Multi-GEM detectors in high particle fluxes
(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%.
(Less)
- author
- organization
- publishing date
- 2018-02-21
- 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
- 2022-04-25 06:16:15
@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}}, }