Accession Number : AD0651862

Title :   PORTABLE WIDE-RANGE RADIAC INSTRUMENT USING A SOLID-STATE ELECTROMETER.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Healey,Gerald F.

Report Date : FEB 1967

Pagination or Media Count : 23

Abstract : A wide range radiac instrument was developed to measure gamma radiation dose-rates from 1 mR/hr to 1000 R/hr in six linear ranges. The circuit is a hybrid type using an ion chamber for the four high ranges of 0-1, 10, 100, 1000 R/hr, and a G.M. tube, for the two low ranges 0-10, 100 mR/hr, contained in a detachable probe. An interesting feature of the circuit is the solid-state electrometer amplifier which uses insulated gate field-effect transistors in the input stage and its combination with a Geiger Mueller frisking probe to attain increased sensitivity. (Author)

Descriptors :   (*GAMMA COUNTERS, SEMICONDUCTOR DEVICES), (*ELECTROMETERS, GAMMA COUNTERS), (*DOSIMETERS, SEMICONDUCTOR DEVICES), PORTABLE EQUIPMENT, FIELD EFFECT TRANSISTORS, IONIZATION CHAMBERS, AMPLIFIERS

Subject Categories : Radiobiology
      Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE