MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers

Details MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers

2005-03-31

arxiv.org/abs/physics/0503237v1

Nucl.Instrum.Meth. A548 (2005) 375-382

Physics

Instrumentation and Detectors

23 pages, 8 figures

Scientific paper

10.1016/j.nima.2005.04.063

We present recent results on the operation of gas-avalanche detectors comprising a cascade of gas electron multipliers (GEMs) and Micro-Hole and Strip Plates (MHSPs) multiplier operated in reversed-bias (R-MHSP) mode. The operation mechanism of the R-MHSP is explained and its potential contribution to ion-backflow (IBF) reduction is demonstrated. IBF values of 4E-3 were obtained in cascaded R-MHSP and GEM multipliers at gains of about 1E+4, though at the expense of reduced effective gain in the first R- MHSP multiplier in the cascade.

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