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A novel real-time optical fibered dosimetry system based on optically stimulated luminescence (OSL) of SrS:Ce,Sm phosphor was developed and is presented. The advantages of this system are the combination of OSL and optical fibers, immediate readout, simplicity of use, low cost, reliability, flexibility, and robustness. Experimental results show an excellent linearity with the dose (0.01 to 6 Gy), repeatability better than 2%, radiation sensitivity up to 80 mV.cGy-1 and accuracy since error on dose is less than 5%. The applications targeted are the measurement of the dose delivered during a treatment in radiation therapy and the monitoring of the dose or dose-rate around or in nuclear reactor and accelerator facilities in high energy physics. Further experiments are still to be conducted in order to fully characterize the system and evaluate the feasibility of each application mentioned. [ABSTRACT FROM AUTHOR]

The low-dose-rate response of five bipolar integrated circuits is evaluated on the basis of switching experiments. Such experiments consist of performing first a high-dose-rate irradiation followed by a low-dose-rate irradiation. Based on these experiments, a time-saving method to predict the low-dose-rate degradation of bipolar linear microcirduits is proposed. This approach provides a good estimate of the low-dose-rate degradation. [ABSTRACT FROM AUTHOR]

A new approach for assessing the risk of upsetting digital optocouplers due to the propagation of single event transients (SETs) is proposed. The optocoupler's input current (If) and propagation time (tpHL) are found to be the most critical parameters for this approach. A case study using the 6N140 optocoupler and SETs measured at the output of the National Semi- conductor LM139 is detailed to validate the concept. [ABSTRACT FROM AUTHOR]