processes of the electrode's insulating surfaces. An experimental study was performed to examine model-simulation results of the aforementioned phenomena, under various experimental conditions. The results indicate that in a stable detector's environment, the gain stabilization process is mainly affected by the charging-up of the detector's insulating surfaces caused by the avalanche charges. The charging-up is a transient effect, occurring during the detector's initial operation period; it does not affect its long-term operation. The experimental results are consistent with the outcome of model-simulations.

Publisher URL: http://arxiv.org/abs/1801.00533

DOI: arXiv:1801.00533v2

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