Gamma dosimetry
- Fig 1. Electronics of dosimeter
- Fig 2. Irradiation facility
Development of an electronic photon personal dosimeter
Currently, efforts are made to develop an electronic personal photon dosimeter based on Si-pin diodes including special filter combinations. The diodes are covered by different filters and, for this reason, are sensitive to photons with different energies. The signals from the Si-detectors are evaluated both in an analogue and digital way, and finally doses are internally calculated.
Figure 1 shows the first prototype of the analogue electronic circuit, the new smaller SMD version (bottom, left) and two small detectors (bottom, right).
Figure 2 shows the facility used to calibrate the prototypes at various photon energies.
Technical data
Power supply: 3.3V 200µA.
Noise level: about 5keV.