Optical fiber radiation detector and real-time dosimeter

Details Optical fiber radiation detector and real-time dosimeter Optical fiber radiation detector and real-time dosimeter

1981-05-11

1983-11-01

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

2504841, 350 9610, G01T 120, H05B 3300, G02B 514

Patent

active

044131844

ABSTRACT:
An optical fiber dosimeter for monitoring by luminescence the presence of ionizing radiation and measuring a cumulative dose from around reactors, accelerators and waste storage areas. A length of silica core optical fiber in the presence of ionizing radiation has been found to luminesce in two distinct emission bands, one with a peak around 450 nm (blue) and the other with a peak around 650 nm (red). The intensity of the red luminescence is proportional to the intensity of ionizing radiation on the fiber whereas the intensity of blue luminescence is proportional to both the intensity of ionizing radiation on the fiber and the accumulated ionizing radiation history or dosage on the fiber. A device constructed according to the invention may be employed to surround an area of a human body tissue or organ undergoing radiation treatment as an aid in directing the radiation.

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patent: 3089957 (1963-05-01), Bishay
patent: 3578973 (1971-05-01), Dooley et al.
patent: 4229069 (1980-10-01), Motin et al.
P. Kaiser, "Drawing-induced Coloration in Vitreous Silica Fibers", J. of ical Society, vol. 64, No. 4, Apr. 1974.
"New Real-Time Dosimeters Use Fiber Optics", NRL R&D Highlights, vol. 1, No. 1, Dec. 1974.
"Drawing-induced Defect Centers in a Fused Silica Core Fiber", Applied Physics Letters, vol. 28, No. 9, May 1, 1976.

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