Module convenor: Roman Lietava (Birmingham) and Karim Massri (CERN)
Module Code: TR
Duration (Hours): 10 hourly sessions
Start Date and Commitments
Start: on 12/1/2024 - 10 lectures on Fri 11-12
To provide an introduction to the principles of triggers for high energy physics experiments, to study how triggers are implemented in LHC experiments, and to look at future directions in triggering. In addition the assumptions and methods for Van der Meer scans will be discussed.
You can find the lecture notes online at http://epweb2.ph.bham.ac.uk/user/ovb/trig/
Motivation for triggers in high energy physics experiments
Basic trigger concepts: coincidences, dead time management
Examples: NA57; OPAL
Requirements at the LHC.
Examples: ALICE SPD and TRD triggers: ATLAS L1 calorimeter trigger
Future directions in trigger development
Luminosity measurement with Van der Meer scans.
Syllabus in more detail:
Why triggers are necessary, simple triggering scheme with time budgeting, dead time, advantages of multi-level triggers, advantages of buffering, examples from CERN fixed target experiments, timing at the CERN LEP collider, deadtimeless triggers, trigger timing in the OPAL experiment, timing in an LHC experiment, the RD-14 TTC project, LHCb restrictions, examples of LHC triggers (the ALICE pixel trigger, the ATLAS L1 Calo trigger, the ALICE TRD trigger, High Level triggers, triggering in the Auger experiment, plan for CBM experiment at GSI, continuous triggers, implementation in LHCb and ALICE, the future of triggering.