Physics – Instrumentation and Detectors
Scientific paper
2006-01-17
Nucl.Instrum.Meth.A558:475-489,2006
Physics
Instrumentation and Detectors
41 pages, 27 figures. Submitted to Nucl. Instr. and Meth. A, Dec 21, 2005
Scientific paper
10.1016/j.nima.2005.12.241
Thick GEM-like (THGEM) gaseous electron multipliers are made of standard printed-circuit board perforated with sub-millimeter diameter holes, etched at their rims. Effective gas multiplication factors of 100000 and 10000000 and fast pulses in the few nanosecond rise-time scale were reached in single- and cascaded double-THGEM elements, in atmospheric-pressure standard gas mixtures with single photoelectrons. High single-electron detection efficiency is obtained in photon detectors combining THGEMs and semitransparent UV-sensitive CsI photocathodes or reflective ones deposited on the top THGEM face; the latter benefits of a reduced sensitivity to ionizing background radiation. Stable operation was recorded with photoelectron fluxes exceeding MHz/mm2. The properties and some potential applications of these simple and robust multipliers are discussed.
Breskin Amos
Chechik Rachel
Michaeli Karen
Shalem C.
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