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→Dark Box Construction
Running this setup with a hybrid photodiode (HPD) module DEP PP0350 of [[:Image:S20photocathode_QE.jpg | known characteristics]] allows us to calibrate the light intensity. The SiPM detection efficiency can then be characterized relative to the HPD. The signal from the SiPM was clean enough to distinguish peaks corresponding to discreet photon (pixel) counts in the histogram signal integrals. Therefore, the gain of the SiPM was found independently of the HPD - the SiPMs were self-calibrating! The [[#SiPM_Measurements|measurements section]] below describes this feature further.
Running this setup with a hybrid photodiode (HPD) module DEP PP0350 of [[:Image:S20photocathode_QE.jpg | known characteristics]] allows us to calibrate the light intensity. The SiPM detection efficiency can then be characterized relative to the HPD. The signal from the SiPM was clean enough to distinguish peaks corresponding to discreet photon (pixel) counts in the histogram signal integrals. Therefore, the gain of the SiPM was found independently of the HPD - the SiPMs were self-calibrating! The [[#SiPM_Measurements|measurements section]] below describes this feature further.
Below are the diagrams of the dark box with the HPD and SiPM assemblies installed. A temperature controller system (TE Tech. [http://www.tetech.com/temp/tc24-12.shtml TC-24-12]) was procured, which operates by driving a Peltier junction based on feedback from a thermistor compared to voltage-specified reference temperature. It was [[:media:Tc2412calib.pdf|calibrated]] and [[:Image:TempControllerMounted.jpg|installed into the wall]] of the dark box via a custom-designed light-tight frame.
Below are the diagrams of the dark box with the HPD and SiPM assemblies installed. A temperature controller system (TE Tech. [http://www.tetech.com/temp/tc24-12.shtml TC-24-12]) was procured, which operates by driving a Peltier junction based on feedback from a thermistor compared to voltage-specified reference temperature. It was [[:media:Tc2412calib.pdf|calibrated]] and [[:Image:TempControllerMounted.jpg|installed into the wall]] of the dark box via a custom-designed light-tight frame.