Difference between revisions of "Jul 30, 2009 Readout"
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#* FM PMT locations (Pedro) | #* FM PMT locations (Pedro) | ||
#* Updated [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=1291 GlueX-doc-1291] after fixing geometry | #* Updated [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=1291 GlueX-doc-1291] after fixing geometry | ||
| − | #* Selected an angle of about 30 deg of pmt axis to B-field, minimizing the difference between a linear approximation and actual gain dependence vs. angle. This leads to a relatively small bend angle of the light guide which will increase light transmission. The | + | #* Selected an angle of about 30 deg of pmt axis to B-field, minimizing the difference between a linear approximation and actual gain dependence vs. angle. This leads to a relatively small bend angle of the light guide which will increase light transmission. The curved guides (compared to 45 deg mirror), will reduce the amount of light guide in the acceptance of the detector. |
#* Discussion: Factors to be considered are a) actual value of field at location of pmt b) light collection in different light guides c) variation with angle. Note that at the values of the field in this region, the angle dependence is very shallow. | #* Discussion: Factors to be considered are a) actual value of field at location of pmt b) light collection in different light guides c) variation with angle. Note that at the values of the field in this region, the angle dependence is very shallow. | ||
#* Alam has another student working on light collection efficiencies and will hopefully have some results next week. | #* Alam has another student working on light collection efficiencies and will hopefully have some results next week. | ||
Revision as of 12:01, 30 July 2009
Teleconference Time: 11:00 a.m. EST
- ESNET and EVO session
- Phone:
- +1-800-377-8846 : US
- +1-888-276-7715 : Canada
- +1-302-709-8424 : International
- then enter participant code: 77438230# (remember the "#"). Note participant code changed 7/2/09.
Contents
Items for followup from previous meeting
- Ship Baby Bcal to USM (Will to provide payment information to Zisis)
- Make progress on USM MOU document (Elton, Will, Eugene)
Documents to Review
Tentative Agenda
- Announcements
- Review of Action Items
- USM report
- FM PMT locations (Pedro)
- Discussion of Bcal Readout Review
- Simulations
- Discussions on MOU with USM
Minutes
Attending: USM: Alam, Pedro and Manuel; JLab: Elton, Tim, Fernando, John, Beni, Eugene
- Announcements
- None
- Review of Action Items
- Shipping of baby cal: Alam is waiting a response from the University regarding customs
- USM report
- FM PMT locations (Pedro)
- Updated GlueX-doc-1291 after fixing geometry
- Selected an angle of about 30 deg of pmt axis to B-field, minimizing the difference between a linear approximation and actual gain dependence vs. angle. This leads to a relatively small bend angle of the light guide which will increase light transmission. The curved guides (compared to 45 deg mirror), will reduce the amount of light guide in the acceptance of the detector.
- Discussion: Factors to be considered are a) actual value of field at location of pmt b) light collection in different light guides c) variation with angle. Note that at the values of the field in this region, the angle dependence is very shallow.
- Alam has another student working on light collection efficiencies and will hopefully have some results next week.
