Title :
Energy resolution contributions in reach-through avalanche photodiodes
Author :
Fernandes, L.M.P. ; Gouvea, A.L. ; dos Santos, J.M.F. ; Kottmann, Franz
Author_Institution :
Phys. Dept., Univ. of Coimbra, Coimbra, Portugal
fDate :
Oct. 27 2012-Nov. 3 2012
Abstract :
Avalanche photodiodes (APDs) will be used in the muonic helium Lamb shift experiment for detection of 8 keY Xrays. Reach-through APDs (RT-APDs) from Hamamatsu Photonics have been investigated for X-ray detection as an alternative to conventional APDs. In order to understand the behavior of the energy resolution obtained in a RT-APD for 8 keY X-rays, the APD response to visible light pulses from a LED has also been investigated. The gain non-uniformity is determined from the comparison of the energy resolution obtained for X-rays and light pulses. In addition, the measurement of the electronic noise contribution allows the determination of the excess noise factor. Results at different temperatures are shown.
Keywords :
X-ray detection; avalanche photodiodes; Hamamatsu Photonics; X-ray detection; electron volt energy 8 keV; electronic noise contribution measurement; energy resolution; energy resolution behavior; muonic helium Lamb shift experiment; noise factor determination; reach-through avalanche photodiodes; visible light pulses;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-2028-3
DOI :
10.1109/NSSMIC.2012.6551137
