Title :
New concepts for the design of large area gas proportional scintillation counters
Author :
Conde, C.A.N. ; Dos Santos, J.M.F. ; Bento, A.C.S.S.M.
Author_Institution :
Dept. of Phys., Coimbra Univ., Portugal
fDate :
8/1/1993 12:00:00 AM
Abstract :
New concepts are presented that allow the design of gas proportional scintillation counters with the large areas and medium-size photomultipliers. These designs are based on the compensation of the radial decrease of the scintillation light collected in the photomultiplier due to solid angle and reflection effects, with a radial increase of the light production due to a nonuniform electric field produced by a properly shaped curved grid. An implementation of these concepts based on a 2-in-diameter photomultiplier is presented. It shows a pulse amplitude variation along the radial position (0 to 10 mm) of less than 0.5%, and an energy resolution of 8.0% for a broad 5.9-keV X-ray beam entering the detector through the full 25-mm-diameter window
Keywords :
X-ray detection and measurement; photomultipliers; position sensitive particle detectors; proportional counters; scintillation counters; 2 in; 2-in-diameter photomultiplier; 5.9 keV; curved grid; design; energy resolution; gas proportional scintillation counters; large area; light production; medium-size photomultipliers; nonuniform electric field; radial position; Electrons; Energy resolution; Nonuniform electric fields; Optical reflection; Photomultipliers; Production; Scintillation counters; Solid scintillation detectors; X-ray detection; X-ray detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
