Star-tpc-l mailing list

[videbaek <videbaek AT bnl.gov>]

TPC weekly meeting 9/7/2023
Present: Alexei, Jim, Gene, Yuri & Flemming

Hardware:
Alexei working on tuning lasers, tuning intensities, drivers o west 
side.
Revisiting CCD camera pictures taking at various times, with different 
filed configs. In total about 8-9. Will present findings next week.
Yuri and Alexei inspected TCP and supports. 4 points setup for each, 1 
points fixed (for each) others can expand/move

Got delivery of methane, but in 12 pack w/o wheels. Not useful, will be 
returned. Attempt to get enough inventory one site for next years  
(24-25) running.

Yuri presented findings of analysis of RF and FF cosmics
Presentations at 
https://drupal.star.bnl.gov/STAR/system/files/Cosmics_2023_RF_FF_0.pdf
Main findings:
There are offsets in momentum and dcaXY •
 No explanation yet. Alignment ?
Discussion raised the issue if another survey of TPC+magnet is needed. 
Yuri pointed out previous survey was lacking good magnet survey.
Yuri is also working of FXT TPC response .  Sees difference in vtZ in 
East vs. West tracks and fxt hit errors different than collider data. 
Need to be revisited





--
Flemming Videbaek
senior scientist, emeritus
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596