Extended range radiation dose-rate monitor

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866705

Valentine, Kenneth H ^[1]

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1. Knoxville, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United State (Washington, DC)
• Patent Number(s): US 4767929
• OSTI ID: 866705
• Country of Publication: United States
• Language: English

Related Subjects

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
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