Combined radiation dosimeter and rate meter
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United States of America Patent
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Sep 22, 2009
Grant Date -
Mar 1, 2007
app pub date -
Aug 25, 2005
filing date -
Aug 25, 2005
priority date (Note) -
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Abstract
A radiation detector can perform both rate and dose measurements for personal safety and also to provide measurements that are sufficiently sensitive for security applications. In one embodiment, a radiation detector has a first measurement channel and a second measurement channel, where the second measurement channel can measure radiation at levels that would saturate the first measurement channel. The detector can automatically switch between the high and low sensitivity channels while continuously integrating the measured rates to determine a radiation dose. The detector can also conserve power by automatically shutting off the unused measurement channel and still give a personal safety warning when the radiation rate or the dose reaches respective alarm thresholds.
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