The talk will be posted on BNL indico
https://indico.bnl.gov/event/10740/

This page will be used for draft talks

agenda
- hardware status
- software updates
- calibration review

 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.

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