Ionizing radiation detector using multimode optical fibers

Author

Suter, J.J. ; Poret, J.C. ; Rosen, M. ; Rifkind, J.M.

Author_Institution

Johns Hopkins Univ., Laurel, MD, USA

Volume

40

Issue

4

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

466

Lastpage

469

Abstract

An optical ionizing radiation detector, based on the attenuation of 850-nm light in 50/125-μm multimode fibers, is described. The detection element consists of a section of coiled fibers that has been designed to strip higher-order optical modes. Cylindrical radiation shields with atomic numbers ranging from Z=13 (aluminium) to Z=82 (lead) are placed around the ionizing radiation detector so that the effectiveness of the detector can be measured. By exposing the shields and the detector to 1.25-MeV cobalt 60 radiation, the mass attenuation coefficients of the shields are measured. Electron spin resonance spectroscopy performed on the 50/125-μm fibers shows the presence of germanium oxide and phosphorus-based color centers. The intensity of these centers is directly related to the accumulated gamma radiation

Keywords

light absorption; optical fibres; paramagnetic resonance of colour centres; scintillation counters; shielding; 1.25 MeV; 125 micron; 50 micron; 850 nm; GeO; P; color centers; electron spin resonance spectroscopy; gamma irradiation; light attenuation; mass attenuation coefficients; multimode optical fibers; optical ionizing radiation detector; radiation shields; Aluminum; Atom optics; Atomic measurements; Ionizing radiation; Optical attenuators; Optical design; Optical detectors; Optical fibers; Radiation detectors; Strips;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.256602

Filename

256602