Abstract:
AN IMPROVED DIGITAL RADIATION DOSIMETER OF THE OSCILLATING IONIZATION CHAMBER TYPE INCLUDING A GAS DIODE CONNECTED IN SERIES WITH THE CHAMBER ANODE HAS BEEN PROVIDED WITH IMPROVED OPERATION AND MINIATURIZATION OF THE DETECTOR CHAMBER. THIS IS MADE POSSIBLE BY A CIRCUIT THAT ADDS STROBE PULSES TO THE NORMAL DC CHAMBER BIAS VOLTAGE SO AS TO ALLOW THE GAS DIODE TO DISCHARGE EVEN THOUGH THE ACTIVE CHAMBER VOLUME IS NOT LARGE ENOUGH TO PRODUCE SUFFICIENT DIODE BIAS CURRENT AT LOW RADIATION EXPOSURE RATES.
Abstract:
An alarm dosimeter has been provided which features an improved integrating pulse ionization chamber of the type containing an hermetically sealed gas diode. Improved operation and miniaturization of the chamber are made possible by a ringing choke converter high voltage supply having a ripple-type output that insures discharge of the gas diode.