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SILICON PHOTOELECTRONIC MULTIPLIERS AS A BASIS FOR CREATING COMBINED SENSORS

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The possibility of constructing combined sensors based on silicon photoelectronic multipliers is analyzed. The influence of temperature and supply voltage of silicon photoelectronic multipliers on changes in dark current, sensitivity to optical radiation and critical illumination is investigated. An installation for carrying out the research under consideration is proposed. Experimental samples of Si-photomultiplier tubes (Si-PMTs) with a p+-p-n+ structure produced by JSC Integral (Republic of Belarus), as well as serially produced silicon photomultipliers Ketek PM 3325 and ON Semi FC 30035 are studied. It is shown that the temperature dependence of the dark current for these Si-PMTs has a linear form. The temperature increase is found to decrease the sensitivity of silicon photomultiplier tubes to optical radiation. The value of the critical illumination for Si-PMT is shown to increase with increasing temperature. Based on results of the performed studies, a structure of combined sensor based on silicon photomultiplier tube is proposed, allowing for simultaneous control over the two parameters, temperature and illumination. Main characteristics of this sensor are evaluated.

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