dorsal/arxiv
View SchemaThe Photon-Assisted Cascaded Electron Multiplier: a Concept for Potential Avalanche-Ion Blocking
| Authors | J. F. C. A. Veloso, F. D. Amaro, J. M. F. dos Santos, A. Breskin, A. Lyashenko, R. Chechik |
|---|---|
| Categories | |
| ArXiv ID | physics/0606209 |
| URL | https://arxiv.org/abs/physics/0606209 |
| DOI | 10.1088/1748-0221/1/08/P08003 |
| Journal | JINST1:P08003,2006 |
Abstract
We present a Photon-Assisted Cascaded Electron Multipliers (PACEM) which has a potential for ion back-flow blocking in gaseous radiation detectors: the avalanche from a first multiplication stage propagates to the successive one via its photons, which in turn induce photoelectron emission from a photocathode deposited on the second multiplier stage; the multiplication process may further continue via electron-avalanche propagation. The photon-mediated stage allows, by a proper choice of geometry and fields, complete blocking of the ion back-flow into the first element; thus, only ions from the latter will flow back to the drift region. The PACEM concept was validated in a double-MHSP (Micro-Hole & Strip Plate) cascaded multiplier operated in xenon, where the intermediate scintillation stage provided optical gain of ~60. The double-MHSP detector had a total gain above 10^4 and energy resolution of 18% FWHM for 5.9 keV x-rays.
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"abstract": "We present a Photon-Assisted Cascaded Electron Multipliers (PACEM) which has\na potential for ion back-flow blocking in gaseous radiation detectors: the\navalanche from a first multiplication stage propagates to the successive one\nvia its photons, which in turn induce photoelectron emission from a\nphotocathode deposited on the second multiplier stage; the multiplication\nprocess may further continue via electron-avalanche propagation. The\nphoton-mediated stage allows, by a proper choice of geometry and fields,\ncomplete blocking of the ion back-flow into the first element; thus, only ions\nfrom the latter will flow back to the drift region. The PACEM concept was\nvalidated in a double-MHSP (Micro-Hole \u0026 Strip Plate) cascaded multiplier\noperated in xenon, where the intermediate scintillation stage provided optical\ngain of ~60. The double-MHSP detector had a total gain above 10^4 and energy\nresolution of 18% FWHM for 5.9 keV x-rays.",
"arxiv_id": "physics/0606209",
"authors": [
"J. F. C. A. Veloso",
"F. D. Amaro",
"J. M. F. dos Santos",
"A. Breskin",
"A. Lyashenko",
"R. Chechik"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1088/1748-0221/1/08/P08003",
"journal_ref": "JINST1:P08003,2006",
"title": "The Photon-Assisted Cascaded Electron Multiplier: a Concept for Potential Avalanche-Ion Blocking",
"url": "https://arxiv.org/abs/physics/0606209"
},
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