Journal
JOURNAL OF INSTRUMENTATION
Volume 5, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1748-0221/5/10/P10002
Keywords
Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MICROMEGAS, InGrid, etc); Electron multipliers (gas); Charge transport and multiplication in gas; Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc)
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Funding
- FEDER [CERN/FP/109324/2009, CERN/FP/109283/2009]
- FCT (Lisbon) [SFRH/BD/30318/2006]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/30318/2006, CERN/FP/109324/2009, CERN/FP/109283/2009] Funding Source: FCT
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The operation principle and preliminary results of a novel gas-avalanche patterned hole electron multiplier, the Thick-COBRA (THCOBRA), are presented. This micro-hole structure is derived from the THGEM and MHSP. Sub-millimeter diameter holes are mechanically drilled in a thin G10 plate, Cu-clad on both faces; on one of the faces the Cu is etched to produce additional anode strips winding between circular cathode strips. Primary avalanches occurring within the holes are followed by additional ones at the anode-strips vicinity. Gains in excess of 5*10(4) were reached with 22.1 keV x-rays in Ar, Ne and Ar-10%CH(4), with 12.2% FWHM energy resolution in Ar-10%CH(4). Higher gains were measured with single photoelectrons. This robust multiplier may have numerous potential applications.
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