Difference between revisions of "July 9, 2019 DIRC"

Latest revision as of 12:50, 9 July 2019

Meeting Information

GlueX DIRC Meeting
Tuesday July 9, 2019
1:00 pm, EDT
JLab F326

Connection Using Bluejeans

1. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 846453895.
2. To join via a Web Browser, go to the page [1] https://bluejeans.com/846453895 .
3. 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
4. More information on connecting to bluejeans is available.

Agenda

1. Announcements
2. Installation work:
   • Mirror cleaning: (Greg)
     • Initial cleaning with Isopropyl
     • Current status after initial Hastilite cleaning
     • Further cleaning options:
       • Disassemble mirror strongback for better access and try further cleaning with Hastilite
       • Relative reflectivity measurement for areas with discoloration and residue Bill
       • Place mirror assembly in water (fish tank?) and evaluate effect of discoloration on reflectivity underwater
   • Tests of composition from oxidized surfaces (Eugene)
   • Epoxy test samples to prevent corrosion of exposed aluminum surfaces (Tim, Bill, All)
     • 7/1: Initiate tests
     • 7/3: First water changeout, no issues
     • 7/5: Second water changeout, no issues
     • 7/8: Damage from contact between SS plate and mirror surface
     • 7/9: Confirmed damage from contact with SS bolt on small sample
   • Next steps:
     • Ship remaining mirror pieces from Bates to JLab
     • Next week: decide on epoxy for pin holes of Upper (North) OB. Apply epoxy and re-install mirror box in OB for installation
     • 2 weeks: after receiving gold-plated screws, install in upper bar boxes and proceed with installing North OB
3. Spring 2019 DIRC Commissioning Analysis (All)
   • Tracking-DIRC alignment study (Yunjie)
   • Commissioning LUT analyses (Ahmed/Roman) | Reconstructed Cherenkov angle Systematics
   • Contributions to Jerry's DIRC review article (Yunjie, All)
4. Software/simulations
   • FastDIRC geometry implementation and alignment work (Cris/Yunjie)
5. Software overview and tasks (All)
6. AOB