July 2, 2014 Calibration

GlueX Calibration Meeting
Wednesday, July 2, 2014
11:00 am, EDT
JLab: CEBAF Center, 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: 630804895.
2. To join via a Web Browser, go to the page [1] https://bluejeans.com/630804895.
3. To join via phone, use one of the following numbers and the Conference ID: 630804895
   • 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. Status Update
   • Constants_to_Review
3. Tracking
   • Cosmics Running
   • CDC radial field drift-time diffs
   • CDC drift-time & B field doc
4. Calorimetry
5. Other systems
6. Simulations and Calibrations

Minutes

1. Announcements
   • Mark has tagged CCDB v1.02. This primarily fixes bugs related to the use of different variations in JANA_CALIB_CONTEXT.
2. Tracking
   • Naomi put together this document which describes her investigations on correcting for B-field variations. She also redid her studies of radial B-field variation with finer resolution and found a maximum difference of 3 ns at maximum drift time.
   • The current time-to-distance tables for the CDC are generated assuming a magnetic field. Simon is being provided with tables corresponding to zero magnetic field. It was noted that the gas mixture in the CDC has a temperature around 296K.
3. Calorimetry
4. Other systems