DocumentCode
2619006
Title
GEM-MIGAS electron multiplier operation in Argon-Methane mixtures
Author
Conceição, A.S. ; Maia, J.M. ; Mir, J.A. ; Fernandes, L.M.P. ; Santos, J. M F dos
Author_Institution
Instrumentation Center, Physics Department, University of Coimbra, 3004-516, Portugal
fYear
2008
fDate
19-25 Oct. 2008
Firstpage
908
Lastpage
912
Abstract
A Gas Electron Multiplier with a Micro-Induction Gap Amplifying Structure (GEM-MIGAS) is formed when a conventional GEM is operated with a short induction gap, typically 50 μm wide. A three-dimensional electric field simulation in a GEM-MIGAS detector was performed in order to evaluate the electric field profile in the different regions of the structure. Different electrostatic conditions were undertaken to forecast the detector performance in gas medium. An experimental study of GEM-MIGAS operating in an Ar/CH4 (90/10%) gas mixture and in pure CH4 was also carried out. Performance characteristics, including charge gain and energy resolution for 5.9 keV X-rays, are presented.
Keywords
Anodes; Argon; Detectors; Electron multipliers; Energy resolution; Performance evaluation; Performance gain; Physics; Voltage; X-rays;
fLanguage
English
Publisher
ieee
Conference_Titel
Nuclear Science Symposium Conference Record, 2008. NSS '08. IEEE
Conference_Location
Dresden, Germany
ISSN
1095-7863
Print_ISBN
978-1-4244-2714-7
Electronic_ISBN
1095-7863
Type
conf
DOI
10.1109/NSSMIC.2008.4774542
Filename
4774542
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