Dead-time compensation for a logarithmic display rate meter

Patent · Tue Sep 20 04:00:00 EDT 1988

OSTI ID:866724

Larson, John A ^[1]; Krueger, Frederick P ^[1]

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1. Aurora, IL

An improved circuit is provided for application to a radiation survey meter that uses a detector that is subject to dead time. The circuit compensates for dead time over a wide range of count rates by producing a dead-time pulse for each detected event, a live-time pulse that spans the interval between dead-time pulses, and circuits that average the value of these pulses over time. The logarithm of each of these values is obtained and the logarithms are subtracted to provide a signal that is proportional to a count rate that is corrected for the effects of dead time. The circuit produces a meter indication and is also capable of producing an audible indication of detected events.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• DOE Contract Number: AC02-76CH03000
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4772793
• Application Number: 07/104,029
• OSTI ID: 866724
• Country of Publication: United States
• Language: English

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