Reliability of Semiconductor and Gas-Filled Diodes for Over-Voltage Protection Exposed to Ionizing Radiation
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The wide-spread use of semiconductor and gas-filled diodes for non-linear over-voltage protection results in a variety of possible working conditions. It is therefore essential to have a thorough insight into their reliability in exploitation environments which imply exposure to ionizing radiation. The aim of this paper is to investigate the influence of irradiation on over-voltage diode characteristics by exposing the diodes to californium-252 combined neutron/gamma radiation field. The irradiation of semiconductor over-voltage diodes causes severe degradation of their protection characteristics. On the other hand, gas-filled over-voltage diodes exhibit a temporal improvement of performance. The results are presented with the accompanying theoretical interpretations of the observed changes in over-voltage diode behaviour, based on the interaction of radiation with materials constituting the diodes.
Keywords:diodes / nuclear radiation effects / over-voltage protection
Source:Nuclear technology and radiation protection, 2009, 24, 2, 132-137
- Ministry of Science and Technological Development of the Republic of Serbia