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− | <big>'''<u>This page is currently under construction </u>'''</big>
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− | <u> Level 1 Trigger Group </u>
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− | * Physics: D.Doughty, A.Somov
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− | * Electronics & DAQ divisions (JLAB): C. Cuevas, A.Gupta, M.Taylor, J.Wilson, H.Dong, E.Jastrzembski, F.Barbosa, B.Raydo, D.Abbot
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− | <big> [http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX-Online-Workshop-2009 Trigger Workshop, 8 July 2009 ]
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− | * [http://www.jlab.org/Hall-D/meetings/online_workshop2009/Registration/Register.php Registration Page ] </big>
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− | === Level 1 Trigger Goal ===
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− | The main goal of the GlueX experiment is the search of exotic mesons
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− | produced in interactions of 8.4 - 9.0 GeV linearly polarized beam
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− | photons with a liquid hydrogen target. The beam photons are
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− | created by the 12 GeV electrons incident on a diamond crystal via
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− | bremsstrahlung process.
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− | The GlueX detector will start taking data at a luminosity
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− | corresponding to about 10<sup>7</sup> photons per second in the photon-beam
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− | energy range of 8.4 ''<'' E<sub>''γ''</sub> ''<'' 9.0 GeV. The Level-1 trigger has to
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− | reduce the rate from electromagnetic and hadronic interactions seen
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− | by the GlueX detector to a level acceptable by a data acquisition for
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− | writing events directly to tape, about 20 kHz. Later, the luminosity
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− | will be increased by an order of magnitude to 10<sup>8</sup> photons per second.
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− | For high-luminosity runs, events accepted by the Level-1 trigger will
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− | be sent to the thirt level trigger at the rate which should not exceed
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− | 200 kHz. The Level-3 trigger will perform an event reconstruction
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− | on a PC farm allowing to further resuce low-energy photon interactions
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− | and providing an additional rate reduction of about factor of 10.
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− | At the same time, the Level-1 trigger has to accept all multi-particle
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− | exotic meson candidates produced in the beam energy range E ''>'' 8 GeV.
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− | === Trigger Algorithm ===
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− | === Trigger Hardware ===
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− | === 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]
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− | <!-- [http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX-Online-Workshop-2009 Trigger Workshop, 8 July 2009 ] [http://www.jlab.org/Hall-D/meetings/online_workshop2009/Registration/Register.php Registration Page ] -->
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− | Trigger Electronics Meetings [http://www.jlab.org/Hall-D/software/wiki/index.php/Electronics_Trigger_Meetings Minutes ]
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− | === Useful Links ===
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− | == Manuals ==
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− | [https://coda.jlab.org/wiki/Downloads/docs/manuals//Programming%20the%20FADCV2_3.pdf register map for FADC250 V2]
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− | [https://coda.jlab.org/wiki/Downloads/docs/manuals//f1tdc_v1_2-2.pdf F1TDC v1.2 ]
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