Difference between revisions of "Level-1 Trigger"
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* [[ Private: FCAL beam test | FCAL Hall-B beam test, 2011 ]] | * [[ Private: FCAL beam test | FCAL Hall-B beam test, 2011 ]] | ||
* [[ Private: Pair Spectrometer beam test | Pair Spectrometer Hall-B beam test, 2012 ]] | * [[ Private: Pair Spectrometer beam test | Pair Spectrometer Hall-B beam test, 2012 ]] | ||
| + | * [[BCAL Beam Tests 2012 | BCAL beam test]] | ||
=== Test Setups === | === Test Setups === | ||
Revision as of 15:12, 5 April 2012
Contents
Level 1 Trigger Goal
The main goal of the GlueX experiment is the search of exotic mesons produced in interactions of 8.4 - 9.0 GeV linearly polarized beam photons with a liquid hydrogen target. The beam photons are created by the 12 GeV electrons incident on a diamond crystal via bremsstrahlung process. The GlueX detector will start taking data at a luminosity corresponding to about 107 photons per second in the photon-beam energy range of 8.4 < Eγ < 9.0 GeV. The Level-1 trigger has to reduce the rate from electromagnetic and hadronic interactions seen by the GlueX detector to a level acceptable by a data acquisition for writing events directly to tape, about 20 kHz. Later, the luminosity will be increased by an order of magnitude to 108 photons per second. For high-luminosity runs, events accepted by the Level-1 trigger will be sent to the thirt level trigger at the rate which should not exceed 200 kHz. The Level-3 trigger will perform an event reconstruction on a PC farm allowing to further reduce low-energy photon interactions and providing an additional rate reduction of about factor of 10. At the same time, the Level-1 trigger has to accept all multi-particle exotic meson candidates produced in the beam energy range E > 8 GeV.
Level 1 Trigger Algorithm
Trigger Hardware
Reviews and Meetings
- 12 GeV Trigger Workshop, CNU, July 2010
- 12 GeV Trigger Workshop, CNU, July 2009
- Subsystems Review, JLab, May 2008
Beam Tests
- Microscope Hall-B beam test, 2011
- FCAL Hall-B beam test, 2011
- Pair Spectrometer Hall-B beam test, 2012
- BCAL beam test
