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2021

STAR SOFTWARE NEWS APR 9, 2021
---------------------
The present release assignment:  
             SL09g_embed (SL09g_2Embed_v10)  ROOT_LEVEL 5.22.00
             SL10c_embed (SL10c_embed_   

New Gating Grid Driver issues


1/31/2021
It was decided to go back to old GG driver

 1/30/2021
Summary and plots of some early cosmics data

TPC weekly

2021-02-10 15:00
America/New York
Wednesday, 10 February 2021
, at 20:00 (GMT), duration : 00:00


agenda
- hardware status
- software updates
- calibration review

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TPC weeklu

2021-02-17 15:00
America/New York
Wednesday, 17 February 2021
, at 20:00 (GMT), duration : 00:00

TPC weekly

2021-02-24 15:00
America/New York
Wednesday, 24 February 2021
, at 20:00 (GMT), duration : 00:00
 minutes:

hardware
- the west laser had a LV power supply with a bad fuse. Alexie got an access fand fixed in < 1 hour
- Alexei monitor gas and will adjust methan concentration slightly.
- new hot channel in sector1. Have asked Tonko to mask out

FF request.
Gene summarized the FF request as it had emerged from the calibration review. It is important to run FF setting to seperate alignment, E*B distortins
but having data from both polarities. Yuri & Gene confirm that the 20M RF is a good sample from RFF and it was concluded we should request a change as soon as practical and on Wednesday access day at latest. Alexei brought up request to at at the time of switch that a high stat laser run ~20k is taken jest before magnet change and another one is taken with FF after the change, and magnet stabilized.

Yuri showed the dedx for his run 20 calibration for collider data and fixed target.There is some room for improvement in particular for the FXT target data.
Yuri showed that the readout of the magnets current fluctuate on a 15 sec time sacle between two distinct values. Current code only has one magnet value per run so it gives rise to distinct bands of say K0_as there is a scale factor between current read and Field suggest to use average value for future.

Gene discussed a Minor problem in sector alignment distortion correction as shown in attached slide on web page.
Looked at run 18 distortion maps and notice a missing featue that he expected namely spikes missing between inner and outer sector. This is due to an un intentional change of code in 2014. Demonstrated with differences that these effect are likely small. One measure of #primary tracks is sub-promille.



TimeTalkPresenter
15:00Run XX dE/dx calibration ( 00:05 ) 0 filesYuri Fisyak
15:05Run XXI Ks0 mass and STAR main magnet current ( 00:05 ) 0 filesYuri Fisyak
15:10Minor problem in sector alignment distortion correction ( 00:20 ) 0 filesG. Van Buren (BNL)

TPC weeklu

2021-03-03 15:00
America/New York
Wednesday, 3 March 2021
, at 20:00 (GMT), duration : 00:00

TPC weekly

2021-02-03 15:00
America/New York
Wednesday, 3 February 2021
, at 20:00 (GMT), duration : 00:00
aAgenda
- hardware status
- run progress
- software
- TPC Review Planning


Charge to committee

  We just formed the STAR TPC calibration review committee. It is timely and critical to look at the offline calibration tasks and issues. The committee is charged to evaluate the readiness of the TPC calibration for the BES-II data production and provide answers to the following questions by the end of March 2021:

 

1.     What is the status of the tracking and production calibration? 

2.     Where is the bottleneck of the TPC calibration procedure? 

3.     Are there enough collaboration manpower and resources for the tasks? 

4.     How are the online/operation/fast-offline/PWGs efforts coordinated to accomplish the goals? 

5.     Is there a clear document of procedures in calibration and what are the unexpected and expected issues in BES-II datasets? What are the steps in calibration, and how are the current responsibilities assigned?

6.     What is the timeline and path toward completion of whole BES-II calibration for production? 

7.     Any lesson learned toward future runs?

 

The members are:

Zhangbu Xu (Chair)

Bill Christie

Carl Gagliardi

Frank Geurts

Marian Ivanov

Ivan Kisel

Tonko Ljubicic 

Maria Stefaniak

Jim Thomas

Qinghua Xu

Xin Dong (ex officio)

Rongrong Ma (ex officio)


Talks and subject area.
Geometry & alignment (Yuri)
•  Drift velocities
•  dE/dx
•  Specifics for Run 19
•  Cosmic data
•  Beam data
•  Laser data
•  What is the procedure for alignment; How is it documented
•  Bottleneck in timely calibrations
•  Validation procedures and QA
•  Lessons and procedures learned from iTPC prototype commissioning
•  Present/summarize clearly the open/unknown issues and potential concerns (all talks)

Surveys done (Flemming)
• Alexei, Jim and Yuri (operation survey)
• Other detectors as calibration tools (GMT, TOF,  BEMC)
• How they are included in the calibration procedure

Correction Distortions (Gene)
• Dynamic distortions: SpaceCharge & GridLeak
• Static distortions

Resources for Online and express stream (Hongwei)
•  Recap of resources
•  Activities
•  Relation to FastOffline

Calibration (Irakli)
•  T0
•  Long bunch timing, FXT and collider BES-II
•  How is express and fast offline used in calibration
•  Resource/tools/datasets use

QA,QC (BES-II)   (Dan)
•  Recap of resources
•  How are working groups involved in this
•  Feedback, requirements to calibrations


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TPC weekly

2021-01-27 15:00
America/New York
Wednesday, 27 January 2021
, at 20:00 (GMT), duration : 00:00
 agenda
-- hardware status
-- startup plans


electronics update (Tonko)
a brief update regarding both TPX (aka outer sectors)
and iTPC (inner sectors) electronics and gating grid.

1) We have the new (Tim's) gating grid connected.
I calibrated it and it looks OK to me. But we should be
a bit weary because we had problems before.
One outcome is that it is relatively noisier at the
opening time than the old GG so one should pay attention.

2) The pulser runs have been taken and the gains
have been established as well as the bad-channel
list. Pretty much the same as last year because
we had no time (COVID and all) to mess with swapping
FEEs to check the problem and see where the
noise comes from: FEE or padplane.

The gains have been loaded into the database.

3) We _did_ swap the broken FEEs and RDOs.
As luck would have it, a single FEE in the ITPC worked
all Fall/Winter but failed as we closed the poletip.
It is masked.

Let's take it from here and see how we stand during

Charge for calibration review

Dear All,

  We just formed the STAR TPC calibration review committee. It is timely and critical to look at the offline calibration tasks and issues. The committee is charged to evaluate the readiness of the TPC calibration for the BES-II data production and provide answers to the following questions by the end of March 2021:

 

  1. What is the status of the tracking and production calibration? 
  2. Where is the bottleneck of the TPC calibration procedure? 
  3. Are there enough collaboration manpower and resources for the tasks? 
  4. How are the online/operation/fast-offline/PWGs efforts coordinated to accomplish the goals? 
  5. Is there a clear document of procedures in calibration and what are the unexpected and expected issues in BES-II datasets? What are the steps in calibration, and how are the current responsibilities assigned?
  6. What is the timeline and path toward completion of whole BES-II calibration for production? 
  7. Any lesson learned toward future runs?

 

The members are:

Zhangbu Xu (Chair)

Bill Christie

Carl Gagliardi

Frank Geurts

Marian Ivanov

Ivan Kisel

Tonko Ljubicic 

Maria Stefaniak

Jim Thomas

Qinghua Xu

Xin Dong (ex officio)

Rongrong Ma (ex officio)

 


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TimeTalkPresenter
15:00Residuals re-tested ( 00:20 ) 0 filesIrakli
15:20Comparison express production TFG19e and calibration production P20ic_calib for 19GeV AuAu2019 data ( 00:20 ) 0 files

January 26

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      394125 files have been converted out of 654286
      Around 60% Completion

STAR-UPC-dAu-PWGC preview presentation

 

STAR-UPC-dAu-Paperdraft

  This page is to document all versions of paper draft. 

STAR-UPC-dAu-AnalysisNote

  This page is for documenting all versions of AN. 

TPC weekly

2021-01-20 08:24
America/New York
Wednesday, 20 January 2021
virtual , at 13:24 (GMT), duration : 00:00
 agenda
-- 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.

 

 

 




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January 20

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      393834 files have been converted out of 654286
      Around 60% Completion

2021 - January

The vote is over, the winner is Xiaoyu Liu.

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

2021-01-13 15:00
America/New York
Wednesday, 13 January 2021
virtual , at 20:00 (GMT), duration : 00:00
 Weekly meeting
- 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.

 

 



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January 12

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      392608 files have been converted out of 654286
      Around 60% Completion