The ROSSPAD is a readout module for detecting and measuring the signals from silicon-photomultipliers / multi-pixel-photon-counters. Detector modules can easily be connected to the ROSSPAD via 2 multipin connectors. This interface offers a connection to all 64 input channels and the bias voltage. Events on each channel are detected at a high rate, with a configurable dynamic range between -400pC and -16nC. The system is designed to measure negative input charges.
In spectroscopy mode, the ROSSPAD can readout all 64 channels with a rate of up to 20 000 frames per second. The event energy is digitized with 12-bit resolution, and the pulse-height is transmitted along with the timestamp, number of channels, and frame data. The trigger threshold can be adjusted individually for each of the 64 channels.
In count mode, the number of events over the threshold is readout for all 64 channels. Each channel has a counter which increments each time a trigger pulse is detected. The maximum event detection rate is approximately 20 000 frames per second. The readout interval can be set by the system between 50µs – 1s.
The ROSSPAD provides the acquired data and is controlled via an Ethernet interface. The module is powered by a 5V power supply or a PoE (Power-over-Ethernet) module. It also offers the possibility to synchronize several systems via a sync interface. An API is available, allowing the design of customer-specific readout software. The ROSSPAD can be purchased a complete system with a scintillator and detectors from Hamamatsu or ON semiconductor (SensL). Upon request, the ROSSPAD can be made to fit the other detectors.
|Hamamatsu S14161-6050HS SiPM, SensL MICROFJ-60035-TSV SiPM
|Gamma cameras, spectroscopic detectors, scintillator based pixelated detectors, absorber in Compton cameras
|Number of inputs
|Input charge range
|-400 pC / -4 nC / -8 nC / -16 nC
|200 ns / 400 ns / 800 ns / 1600 ns
|Programmable. 8 bit for each channel
|Ca. 3.2 W
|Max event detection rate
|Ca. 20 000 frames per second
|Charge value ADC resolution
|50 mm x 50 mm x 48.5 mm
|PoE input voltage range
|36 V to 57 V DC