Speaker
Florian Schneider
(TU München Klinikum rechts der Isar Nuklearmedizin)
Description
SiPMs are nowadays available from varying manufacturers. The investigated device was the latest KETEK PM3350. Its peak sensitivity is for blue light, it has an active area of 3 x 3 mm² with 50 µm cell size and operates in a large bias region from 24 - 32 V. The active area is covered with an epoxy layer and the package is kept at the smallest possible size of 3.9 x 4.4 x 2.0 mm³
We determined the performance of the SiPM. From the single-photon spectra measured with a pulsed blue LED, we extracted the breakdown voltage (22.8 V) and photodetection efficiency (up to 40%). Without illumination, the darkcount rate (1.5 MHz @ 26 V), I-V characteristics, single cell resistivity (0.6 MOhm), crosstalk (13% @ 26 V) and afterpulsing have been determined. The SiPM shows a very small temperature coefficient which is one of the main advantages of the device.
Since our later application for the SiPMs is a prototype of a small animal Positron-Emimission Tomograph for simultaneous PET/MRI (Magnetic Resonance Imaging), we also aquired energy spectra with LYSO and different radioactive sources. The SiPM shows promising performance.
We will present our results as well as measurement methods.
Author
Florian Schneider
(TU München Klinikum rechts der Isar Nuklearmedizin)
Co-authors
Dr
Dieter Renker
(TU München Physik Department E17)
Prof.
Sibylle Ziegler
(TU München Klinikum rechts der Isar Nuklearmedizin)
