How does the RadDetect™ PRD 1250 detect radiation?
The RadDetect™ Personal Radiation Detector has a dual-mode sensor which converts direct and indirect incident radiation into an electric signal that is sensed and processed by a small computer.
Direct Conversion
Direct conversion is accomplished when incident radiation strikes the depletion region of the sensor which then outputs a small electric signal. When a radioactive photon strikes a depletion region created by reverse bias on the photodiode, it produces a small amount of charge in proportion to the photon's energy. The resulting signal is then amplified and processed by the CPU in the RadDetect™. Detectors that convert incoming radiation directly into the electrical signal are called direct conversion type detectors.
Radiation > strikes depletion region of our sensor > small electric signal is created. The resulting signal is then amplified and processed by the CPU in the RadDetect™.
Indirect Conversion
Indirect conversion occurs when incident radiation strikes the radio-luminescent material (which then emits light). Incoming radiation is converted by a scintillator material in our indirect conversion type detector, where the radiation energy is first converted into the visible light. The visible light is then captured by the photodiode and converted to an electric signal. The resulting signal is then amplified and processed by the CPU in the RadDetect™.
Radiation > Radio-luminescent material (converts radiation to light) > Our sensor (converts light to an electric signal) The resulting signal is then amplified and processed by the CPU in the RadDetect™.
