Speaker
Mr
Ilia Britvitch
(ETH, Zurich, Switzerland)
Description
Recently developed multipixel Geiger-mode avalanche photodiodes (GAPDs) are very
promising candidates as detectors of the light from scintillating crystals or fibers
in medical imaging (e.g. positron emission tomography) as well as in high energy
physic and astrophysical applications. They are specially well suited for
morpho-functional imaging (multimodality PET/CT, SPECT/CT, PET/MRI, SPECT/MRI ...).
GAPDs have many advantages over conventional photosensors such as photomultiplier
tubes because of their compact size, low power consumption, high quantum efficiency
and non-sensitivity to magnetic fields. Compared to avalanche photodiodes and PIN
diodes they are advantageous because of their high gain and reduced sensitivity to
pick up noise. We present the results of measurements of the basic GAPD
characteristics: photon detection efficiency, gain, inter-cell crosstalk, dynamic
range, timing resolution, recovery time, dark count rate and dark current.
Author
Mr
Ilia Britvitch
(ETH, Zurich, Switzerland)
Co-authors
Dr
Alexey Stoykov
(PSI, Villingen, Switzerland)
Dr
Dieter Renker
(PSI, Villingen, Switzerland)
Prof.
Eckart Lorenz
(ETH, Zurich, Switzerland)
