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Multi-GEM detectors in high particle fluxes

Thuiner, P. ; Resnati, F. ; Franchino, S. ; Diaz, D. Gonzalez ; Hall-Wilton, R. LU ; Muller, H. ; Oliveri, E. ; Pfeiffer, D. LU ; Ropelewski, L. and Van Stenis, M. , et al. (2018) In EPJ Web of Conferences 174.
Abstract

Gaseous Electron Multipliers (GEM) are well known for stable operation at high particle fluxes. We present a study of the intrinsic limits of GEM detectors when exposed to veiy high particle fluxes of the order of MHz/mm2. We give an interpretation to the variations of the effective gain, which, as a function of the particle flux, first increases and then decreases. Wre also discuss the reduction of the ion back-flow with increasing flux. We present measurements and simulations of a triple GEM detector, describing its behaviour in terms of accumulation of positive ions that results in changes of the transfer fields and the amplification fields. The behaviour is expected to be common to all multi-stage amplification devices where the... (More)

Gaseous Electron Multipliers (GEM) are well known for stable operation at high particle fluxes. We present a study of the intrinsic limits of GEM detectors when exposed to veiy high particle fluxes of the order of MHz/mm2. We give an interpretation to the variations of the effective gain, which, as a function of the particle flux, first increases and then decreases. Wre also discuss the reduction of the ion back-flow with increasing flux. We present measurements and simulations of a triple GEM detector, describing its behaviour in terms of accumulation of positive ions that results in changes of the transfer fields and the amplification fields. The behaviour is expected to be common to all multi-stage amplification devices where the efficiency of transferring the electrons from one stage to the next one is not 100%.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
EPJ Web of Conferences
volume
174
article number
05001
publisher
EDP Sciences
external identifiers
  • scopus:85043238721
ISSN
2101-6275
DOI
10.1051/epjconf/201817405001
language
English
LU publication?
yes
id
44b0d89a-792f-4d48-9ad9-70bda277d3fe
date added to LUP
2018-03-20 14:18:39
date last changed
2020-01-13 00:33:58
@article{44b0d89a-792f-4d48-9ad9-70bda277d3fe,
  abstract     = {<p>Gaseous Electron Multipliers (GEM) are well known for stable operation at high particle fluxes. We present a study of the intrinsic limits of GEM detectors when exposed to veiy high particle fluxes of the order of MHz/mm2. We give an interpretation to the variations of the effective gain, which, as a function of the particle flux, first increases and then decreases. Wre also discuss the reduction of the ion back-flow with increasing flux. We present measurements and simulations of a triple GEM detector, describing its behaviour in terms of accumulation of positive ions that results in changes of the transfer fields and the amplification fields. The behaviour is expected to be common to all multi-stage amplification devices where the efficiency of transferring the electrons from one stage to the next one is not 100%.</p>},
  author       = {Thuiner, P. and Resnati, F. and Franchino, S. and Diaz, D. Gonzalez and Hall-Wilton, R. and Muller, H. and Oliveri, E. and Pfeiffer, D. and Ropelewski, L. and Van Stenis, M. and Streli, C. and Veenhof, R.},
  issn         = {2101-6275},
  language     = {eng},
  month        = {02},
  publisher    = {EDP Sciences},
  series       = {EPJ Web of Conferences},
  title        = {Multi-GEM detectors in high particle fluxes},
  url          = {http://dx.doi.org/10.1051/epjconf/201817405001},
  doi          = {10.1051/epjconf/201817405001},
  volume       = {174},
  year         = {2018},
}