Title of article
Towards a PMT based optical readout GEM TPC—First results
Author/Authors
Fetal، نويسنده , , S.T.G and Fraga، نويسنده , , F.A.F and Margato، نويسنده , , L.M.S. and Fraga، نويسنده , , M.M.F.R. and Pereira، نويسنده , , S.R. and Ferreira Marques، نويسنده , , R. and Policarpo، نويسنده , , A.J.P.L.، نويسنده ,
Pages
4
From page
202
To page
205
Abstract
We report the first results on the operation of an optical double GEM TPC, read out by four photomultipliers in a square array. The detector, operated with Ar + 5 % CF 4 at atmospheric pressure, was tested with 241Am alpha particles emitted in various orientations. We obtained a typical track angle resolution of 2 ∘ ( σ ) at 45 ∘ and achieved a point position resolution of better than 1 mm (FWHM) for the X- and Y-directions in the GEM plane.
Keywords
GEM , PMT , Optical readout , Scintillation , TPC
Journal title
Astroparticle Physics
Record number
2030751
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