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Vehicle Mounted Gamma Spectroscopic Mapping System
In 2001, the Health Physics and Technical Services Section at ARPANSA Melbourne designed and constructed a vehicle-mounted gamma spectroscopy system for the mapping of radioactive contamination.
The system comprised two large-volume NaI(Tl) gamma-ray detectors, each connected to a computer controlled multi-channel analyser. The detectors, a GPS receiver and the computer were mounted in a weather-proof case fixed to the roof of the vehicle Pic#1.
A LCD monitor with a touchscreen was mounted inside the vehicle in view of the driverPic#2. This monitor was connected to the roof-mounted computer Pic#3 Pic#4. The software allowed real-time spectrum analysis of gamma ray spectra collected at 12 second intervals Pic#5. These were stored to a removable hard disk, together with the vehicle position obtained from the GPS receiver.
If digital road maps were available, the software provided a real-time moving map display of position and radiation levels. Pic#6 Pic#7 Pic#8
The vehicle-mounted gamma spectroscopy system was used to measure background gamma-ray spectra in the suburbs around Lucas Heights and in the immediate area around the ports that host visits by nuclear powered warships.
See more information Background Radiation.
Picture Gallery (Click to enlarge)
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| Pic#1 | Pic#2 | Pic#3 | Pic#4 |
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| Pic#5 | Pic#6 | Pic#7 | Pic#8 |