09 Jan 2019



CMS track trigger development for HL LHC


Supervisor: PPD  I. Tomalin together with Bristol
At the future High Luminosity LHC (HL-LHC), the CMS experiment will reconstruct with high-speed electronics, the trajectories of charged particles detected by its silicon tracker. This reconstruction must be done within a few nanoseconds, so these tracks can be used as input to the L1 trigger system, identifying which proton-proton bunch crossings are of sufficient interest for full detector read-out. This is an immensely challenging task, as the tracker will transmit approximately one trillion measurement points to this electronics per second, which must be processed with a sophisticated track reconstruction algorithm. The student will participate in efforts to make this project a reality -- developing and refining the reconstruction algorithm with C++ software studies on simulated CMS p-p events; writing HLS or VHDL firmware to implement the algorithm on programmable FPGA electronics, and testing it during CMS integration tests of prototype tracker modules with the tracker electronics. The student will also interact closely with people developing the L1 trigger system, so as to understand how changes in the track reconstruction would affect the physics performance of CMS. This project will help the student develop many skills that are valued highly both in particle physics and in the wider world.
Contact: Tomalin, Ian (STFC,RAL,PPD)