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 Santos

J. M. Maia Dept. of Particle Physics, The Weizmann Institute of Science; Physics Dept., University of Beira Interior; Instrumentation Center, Physics Dept., University of Coimbra
A. Breskin Dept. of Particle Physics, The Weizmann Institute of Science
R. Chechik Dept. of Particle Physics, The Weizmann Institute of Science
J. F. C. A. Veloso Physics Dept., University of Aveiro
J. M. F. dos Santos Instrumentation Center, Physics Dept., University of Coimbra

Resumo

We 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, and a position enconding electronics with a DAQ system. Spatial resolutions in the x and y coordinates lower than ~100 mm RMS, were measured in Ar/5%CH4 gas mixture at atmospheric pressure.