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

J. F. C. A. Veloso; F. Amaro; J. M. Maia; A. V. Lyashenko; A. Breskin; R. Chechik; J. M. F. dos Santos; O. Bouianov; M. Bouianov

doi:10.1016/j.nima.2005.04.063

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

Instrumentation and Detectors 2009-11-11 v1

Authors: J. F. C. A. Veloso , F. Amaro , J. M. Maia , A. V. Lyashenko , A. Breskin , R. Chechik , J. M. F. dos Santos , O. Bouianov , M. Bouianov

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Abstract

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.

Keywords

gas-avalanche detectors micro-hole strip plate reversed-bias mode ion backflow gas electron multiplier effective gain

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@article{arxiv.physics/0503237,
  title  = {MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers},
  author = {J. F. C. A. Veloso and F. Amaro and J. M. Maia and A. V. Lyashenko and A. Breskin and R. Chechik and J. M. F. dos Santos and O. Bouianov and M. Bouianov},
  journal= {arXiv preprint arXiv:physics/0503237},
  year   = {2009}
}

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23 pages, 8 figures

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

Abstract

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