Extended range radiation dose-rate monitor
Abstract
An extended range dose-rate monitor is provided which utilizes the pulse pileup phenomenon that occurs in conventional counting systems to alter the dynamic response of the system to extend the dose-rate counting range. The current pulses from a solid-state detector generated by radiation events are amplified and shaped prior to applying the pulses to the input of a comparator. The comparator generates one logic pulse for each input pulse which exceeds the comparator reference threshold. These pulses are integrated and applied to a meter calibrated to indicate the measured dose-rate in response to the integrator output. A portion of the output signal from the integrator is fed back to vary the comparator reference threshold in proportion to the output count rate to extend the sensitive dynamic detection range by delaying the asymptotic approach of the integrator output toward full scale as measured by the meter.
- Inventors:
-
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 866705
- Patent Number(s):
- 4767929
- Assignee:
- United States of America as represented by United State (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- extended; range; radiation; dose-rate; monitor; provided; utilizes; pulse; pileup; phenomenon; occurs; conventional; counting; systems; alter; dynamic; response; extend; current; pulses; solid-state; detector; generated; events; amplified; shaped; prior; applying; input; comparator; generates; logic; exceeds; reference; threshold; integrated; applied; meter; calibrated; indicate; measured; integrator; output; portion; signal; fed; vary; proportion; count; rate; sensitive; detection; delaying; asymptotic; approach; scale; radiation events; radiation dose-rate; current pulse; output signal; radiation dose; input pulse; current pulses; count rate; extended range; dynamic response; solid-state detector; radiation event; pulse pileup; meter calibrated; dose-rate monitor; range radiation; /250/
Citation Formats
Valentine, Kenneth H. Extended range radiation dose-rate monitor. United States: N. p., 1988.
Web.
Valentine, Kenneth H. Extended range radiation dose-rate monitor. United States.
Valentine, Kenneth H. Fri .
"Extended range radiation dose-rate monitor". United States. https://www.osti.gov/servlets/purl/866705.
@article{osti_866705,
title = {Extended range radiation dose-rate monitor},
author = {Valentine, Kenneth H},
abstractNote = {An extended range dose-rate monitor is provided which utilizes the pulse pileup phenomenon that occurs in conventional counting systems to alter the dynamic response of the system to extend the dose-rate counting range. The current pulses from a solid-state detector generated by radiation events are amplified and shaped prior to applying the pulses to the input of a comparator. The comparator generates one logic pulse for each input pulse which exceeds the comparator reference threshold. These pulses are integrated and applied to a meter calibrated to indicate the measured dose-rate in response to the integrator output. A portion of the output signal from the integrator is fed back to vary the comparator reference threshold in proportion to the output count rate to extend the sensitive dynamic detection range by delaying the asymptotic approach of the integrator output toward full scale as measured by the meter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}