Speaker
Da Yu Tou
(Tsinghua University)
Description
The current Upgrade I data-taking of the LHCb experiment uses a fully software trigger to perform a real-time analysis of LHCb detector data at an input rate of 5TB/s which corresponds to an event rate of 30MHz. This trigger is implemented in two stages. The High Level Trigger 1 (HLT1) performs a partial but high throughput reconstruction on GPUs to inclusively select events. The HLT2 then performs a full offline quality reconstruction on CPUs and exclusively select events via a few thousand different triggers. The high quality reconstruction in both stages is possible thanks to the offline quality detector alignment and calibration of the LHCb experiment that is performed in real-time.
Primary author
Da Yu Tou
(Tsinghua University)
