A comparative study of microstrip plate geometries as UV photosensors with reflective photocathodes: simulation

Author

Freitas, D.S.A.P. ; Veloso, J.F.C.A. ; Dos Santos, J.M.F. ; Conde, C.A.N.

Author_Institution

Dept. de Fisica, Coimbra Univ., Portugal

Volume

48

Issue

3

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

411

Lastpage

416

Abstract

A numerical simulation of eight microstrip plate geometries operated in 760 torr of xenon was performed. The cathode widths and anode-to-cathode gaps were varied while the anode widths were held constant at 10 μm. Avalanche multiplication factors as a function of position and total gains for all geometries were determined. Since optical positive feedback is a limiting factor in considering microstrip plates as vacuum ultraviolet (VUV) photosensors, the optical positive feedback of a CsI-coated microstrip plate used as a VUV photosensor for a gas proportional scintillator counter was estimated for all geometries. The geometry with the least optical positive feedback in this application was determined to have 160-μm cathodes and cathode-to-anode gaps of 55 μm

Keywords

gas scintillation detectors; photocathodes; proportional counters; ultraviolet detectors; CsI-coated microstrip plate; UV photosensors; VUV photosensor; Xe; anode-to-cathode gap; avalanche multiplication factors; cathode width; gas proportional scintillator counter; microstrip plate geometries; numerical simulation; photocathodes; Biomedical optical imaging; Cathodes; Coatings; Detectors; Geometrical optics; Geometry; Microstrip; Optical feedback; Optical sensors; Physics;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.940090

Filename

940090