Difference between revisions of "Level 1 Trigger"

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<big>'''<u>This page is currently under construction </u>'''</big>
 
  
 
 
 
<u> Level 1 Trigger Group </u>
 
 
* 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
 
 
 
 
<big> [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 ] </big>
 
 
 
=== 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<sup>7</sup> photons per second in the photon-beam
 
energy range of 8.4 ''&lt;''  E<sub>''&gamma;''</sub>  ''&lt;'' 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 10<sup>8</sup> 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 ''&gt;'' 8 GeV.
 
 
 
=== Trigger Algorithm ===
 
 
=== Trigger Hardware ===
 
 
=== Reviews and Meetings ===
 
 
System and Integration Review, 7-9 May 2008 [http://www.jlab.org/Hall-D/software/wiki/index.php/Subsystem_Review Review Site]
 
 
<!-- [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 ] -->
 
Trigger Electronics Meetings  [http://www.jlab.org/Hall-D/software/wiki/index.php/Electronics_Trigger_Meetings Minutes ]
 
 
=== Useful Links ===
 
== Manuals  ==
 
[https://coda.jlab.org/wiki/Downloads/docs/manuals//Programming%20the%20FADCV2_3.pdf register map for FADC250 V2]
 
 
[https://coda.jlab.org/wiki/Downloads/docs/manuals/f1tdc_v1_2.pdf F1TDC v1.2]
 

Latest revision as of 13:19, 9 December 2011