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Title: Dead-time compensation for a logarithmic display rate meter

Abstract

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. 5 figs.

Inventors:
;
Issue Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
OSTI Identifier:
6866672
Patent Number(s):
6104029
Assignee:
TIC; EDB-88-179241
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Patent
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DEAD TIME; CORRECTIONS; ELECTRONIC CIRCUITS; DESIGN; INVENTIONS; LOGARITHMIC RATEMETERS; COUNTING RATEMETERS; ELECTRONIC EQUIPMENT; EQUIPMENT; TIMING PROPERTIES; 440102* - Radiation Instrumentation- Radiation Dosemeters

Citation Formats

Larson, J A, and Krueger, F P. Dead-time compensation for a logarithmic display rate meter. United States: N. p., 1987. Web.
Larson, J A, & Krueger, F P. Dead-time compensation for a logarithmic display rate meter. United States.
Larson, J A, and Krueger, F P. Mon . "Dead-time compensation for a logarithmic display rate meter". United States.
@article{osti_6866672,
title = {Dead-time compensation for a logarithmic display rate meter},
author = {Larson, J A and Krueger, F P},
abstractNote = {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. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {10}
}