Difference between revisions of "August 20, 2019 DIRC"
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#** Mirror studies and water tests (Bill, All) [https://logbooks.jlab.org/entry/3709114 Surface voltage test] [https://logbooks.jlab.org/entry/3713852 losing coating] [https://logbooks.jlab.org/entry/3716403 latest update] [https://logbooks.jlab.org/entry/3716606 summary table] | #** Mirror studies and water tests (Bill, All) [https://logbooks.jlab.org/entry/3709114 Surface voltage test] [https://logbooks.jlab.org/entry/3713852 losing coating] [https://logbooks.jlab.org/entry/3716403 latest update] [https://logbooks.jlab.org/entry/3716606 summary table] | ||
#** "Sandwich" (rear surface) mirror option to protect reflective surface (current priority for testing) | #** "Sandwich" (rear surface) mirror option to protect reflective surface (current priority for testing) | ||
| − | #*** Reflectivity measurements and plans for further samples (Bill, All) | + | #*** Reflectivity measurements and plans for further samples ([https://halldweb.jlab.org/DocDB/0035/003581/002/DIRC_meeting_20_Aug.pdf Bill], All) |
#*** Simulation of nominal first surface mirror (black) and sandwich mirror with 1mm glass on top of reflective surface (blue). Single photon resolution not degraded by adding thin glass on top of reflective surface: 8.16 +/- 0.01 mrad for nominal and 8.06 +/- 0.01 mead for 1mm glass sandwich. [[File:Thetac zoom.png]] | #*** Simulation of nominal first surface mirror (black) and sandwich mirror with 1mm glass on top of reflective surface (blue). Single photon resolution not degraded by adding thin glass on top of reflective surface: 8.16 +/- 0.01 mrad for nominal and 8.06 +/- 0.01 mead for 1mm glass sandwich. [[File:Thetac zoom.png]] | ||
#** [https://halldweb.jlab.org/wiki/images/5/53/Expected_lambda_distribution_082019.pdf More on expected wavelength distribution] (Yunjie) | #** [https://halldweb.jlab.org/wiki/images/5/53/Expected_lambda_distribution_082019.pdf More on expected wavelength distribution] (Yunjie) | ||
Revision as of 12:57, 20 August 2019
Meeting Information
GlueX DIRC Meeting
Thursday August 20, 2019
1:00 pm, EDT
Hall D Counting House
Connection Using Bluejeans
- To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 846453895.
- To join via a Web Browser, go to the page [1] https://bluejeans.com/846453895 .
- To join via phone, use one of the following numbers and the Conference ID: 846453895
- US or Canada: +1 408 740 7256 or
- US or Canada: +1 888 240 2560
- More information on connecting to bluejeans is available.
Agenda
- Announcements:
- Fall 2019 run delayed: expected to start DIRC commissioning November 25
- Installation work:
- South OB Mirror replacement update
- All mirrors removed from strongback, preparing for anodizing (Bill, Mark, All)
- Possibility to modify one strongback piece for to allow for LED diffuser (Bill, Stephanie)
- Mirror studies and water tests (Bill, All) Surface voltage test losing coating latest update summary table
- "Sandwich" (rear surface) mirror option to protect reflective surface (current priority for testing)
- Reflectivity measurements and plans for further samples (Bill, All)
- Simulation of nominal first surface mirror (black) and sandwich mirror with 1mm glass on top of reflective surface (blue). Single photon resolution not degraded by adding thin glass on top of reflective surface: 8.16 +/- 0.01 mrad for nominal and 8.06 +/- 0.01 mead for 1mm glass sandwich.
- More on expected wavelength distribution (Yunjie)
- Deadline for decision on mirror replacement is September 5. Complete schedule from Tim after this date for installation before Fall run.
- All mirrors removed from strongback, preparing for anodizing (Bill, Mark, All)
- North box installation progress (Tim, All)
- Planning for extraction of mirror box in situ, for mirror replacement
- Tape (mirror-strongback) in water study (Bill, All) Issue test
- Next steps (All)
- South OB Mirror replacement update
- Spring 2019 DIRC Commissioning Analysis (All)
- Commissioning LUT analyses (All)
- Cherenkov ring fit (Roman)
- Systematics Survey vs Momentum Direction Rotation vs G4 Simulation (Ahmed)
- Commissioning FastDIRC update (Yunjie)
- Commissioning LUT analyses (All)
- Software/simulations
- FastDIRC geometry implementation and alignment work (Cris/Yunjie)
- Software overview and tasks (All)
- AOB
