First results of scintillator readout with silicon photomultiplier

A new type of silicon device has been realized that has many properties comparable to, or better than, a conventional PMT (Photomultiplier Tube). This paper presents the first results of using these photodetectors in place of a PMT in the readout of scintillators for possible PET (Positron Emission...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2006-02, Vol.53 (1), p.389-394
Main Authors: Herbert, D.J., Saveliev, V., Belcari, N., D'Ascenzo, N., Del Guerra, A., Golovin, A.
Format: Article
Language:English
Subjects:
Avalanche photodiodes
Detectors
Devices
Electric potential
Low voltage
Manufacturing
Microcell networks
Multiplier phototubes
Photodetector
Photodetectors
Photodiodes
Photomultipliers
Positron emission tomography
scintillator
Silicon
Silicon devices
silicon photomultiplier
SiPM
Studies
Timing
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Summary:A new type of silicon device has been realized that has many properties comparable to, or better than, a conventional PMT (Photomultiplier Tube). This paper presents the first results of using these photodetectors in place of a PMT in the readout of scintillators for possible PET (Positron Emission Tomography) applications. This device, the Silicon Photomultiplier (SiPM), is effectively an avalanche photodiode operated in Geiger mode. In Geiger-mode detectors, a very large current signal is produced regardless of the size of the input, giving just logical rather than proportional information. However, the SiPM is subdivided into a large number (1440) of microcells that act as independent and virtually identical Geiger-mode photodiodes. The outputs of all these individual microcells are connected so that the total output signal is the sum of the signals from all of the microcells that were activated. In this way proportional information can be obtained. As a consequence of their design, these detectors have potentially very fast timing, high gain (10 5 -10 6 ) at low bias voltage (~50 V), a high quantum efficiency (35% at 500 nm), excellent single photoelectron resolution and are cheap to manufacture. Here we present results obtained with this new photodetector when used with pulsed LED and scintillator pixels
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2006.869848