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

Volume

40

Issue

4

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

452

Lastpage

454

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.256599

Filename

256599