Wide-range radiation dose monitor

Patent · Tue May 13 00:00:00 EDT 1986

OSTI ID:5716974

Kopp, M K

A wide-range radiation dose-rate monitor is described including: a proportional counter having an anode and an ionizable gas disposed between the anode and the cathode for sensing ionizing radiation; a current sensing means connected to the anode of the proportional counter for generating an output voltage signal proportional to an input current signal from the anode; a meter connected to the output of the current sensing means and calibrated to indicated measured radiation dose-rate in response to the output signal of the current sensing means; a constant amplitude oscillator for generating an a.c. output at a constant amplitude; means for generating a selected clamping voltage signal at an output thereof; a comparator circuit means responsive to the output voltage signal of the current sensing means and the clamping voltage signal for selectively attenuating the amplitude of the a.c. output signal of the constant amplitude oscillator at an output of the comparator circuit means in response to changes in the amplitude of the output of the current sensing means in excess of the clamping voltage; a step-up transformer having a primary winding and a secondary winding; a power amplifier connected between the output of the comparator circuit means and the primary winding of the transformer; a rectifier/voltage multiplier circuit means connected between the secondary winding of the transformer and the cathode of the proportional counter for generating and applying a high voltage d.c. bias signal to the proportional counter.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4588892
• OSTI ID: 5716974
• Resource Relation: Patent File Date: Filed date 20 Sep 1984
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DOSEMETERS
DESIGN
ALTERNATING CURRENT
AMPLITUDES
ANODES
CATHODES
COMPARATOR CIRCUITS
DIRECT CURRENT
DOSE RATES
ELECTRIC MEASURING INSTRUMENTS
ELECTRIC POTENTIAL
IONIZING RADIATIONS
OSCILLATORS
POWER AMPLIFIERS
PROPORTIONAL COUNTERS
RECTIFIERS
SIGNALS
TRANSFORMERS
AMPLIFIERS
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTRODES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
MEASURING INSTRUMENTS
RADIATION DETECTORS
RADIATIONS
440102* - Radiation Instrumentation- Radiation Dosemeters