학술논문
Improved X-ray detection and particle identification with avalanche photodiodes
Document Type
Working Paper
Author
Diepold, Marc; Fernandes, Luis M. P.; Machado, Jorge; Amaro, Pedro; Abdou-Ahmed, Marwan; Amaro, Fernando D.; Antognini, Aldo; Biraben, François; Chen, Tzu-Ling; Covita, Daniel S.; Dax, Andreas J.; Franke, Beatrice; Galtier, Sandrine; Gouvea, Andrea L.; Götzfried, Johannes; Graf, Thomas; Hänsch, Theodor W.; Hildebrandt, Malte; Indelicato, Paul; Julien, Lucile; Kirch, Klaus; Knecht, Andreas; Kottmann, Franz; Krauth, Julian J.; Liu, Yi-Wei; Monteiro, Cristina M. B.; Mulhauser, Françoise; Naar, Boris; Nebel, Tobias; Nez, François; Santos, José Paulo; Santos, Joaquim M. F. dos; Schuhmann, Karsten; Szabo, Csilla I.; Taqqu, David; Veloso, João F. C. A.; Voss, Andreas; Weichelt, Birgit; Pohl, Randolf
Source
Rev. Sci. Inst. 86, 053102 (2015)
Subject
Language
Abstract
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 photo absorption in the various APD 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.
Comment: 6 pages, 6 figures
Comment: 6 pages, 6 figures