Difference between revisions of "Level-1 Trigger"

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== Level 1 Trigger ==
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[[Level 1 Group Members]]
 +
 
 +
=== 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 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 ''&gt;'' 8 GeV.
 +
 
 +
=== Hardware Algorithms ===
 +
 
 +
[[Hit pattern]]
 +
 
 +
[[BCAL cosmics]]
 +
 
 +
[[TOF clusters]]
 +
 
 +
[[TAGM / TAGH]]
 +
 
 +
[[PS and ST]]
 +
 
 +
[[ Typical Latency ]]
 +
 
 +
=== Monitoring ===
 +
 
 +
[[Scaler specifications]]
 +
 
 +
[[Scaler server / client]]
 +
 
 +
=== Hardware ===
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[[Private: Crate and channel assignment | Crate and channel assignment]]
 +
 
 +
[[Optical link connections | Optical link connections]]
 +
 
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[[ TS front panel connections | TS front panel connections ]]
 +
 
 +
=== Reviews and Meetings ===
 +
 
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* [[12 GeV Trigger/Online Workshop| 12 GeV Trigger Workshop, CNU, July 2010]]
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* [[GlueX-Online-Workshop-2009 | 12 GeV Trigger Workshop, CNU, July 2009]]
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* [[May 2008 Subsystem Review | Subsystems Review, JLab, May 2008]]
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'''
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* [[Electronics Trigger Meetings|Trigger Meeting Minutes]]
 +
 
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* [[ Trigger Commissioning Meetings|Trigger Commissioning Meetings]]
 +
 
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=== Beam Tests ===
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* [[ Private: Microscope detector beam test | Microscope Hall-B beam test, 2011 ]]
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* [[ Private: FCAL beam test |  FCAL Hall-B beam test, 2011 ]]
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* [[BCAL Beam Tests 2012 | BCAL beam test, 2012]]
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* [[ Private: Pair Spectrometer beam test |  Pair Spectrometer Hall-B beam test, 2012 ]]
 +
 
 +
=== Test Setups ===
 +
* [[ Private: SiPM timing measurements| SiPM timing measurements ]]
 +
* [[ Private: UConn test setup | Uconn test setup ]]
 +
* [[Private: Trigger Test Stands | Trigger Test Stands ]]
 +
 
 +
=== Schedule and Activities ===
 +
* [[ Private: Activities from P3E schedule | Activities from P3E schedule ]]
 +
 
 +
=== Detector Commissioning ===
 +
* [[ Private: Trigger Types | Trigger Types ]]
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* [[ Forward Calorimeter ]]
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* [[ Compton Calorimeter ]]
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* [[ Barrel Calorimeter ]]
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* [[ DIRC Readout ]]
 +
 
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* [[Trigger Commissioning Plans]]
 +
 
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* [https://logbooks.jlab.org/book/halld  Electronic Logbook]
 +
 
 +
=== Manuals ===
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* [[Media:JlabModuleDataFormat.pdf|VME Data Format Standards for JLAB Modules]]
 +
 
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* [https://halldweb.jlab.org/level-1/manuals/F1TDC  F1TDC ]
 +
 
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* [https://halldweb.jlab.org/level-1/manuals/FADC250 FADC 250 ]
 +
 
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* [https://halldweb.jlab.org/level-1/manuals/TI TI manuals ]
 +
 
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* [https://halldweb.jlab.org/level-1/manuals/CTP CTP manuals ]
 +
 
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* [https://halldweb.jlab.org/level-1/manuals/FANIO FANIO manual  ]
 +
 
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* [https://halldweb.jlab.org/level-1/manuals/CAEN1290/caen_v1290.pdf CAEN1290 TDC ]
 +
 
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* [https://coda.jlab.org/wiki/index.php/Linux_Diskless_Setup Linux discless setup ]
 +
 
 +
* [https://clonwiki.jlab.org/wiki/index.php/GE_XVB601 GE XVB601 controller setup (Hall-B page) ]
 +
 
 +
=== Useful Links ===
 +
[[How To]]
 +
 
 +
=== Run Period Trigger Summaries ===
 +
 
 +
* [[Spring 2016 Trigger Summary]]
 +
* [[Spring 2017 Trigger Summary]]

Latest revision as of 17:24, 30 July 2018

Level 1 Group Members

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.

Hardware Algorithms

Hit pattern

BCAL cosmics

TOF clusters

TAGM / TAGH

PS and ST

Typical Latency

Monitoring

Scaler specifications

Scaler server / client

Hardware

Crate and channel assignment

Optical link connections

TS front panel connections

Reviews and Meetings

Beam Tests

Test Setups

Schedule and Activities

Detector Commissioning

Manuals

Useful Links

How To

Run Period Trigger Summaries

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