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Improved x-ray detection and particle identification with avalanche photodiodes
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Orientador(es)
Resumo(s)
Avalanche photodiodes are commonly used as detectors for low energy x-rays. In this work, we report on a fitting technique used to account for different detector responses resulting from photoabsorption in the various avalanche photodiode layers. The use of this technique results in an improvement of the energy resolution at 8.2 keV by up to a factor of 2 and corrects the timing information by up to 25 ns to account for space dependent electron drift time. In addition, this waveform analysis is used for particle identification, e.g., to distinguish between x-rays and MeV electrons in our experiment.
Descrição
279765. F.D.A., L.M.P.F., A.L.G., C.M.B.M., and J.M.F.S. acknowledge support from FEDER and FCT in the frame of Project No. PTDC/FIS-NUC/0843/2012. C.M.B.M. acknowledges the support of FCT under Contract No. SFRH/BPD/76842/2011. F.D.A. acknowledges the support of FCT under Contract No. SFRH/BPD/74775/2010. A.A., K.K., and K.S. acknowledge support from SNF 200021L-138175. T.G., A.V., B.W., and M.A.A. acknowledge support of DFG_GR_3172/9-1. This research was supported in part by Fundacao para a Ciencia e a Tecnologia (FCT), Portugal, through Project Nos. PEstOE/FIS/UI0303/2011 and PTDC/FIS/117606/2010, financed by the European Community Fund FEDER through the COMPETE. P.A. and J.M. acknowledge the support of the FCT under Contract Nos. SFRH/BPD/92329/2013 and SFRH/BD/52332/2013.
Palavras-chave
Photodiodes Instrumentation