Speaker
Description
The Super Tau-Charm Facility (STCF) is a new-generation of electron-positron collider operating in a center mass of energy range from 2 to 7 GeV with a peak luminosity of 0.5×1035 cm-2 s-1 at 4 GeV. The high physics event rate in the presence of high beam background poses a big challenge to the STCF trigger system. In light of the data features and the simulated beam background level in STCF, a FPGA-based hardware L1 trigger architecture was developed for the STCF experiment. The STCF L1 trigger system consists of two sub-trigger logics based on the main drift chamber (MDC) and the electro-magnetic calorimeter (ECAL), respectively, and a global trigger logic (GTL). A L1 trigger prototype system based on common readout board (CROB) was also developed to test the efficiency and latency of trigger algorithms. The MDC sub-trigger logic uses the information of stereo super layers in the MDC, achieving 99% tracking efficiency for tracks with pt above 150MeV/c with a latency of approximately 550 ns. By employing a region-based cluster identification and segmentation method, the ECAL sub-trigger logic has achieved low resource utilization of FPGA and a short latency of less than 150 ns. With an optimized matching logic and trigger table, the GTL can realize a signal trigger efficiency of higher than 99% for most events with charged tracks and higher than 97% for neutral events. The beam background trigger rate can be suppressed to be below 30 kHz.
| Position | Phd Student |
|---|---|
| Affiliation | University of Science and Technology of China |
| Country | China |