Difference between revisions of "2011 Hall B FCAL Beam Test"
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== Geometry == | == Geometry == | ||
+ | The geometry for the Hall B tagger and our detector setup is shown in | ||
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+ | [[FCAL Beamtest Geometry]] | ||
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[[File:Geometry.png|750px|thumb|left|Hall B Geometry]] | [[File:Geometry.png|750px|thumb|left|Hall B Geometry]] | ||
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Revision as of 14:54, 9 November 2011
Contents
2011 Hall B FCAL Beam Test
Test out 25 FCAL modules using Hall B electron beam.
Schedule
Beam
- 2011/11/19 (Sat) beam start
- 11/19/2011 (Sat) 11/20/2011 (Sun) COMMISSIONING
- 11/21/2011 (Mon) 12/04/2011 (Sun) 4446 4 Lin 14
- 12/05/2011 (Mon) 12/18/2011 (Sun) 4446 4 Lin 14
- 12/19/2011 (Mon) 12/21/2011 (Wed) 4446 4 Lin 3
- 12/22/2011 (Thu) 01/03/2012 (Tue) WINTER DOWN
- 01/04/2012 (Wed) 01/13/2012 (Fri) 2528 3 Cir 10 special Hall A Ee
- 01/14/2012 (Sat) 01/24/2012 (Tue) 2254 2 Cir 11
- 01/25/2012 (Wed) 01/26/2012 (Thu) 4446 4 Lin 2 special Hall A
- 01/27/2012 (Fri) 02/10/2012 (Fri) 2254 2 Cir 15
- 02/11/2012 (Sat) 02/24/2012 (Fri) 5542 5 Lin 14
- 02/25/2012 (Sat) 03/09/2012 (Fri) 5542 5 Lin 14
- 03/10/2012 (Sat) 03/23/2012 (Fri) 5542 5 Lin 14
- 03/24/2012 (Sat) 04/06/2012 (Fri) 5542 5 Lin 14
- 04/07/2012 (Sat) 04/14/2012 (Sat) 4446 4 Lin 8
- 04/15/2012 (Sun) 04/16/2012 (Mon) EXCHANGE TARGET, NO BEAM
- 04/17/2012 (Tue) 04/18/2012 (Wed) 4446 4 Lin 2
- 04/19/2012 (Thu) 04/20/2012 (Fri) 4446 4 Lin 2
- 04/21/2012 (Sat) 04/22/2012 (Sun) 4446 4 Lin 2
- 04/23/2012 (Mon) 04/24/2012 (Tue) 5542 5 Lin 2
- 04/25/2012 (Wed) 04/26/2012 (Thu) 5542 5 Lin 2
- 04/27/2012 (Fri) 04/28/2012 (Sat) 5542 5 Lin 2
- 04/29/2012 (Sun) 04/30/2012 (Mon) 5542 5 Lin 2
- 05/01/2012 (Tue) 05/04/2012 (Fri) 2254 2 Cir 4
- 05/05/2012 (Sat) 05/09/2012 (Wed) INSTALL RASTER, SET BEAMLINE, NO BEAM
- 05/10/2012 (Thu) 05/17/2012 (Thu) 2254 2 Lin 8 e+ HD performance tests
- 05/17/2012 (Thu) Start of 12 GEV SHUTDOWN
Construction
- Target date to finish construction - 11/02/2011 (Wed)
- Drive from IU to JLab for installation - 11/08/2011 (Tue)~
Setup
Pictures of setup to hold detector and trigger scintillators. Built by John Frye and the machine shop at IU, and shown here:
Electronics
- Have put together NIM modules at IU, no need to borrow any NIM modules
- Have tested inputs/outputs, all units working
- Output widths of all NIM modules with adjustable widths set to 50 ns. As long as the rate of electrons coming in is less than 20 MHz, we should be fine (the total rate on the CLAS tagger should be on this order).
- All thresholds on discriminators have been adjusted to 50 mV.
- List of electronics are shown here:
List of FCAL Beamtest Electronics
Geometry
The geometry for the Hall B tagger and our detector setup is shown in
Beam Rates
- The difference between the two figures seems to stem from the scintillating fibres having
directional dependence on the incoming electrons. Without any veto on the incoming electron direction, it seems we will be saturated with scattered electrons.
- Also note that these measurements were done near the end of the beam, where there is
lots of scattering as the main beam exits the vacuum.
Modules
Each of the PMT/base combinations for the
- 25 detector modules
- 10 trigger scintillator modules
- There are 3 remote trigger paddles, all with different dimensions.
- Thick - 1.760" * 0.98"
- "Medium" - 0.880" * 0.109"
- "Thin" - ???" * ???"
have been tested in tandem for gain adjustments. The position, base ID, PMT ID, and cable number are listed here:
List of FCAL Beamtest Component IDs
Gain Adjustments
Gains for each PMT/base combination have been tested. We placed two trigger paddles on top of each other, and varied the HV on the one we are testing, while keeping the other held at 1700 V. The coincidence rates for cosmic rays were taken, and plotted against HV. The figures are here:Gain Adjustments, with a table of HV values.
Links
- Proposal Document on GlueX docDB (contains 1 page executive summary)
- Kei Moriya Talk at GlueX Collaboration Meeting 2011 October@JLab
- Hall B HD-ICE webpage
- Hall B HD-ICE wiki, with link to run schedule
Personnel Available for Datataking
- IU
- Kei Moriya (time centered around November 7th not available due to birth of child)
- Regina
Temporary Operating Safety Procedure
Links to EHS&Q manual:
- Chapter 3310 Operational Safety Procedure Program
- Chapter 3210 - Work Panning, Control and Authorization
- JLab's OSP archive Specifically, which include the "new" work control document format ... documents 61-80
- Specific examples