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Operation of MHSP multipliers in high pressure noble-gas
F.D. Amaro; J.F.C.A. Veloso; A. Breskin; R. Chechik; J.M.F. dos SantosWe report on the performance of a Micro-Hole & Strip Plate (MHSP) electron multiplier operating in pure Xe, Kr, Ar and Ne at the pressure range of 1 to 6 bar and in Ar – Xe mixtures at pressures ranging from 1 to 7 bar. Themaximal gains at 1 bar Xe and Kr are 5*104 and 105, respectively; they drop by about one order of magnitude at 2bar and by almost another order of magnitude at 5-6 bar; they reach g...
X-ray and UV imaging with multi-GEM/MHSP gaseous detectors
J.M. Maia; A. Breskin; R. Chechik; J.F.C.A. Veloso; J.M.F. dos SantosWe present the recent results regarding the application of cascades of GEMs and a MHSP in the detection and imaging of X-rays and UV-photons. The imaging system tested consisted in a micropattern gas detector based in multi-GEM or multi-GEM/MHSP electron multipliers, a 20´20 mm2 Wedge & Strip (W&S) readout electrode with 1.6 mm pitch positioned below and at close distance of a resistive electrode,...
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