STAR Protected
TPC weekly
virtual , at 13:24 (GMT), duration : 00:00
-- hardware
-- run preparation
-- software
+ Gene: Residuals with the iTPC
TPC meeting Jan 20, 2021
Hardware:
Inspection walk tru done. Checked HV. Leak rate is good < 2l/min after rep of valve.
Prepare for low Ar flow Friday, high flow Sunday. Blue sheet Monday
Laser Need to replace 3 windows- ordered. East side very good West some rafters missing due to windows.
Run Prep:
DB for TPC should be initialized. Yuri
Discussed HLT running for cosmics. HLT will be commissioned during cosmics, files should be kept as they are useful.
Discussed the proposal for running FF. With the current schedule for beam injection Friday evening in Blue, and Gas flow starting Tuesday morning at best one can get about ~ 1 day worth maybe 10M. As it will also be the first day of running it will probably be used for commissioning (e.g GMT triggers) the sample can be less. The EPD and BBC installation will also take place Thursday/Friday when magnet has to be off. Yuri said it could be useful for checking but not enough for full calibration.
Gene presented his ongoing study of inner-outer matching looking at very low-luminosity run from 19.6 , and under different conditions. See blog https://drupal.star.bnl.gov/STAR/blog/genevb/residuals-itpc
The 2020 calibration gives large track residual at the lowest pads (1-6 or so), while the ‘old’ does not show this but slightly larger values. Irakli pull up some plot and see similar effects in some of his results (from maybe a year ago).
Yuri is working on alignment. No results yet.
January 20
- RAW to MuDst production
- pp500_production_2017 (physics)
393834 files have been converted out of 654286
Around 60% Completion
- pp500_production_2017 (physics)
2021 - January
Hypernuclei meeting
The meetings are held Friday 10:30am Eastern.
Zoom Meeting Connection Info:
UPC J/psi in dAu 200 GeV paper proposal
Title:
Probing the gluonic structure in deuteron using d+Au ultra-peripheral collisions
UPC J/psi in dAu 200 GeV paper proposal
Title:
Probing the gluonic structure in Deuteron using d+Au ultra-peripheral collisions
PAs:
UPC J/psi in dAu 200 GeV paper proposal
Title:
Probing the gluonic structure in Deuteron using d+Au ultra-peripheral collisions
PAs:
TPC weekly
virtual , at 20:00 (GMT), duration : 00:00
- agenda
Hardware status
Readiness and startup for Run2021
Software update
MinutesTPC meeting January 13, 2021
Hardware status:
HV systems ok. GG drivers fixed/swapped modules and the noisy channels reported earlier is gone. Laser ok. Will work on gas systems, ongoing plan to have Ar flowing by next mid-week, getting blue sheet by Mon 25.
Methan gas flow starting with shifts on Tuesday 26 at 8 am.
Alexei mentioned Jeff had asked for some positions of laser – will forward e-mail to Yuri.
Gene has requested sets of run with GMT trigger that was created for run20, but where commissioning was not complete. A software (trigger code had a flaw, but is now fixed).
The MTD will be available for the startup phase, and for possible other physics runs like O+O should they happen.
Yuri brought up that it will be very useful to have about 3 days of FF cosmics. He was requested to come with a specific goal for tracks/triggers that we can forward to ops group.
Q: When did we last have FF cosmic data?
Gene reminded us that DB should be initialized for this run. Will ask Irakli if he had scripts from last year to do this and get hold of them.
Flemming mentioned that Star ops mgt and star mgt will like to have a review for TPC focused on calibrations and tracking. As Gene pointed out this has not been done in about a decade. It will be an internal STAR committee chaired by Zhangbu.
Yuri informed us that there was an error in his calculations (code, not formulae) and that the
Results presented last week on asymmetric corrections are wrong. They are symmetric in East/West, Thus the issues on the alignments and calibrations still stands as un-resolved.
Gene has started a study of looking at residuals in low-luminosity 19.6 Gev runs and see a split between inner and outer. Seems related to padrow40 correction i.e static distortion due to the gridleak wall. Gene will present results at a later stage of the study.
zoom info
January 12
- RAW to MuDst production
- pp500_production_2017 (physics)
392608 files have been converted out of 654286
Around 60% Completion
- pp500_production_2017 (physics)
SpaceCharge EastWest Symmetry
This is meant to provide a simple document for understanding through basic principles of electromagnetism how the TPC SpaceCharge distortion is symmetric on the east and west sides of the TPC.
TPC QA 2021
This blog is intended to maintain a log of issues that will be identified as the
run progresses. For initial start the process will be as for run20 and 19. See earlier QA blog page
K* Rho00 results comparison 200 GeV Run-11
We will compare the K* analysis step by step:
Our codes at:
/gpfs01/star/pwg/subhash/Public/Kstar_Comparison
TPC weekly
virtual , at 20:00 (GMT), duration : 00:00
-- hardware
-- software
| Time | Talk | Presenter |
|---|---|---|
| 15:00 | TPC Distortions (progress report) ( 00:20 ) 1 file | Yuri Fisyak |
| 15:20 | Alignment Update ( 00:20 ) 1 file | Irakli |
December 29
- RAW to MuDst production
- pp500_production_2017 (physics)
391054 files have been converted out of 654286
Around 60% Completion
- pp500_production_2017 (physics)