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= SiPM Performance Requirements =
= SiPM Performance Requirements =
[[Image:SSPM05_(1x1).jpg|thumb|370px|SSPM-050701GR-TO18 from Photonique, SA, with 1 mm<sup>2</sup> active area with 556 pixels]]
[[Image:SSPM05_(1x1).jpg|thumb|370px|SSPM-050701GR-TO18 [http://www.photonique.ch/DataSheets/SSPM_050701GR_TO18_Rev1.pdf] from [http://www.photonique.ch Photonique SA], with 1 mm<sup>2</sup> active area with 556 pixels]]
[[Image:SSPM06_(2x2).jpg|thumb|370px|SSPM-0606BG4-PCB from Photonique, SA, with 4.4 mm<sup>2</sup> active area with 1700 pixels]]
[[Image:SSPM06_(2x2).jpg|thumb|370px|SSPM-0606BG4-PCB [http://www.photonique.ch/DataSheets/SSPM_0606BG4MM_PCB_vs1.pdf] from [http://www.photonique.ch Photonique SA], with 4.4 mm<sup>2</sup> active area with 1700 pixels]]
A novel method of low light readout is evaluated here. Traditionally, signals of tens to hundreds of photons are read out by photomultiplier tubes (PMTs), which provide gain of <math>10^6</math> via a cascade of electrons multiplied on collision at each of the device's sequential dinodes. The small cross-section light channels in the high rate tagger microscope that will operate the Hall-D of Jefferson Lab call for a new and more efficient approach. Silicon Photomultipliers (SiPMs) are discussed on the merit of their gain, detection efficiency, speed and noise level.
A novel method of low light readout is evaluated here. Traditionally, signals of tens to hundreds of photons are read out by photomultiplier tubes (PMTs), which provide gain of <math>10^6</math> via a cascade of electrons multiplied on collision at each of the device's sequential dinodes. The small cross-section light channels in the high rate tagger microscope that will operate the Hall-D of Jefferson Lab call for a new and more efficient approach. Silicon Photomultipliers (SiPMs) are discussed on the merit of their gain, detection efficiency, speed and noise level.