Charge transport tactical dosimeter

US4019058A · kind A · utility

Inventors

• Stanley Kronenberg · Skillman, US
• Robert A. Lux · Toms River, US

Key dates

• Filing date: Oct 23, 1975
• Grant date: Apr 19, 1977
• Expiry date: Oct 23, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G01T1/14
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A quartz fiber electroscope shunted by a variable capacitor is periodically coupled to a radiation detection capacitor formed of material of a relatively large atomic number, e.g. aluminum, completely surrounded by a material of lesser atomic number, e.g. polyethylene. An electrical charge is induced by neutron or gamma radiation on the material of relatively large atomic number which charge is then coupled to the electroscope and variable capacitor combination. The variable capacitor is set at its maximum when the voltage is transferred from the detection capacitor. The variable capacitor is then reduced, thus raising the voltage on the electroscope with the dose being determined by the reduction in capacitance necessary to raise the indicated electrometer voltage to a predetermined magnitude. The variable capacitor includes indicia thereon which is calibrated such that the voltage change provides a direct reading of the charge transfer and consequently dosage.