CITIROC is a 32-channel front-end ASIC designed to readout silicon photomultipliers (SiPMs) for single photon detection. Citiroc has an innovative 2-level trigger allowing to trig on the single photon and to validate the event on a second level trigger at higher energy allowing a precise time measurement and a good noise rejection.
An adjustment of the SiPM high-voltage is possible using a channel-by-channel DAC connected to the ASIC inputs. That allows a fine SiPM gain and dark noise adjustment at the system level to correct for the non-uniformity of SiPMs.
Timing measurement better than 100ps RMS jitter one single photon is possible along with 1% linearity energy measurement up to 2500 ph-e. The power consumption is about 2mW/channel, excluding ASIC outing buffer.
|TRL Technology Readiness Level||8 - Full system using ASIC running - learn more|
|Detector Read-Out||SiPM, SiPM array|
|Number of Channel||32|
|Sensitivity||Trigger on 1/3 photo-electron|
|Timing Resolution||better than 100ps RMS on single photo-electron|
|Dynamic Range||0-400 pC i.e 2500 photo-electrons @ 106 SiPM gain|
|Packaging & Dimension||
|Inputs||32 voltage inputs with independant SiPM HV adjustments|
|Internal Programmable Features||
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