Abstract

In this paper, a novel system for distributed measurement of gamma radiation has been described. The system is composed of multiple intelligent sensor nodes connected through Ethernet to a client PC that executes application software. The software is capable of presenting, processing, and storing values of ambient dose equivalent rate, as well as of configuring sensor nodes, and displaying their positions. Main contributions of the paper are in the integration of a gamma probe into a smart sensor and in the design of the probe that is not only power efficient and cost effective, but also has all the measurement characteristics needed for an area monitor. A high voltage power supply is carefully designed so that the gamma probe consumes only 200 µA at low counting rate. A number of calibrations and measurements with the gamma probes are performed and the whole system is successfully implemented and tested.

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