PETsys DAQ card (DAQ4)
Core component of the PETsys SiPM readout system
The PETsys DAQ4 card serves as the high-performance interface between front-end electronics and the data acquisition computer. Installed directly into the DAQ computer via a PCIe slot, the module is equipped with a Kintex-7 FPGA that handles high-speed data collection, processing, and transfer operations.
The module features three SFP+ optical/copper connectors, each supporting a daisy-chained network of FEB/D modules transmitting data at 6.6 Gbps. This architecture allows multiple FEB/D modules to connect sequentially over a single optical link, simplifying cabling infrastructure and system scalability. The DAQ board receives data frames from all connected chains, merges them into coherent data streams, and transmits the assembled frames to the host computer through the PCI Express interface. With a maximum event record rate of 230 Mcps and data throughput of 14.7 Gbps, the module can handle extremely high count rates from large detector arrays.
A key feature is the onboard chronological event sorting performed by the FPGA firmware, which organizes events by timestamp before transmission to the computer. This hardware based sorting significantly reduces software processing overhead and improves overall system efficiency.
Together with the Clock & Trigger module and FEB/D modules, the DAQ board forms a complete, scalable data acquisition system capable of managing tens of thousands of SiPM channels in large-scale PET detector installations.
Four SFP+ ports are available in the DAQ card.
Kintex7 FPGA is the core of the DAQ card
Main Features
- Installs directly into DAQ computer via PCIe slot
- Four SFP+ connectors support daisy-chained FEB/D modules at 6.6 Gbps each
- Equipped with Kintex-7 FPGA for high-speed data processing and transfer
- Maximum event rate of 230 Mcps with data throughput of 14.7 Gbps enables handling of high count rates