RaPico
64-channel SiPM Photodetector Read-out with Radioroc2 and CERN picoTDC
Description
RaPico is a 64-channel system designed to readout silicon photo-multipliers (SiPM) for scientific instrumentation application. LiPico is a stack of two boards. The front-end board house on the top side the 64-channel detector (SiPM are interchangeable) and the readout ASIC (Radioroc 2) followed by CERN PicoTDC. PicoTDC will convert triggers from Radioroc 2 into a digital time of arrival (TOA) and a time over threshold (TOT).
Time resolution of the board is 12ps with a 700ps dead time. LiPico is connected to a Xilinx Evalutation (ZC702) board for data acquisition and the data is transmitted via an Ethernet to a computer. A CAEN high-voltage module can be provided in the kit.
The supplied software allows system calibration, ASIC programming and data acquisition with a graphical user interface providing various time information.
All firmware and software are open-source, allowing for customer modifications.
Parameters
| Parameters | Value |
|---|---|
| Detector Read-Out | 64 channels SiPM, customer choice. Already available: S13361-1350AE-08 (Hamamatsu) ; AFBR-S4K11P6425B (Broadcom) |
| Number of Channels | 64 |
| Signal Polarity | Positive |
| Sensitivity | Trigger on 1/3 photo-electron, 100% efficiency on first photon |
| High Voltage | CAEN A7585DU – 85V – 10mA max. Temperature compensation |
| Dynamic Range | Up to 2000 photo-electron |
| Single Photon Time Resolution (SPTR) | 58 ps (FWHM) |
| Maximum Double pulse separation within same pixel | 3 ns |
| Power Consumption | FrontEnd Board : 1,5A @ 5V ; ZC702 : External power supply |
| Outputs | 2 USB output, Ethernet Link |
| Internal Programmable Features (Python Software) | 64 HV adjustement for SiPM (64x8bits), trigger threshold adjustement (10bits), channel by channel gain tuning, 64 triggers masks, high voltage setpoint, number of acquisitions, staircase, TDC binning configuration, t0 controlled by trigger, output trigger available for Laser control |
Diagram
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