Variability of the minimum detectable energy of an APD as an electron detector

S. Kasahara, T. Takashima, M. Hirahara

doi:10.1016/j.nima.2011.11.033

Variability of the minimum detectable energy of an APD as an electron detector

DOI Web Site Web Site 被引用文献5件

書誌事項

公開日: 2012-02

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DOI

10.1016/j.nima.2011.11.033

公開者: Elsevier BV

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説明

Abstract The purpose of this study is to evaluate the variability of the minimum detectable energy of the avalanche photodiode which would be applied for measurements of medium-energy ( ∼ 10 – 100 keV ) electrons in future magnetospheric exploration. The minimum detectable energy is affected by temperature variations as well as radiation. Our experiments and theoretical considerations show that the minimum detectable energy is significantly deteriorated at room temperature after proton irradiation of > 10 krad mainly due to an increase in the dark current, whereas such a degradation is less prominent when the device is cooled down to 5 ° C . These results provide a guideline for the thermal design of the medium-energy electron instruments especially for harsh-radiation space missions.