Star-tpc-l mailing list

[videbaek <videbaek AT bnl.gov>]

TPC meeting June 13, 2024
Present: Yuri, Alexei, Gene, Jim, Flemmig, Tommy, Dan

Hardware:
Worked on magnetometer interface. The RS232 does not seem to work, had 
help from David, Tim. We agree to have shift crew record setting once 
per hour. Now instituted. Stability seems to be in order .1 %% much 
better than current reading. Alexei will pursue options for readout to 
slow control.

Laser:
Laser in general are not great. Weak laser (eats or west?) crew not 
tuning well while taking data.

Electronics:
Kind of steady: loosing maybe 1 RDO per day; being brought back from 
tonko when time available (ie no beam)

Software:

Pp500 run 22 data proceeding. Now on pass 2. Mostly looks good and 
improved, but a few fills semms not to have converged in pass  2. Will 
reapet, but continue to pass 3 with the starting with pass 2 results.  
The beamline calibration also need to be repeated with the pass 2 calib.

Yuri has a new alignment (super sectors) 2024  and applied it to the all 
of the run 19-21 FXT data that showed a large CM track breaking as found 
by the Davis group. It seems to have fixed that problem see 
https://www.star.bnl.gov/~fisyak/star/Tpc/Alignment/FXT_CM_Tracks_splitting/
This is very encouraging. Yuri will continue with look at t0 
adjustments, and once that done like to make a TFG production of about 
100M events on 11.5 GeV data (020) to check results, in particular K0s 
mass dependence on phi-eta .



--
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