Ionizing radiation detector

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867564

Thacker, Louis H ^[1]

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1. Knoxville, TN

An ionizing radiation detector is provided which is based on the principle of analog electronic integration of radiation sensor currents in the sub-pico to nano ampere range between fixed voltage switching thresholds with automatic voltage reversal each time the appropriate threshold is reached. The thresholds are provided by a first NAND gate Schmitt trigger which is coupled with a second NAND gate Schmitt trigger operating in an alternate switching state from the first gate to turn either a visible or audible indicating device on and off in response to the gate switching rate which is indicative of the level of radiation being sensed. The detector can be configured as a small, personal radiation dosimeter which is simple to operate and responsive over a dynamic range of at least 0.01 to 1000 R/hr.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4963747
• OSTI ID: 867564
• Country of Publication: United States
• Language: English

Related Subjects

ionizing
radiation
detector
provided
based
principle
analog
electronic
integration
sensor
currents
sub-pico
nano
ampere
range
fixed
voltage
switching
thresholds
automatic
reversal
time
appropriate
threshold
reached
nand
gate
schmitt
trigger
coupled
operating
alternate
visible
audible
indicating
device
response
rate
indicative
level
sensed
configured
personal
dosimeter
simple
operate
responsive
dynamic
01
1000
radiation sensor
radiation dosimeter
voltage switching
dynamic range
radiation detector
ionizing radiation
switching rate
personal radiation
indicating device
ampere range
voltage switch
automatic voltage
/250/