Title of article
Single-UV-photon 2-D imaging with multi-GEM detectors
Author/Authors
Maia، نويسنده , , J.M. and Mِrmann، نويسنده , , D. and Breskin، نويسنده , , A. and Chechik، نويسنده , , Sheila R. M. Veloso، نويسنده , , J.F.C.A. and dos Santos، نويسنده , , J.M.F.، نويسنده ,
Pages
4
From page
373
To page
376
Abstract
The main goal being the construction of large-area, low-cost position-sensitive micropattern gaseous photomultipliers (GPMs) based on gas electron multipliers (GEM) cascades, we have studied the single-photon imaging capabilities of a 4-GEM GPM with a reflective CsI–photocathode deposited on the top surface of the 1st GEM. The charge readout was performed with a simple/economic Wedge and Strip (W&S) readout electrode, using pulses induced through a resistive electrode. We have demonstrated the feasibility of single-photon imaging GPM with sub-millimeter resolution; single-photon spatial resolutions as small as ∼150 μm (FWHM), i.e. ∼65 μm (RMS), were measured in Ar/5%CH4 gas mixture at atmospheric pressure.
Keywords
Gaseous photomultipliers , Gas electron multiplier , GPM , Single-UV-photon imaging , GEM , Gaseous imaging detector
Journal title
Astroparticle Physics
Record number
2030013
Link To Document