Difference between revisions of "Level 1 Trigger"

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(Reviews and Meetings)
(Reviews and Meetings)
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System and Integration Review, 7-9 May 2008 [http://www.jlab.org/Hall-D/software/wiki/index.php/Subsystem_Review Review Site]
 
System and Integration Review, 7-9 May 2008 [http://www.jlab.org/Hall-D/software/wiki/index.php/Subsystem_Review Review Site]
  
Trigger Workshop, 8 July 2009 [[Topics to be discussed ]]
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Trigger Workshop, 8 July 2009 [[Topics for discussion ]]
  
  

Revision as of 12:25, 1 June 2009

Level 1 Trigger Group

  • Physics: D.Doughty, A.Somov
  • Electronics & DAQ divisions (JLAB): C. Cuevas, A.Gupta, M.Taylor, J.Wilson, H.Dong, E.Jastrzembski, F.Barbosa, B.Raydo, D.Abbot


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 10^7 photons per second in the photon-beam energy range of 8.4 < Egamma < 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 tabe, about 20 kHz. Later, the luminosity will be increased by an order of magnitude to 10^8 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 resuce 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.


Trigger Algorithm

Trigger Hardware

Reviews and Meetings

System and Integration Review, 7-9 May 2008 Review Site

Trigger Workshop, 8 July 2009 Topics for discussion


Trigger Electronics Meetings Minutes

Useful Links