OPTICAL FIBER TYPE LARGE AREA RADIATION MONITOR

摘要

PROBLEM TO BE SOLVED: To realize a highly sensitive and uniform measurement in the whole area (large area) of a detecting part, and reduce the thickness and weight so as to be easily handled. ;SOLUTION: In a large area radiation monitor for setting a radiation detector adjacent to a subject to be measured to detect the radiation released from radioactivity, and judging the magnitude of the output level from the radiation detector, a detecting part is formed by a plastic scintillator 1 having a large area for emitting a light by the interaction with radiation. A radiation detector is constituted in such a manner that a plurality of optical fibers 2 with small diameter containing a material receiving the light from the plastic scintillator 1 and emitting fluorescence are juxtaposed on the plastic scintillator 1 and delivered from the detecting part, or optical fibers 2 using the plastic scintillator 1 as the material are flatly arranged on the detecting part and delivered from the detecting part as they are, and these optical fibers are then optically coupled to a photomal 4 set in an external position distant from the detecting part to convert the light signal transmitted from the detecting part into an electric signal.;COPYRIGHT: (C)1997,JPO