Trigger Outline for May 2008
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Contents
First Level Trigger Review
Introduction
- GlueX Physics
- Photon Beam
- Tagged Bremsstrahlung
- Coherent Bremsstrahlung
- Photon spectrum
- Trigger Design Requirements and Principle
- Backgrounds
- Trigger rate and latency
- Detector components used in the trigger
Trigger Simulation
- Overview
- GEANT detector simulation
- Tagger simulation
- Backgrounds
- Electromagnetic
- Hadronic
- -Pythia tuning
- - hadronic background region (Egamma < 8 GeV)
- - signal region (Egamma > 8 GeV)
- Multiple-event pileup simulation
- Detector Responses (Distributions and Rates)
- Tagger
- FCAL
- BCAL
- TOF
- ST Counter
- The Trigger Algorithm (Correlations Among Subdetectors)
- Operating at low luminosity (10^7)
- Operating at hight luminosity (10^8)
- Trigger Efficiency
- Classify 'signal' decay channels based on (smth. like)
- - multiplicity of charged tracks (photons)
- - events with proton/neutron recoil
Hardware Implementation
- Overview
- Trigger diagram
- Trigger types (?)
- - hadronic trigger
- - minimum bias (Random ?)
- - CDC cosmic
- - subdetector's stand alone ( pedestals, LED (?), etc...)
- Trigger System Hardware Components
- VXS Crates (electronics review ?)
- FADC250 (electronics review ?)
- - Energy Sum Processing
- - Tagger 'Hit-Bit' Processing
- - ST, TOF Track-Count Processing
- Crate Trigger Processor (CTP)
- Trigger Interface Module (TI)
- Signal Distribution
- SubSystem Processors (CTP)
- Global Trigger Processors
- Trigger Supervisor
- Trigger Distribution (TD)
Loading and Testing
- 250 MHz trigger system test
- 200 kHz crate trigger test
- FPGA programming/simulation
- ...
Operation Control / Online Monitor
- Online performance check
- Energy Sum, optical links, etc.
Time Schedule and Manpower
Related Documents
See Dave Doughty's note on the Level 1 trigger design on the GlueX DocDB: GlueX-Doc-1017-v1
Trigger Network System drawings posted by Chris Cuevas GlueX-doc-1013-v1