The operation of Thick Gaseous Electron Multipliers (THGEM) in Ne and Ne/CH4 mixtures, features high multiplication factors at relatively low operation potentials, in both single- and double-THGEM configurations. We present some systematic data measured with UV-photons and soft x-rays, in various Ne mixtures. It includes gain dependence on hole diameter and gas purity, photoelectron extraction efficiency from CsI photocathodes into the gas, long-term gain stability and pulse rise-time. Position resolution of a 100 × 100 mm2 X-ray imaging detector is presented. Possible applications are discussed.
THGEM operation in Ne and Ne/CH4 / M. Cortese, V. Peskov, G. Bartesaghi, J. Miyamoto, S. Cohen, R. Chechik, J.M. Maia, J.M.F. Dos Santos, G. Gambarini, V. Dangendorf, A. Breskin. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 4:8(2009), pp. P08001.P08001.1-P08001.P08001.24. [10.1088/1748-0221/4/08/P08001]
THGEM operation in Ne and Ne/CH4
M. CortesePrimo
;G. Bartesaghi;G. Gambarini;
2009
Abstract
The operation of Thick Gaseous Electron Multipliers (THGEM) in Ne and Ne/CH4 mixtures, features high multiplication factors at relatively low operation potentials, in both single- and double-THGEM configurations. We present some systematic data measured with UV-photons and soft x-rays, in various Ne mixtures. It includes gain dependence on hole diameter and gas purity, photoelectron extraction efficiency from CsI photocathodes into the gas, long-term gain stability and pulse rise-time. Position resolution of a 100 × 100 mm2 X-ray imaging detector is presented. Possible applications are discussed.
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