TPC
General Information
This page serves as a centralized page for TPC group's meetings (starting May 1, 2019).
TPC Group Hypernews [Used before October 2019]
https://www.star.bnl.gov/HyperNews-star/protected/get/startpc.html
TPC Group Mailing List
star-tpc-l@lists.bnl.gov
TPC Group Meetings
2020
2019
- 2019-12-18
- 2019-12-11
- 2019-12-04
- 2019-11-27
- 2019-11-20
- 2019-11-13
- 2019-11-06
- 2019-10-30
- 2019-10-23
- 2019-10-09
- 2019-10-02
- 2019-09-25
- 2019-09-18
- 2019-09-11
- 2019-09-04
- 2019-08-28
- 2019-08-14
- 2019-08-07
- 2019-07-31
- 2019-07-24
- 2019-07-17
- 2019-07-10
- 2019-07-03
- 2019-06-26
- 2019-06-19
- 2019-06-12
- 2019-05-29
- 2019-05-22
- 2019-05-15
- 2019-05-08
- 2019-05-01
TPC meetings are held on Wednsesdays at 15:00 Eastern Time. Meeting room 1-189 in physics building 510 @ BNL.
The Bluejean connection
Title: STAR TPC Weekly
Description: Weekly TPC meeting for the STAR Collaboration
Community: STAR
Phone Dial-in
+1.408.740.7256 (US (San Jose))
+1.888.240.2560 (US Toll Free)
+1.408.317.9253 (US (Primary, San Jose))
Meeting ID: 628 045 566
Direct link: https://bnl.bluejeans.com/628045566
tpc weekly
virtual , at 20:00 (GMT), duration : 00:00
-- hardware
-- software
Minutes
TPC weekly meeting
Hardware; Alexei excused. Is working on laser and gas system
The GG driver modules have been installed (Christian, as Tim is out) One module does not provide HV. There are two spare modules.
David is communicating with Tonko how best to provide the SC for the Gating Grid.
Software
Irakli had at LBNL meeting; provided an update to me after meeting
“I talked to Yuri last week about progress and the calculation of the distortions.
I also pointed out to him a little problem in the reading of the inner sector position parameters from the database. We reached out to Dimitry and he changed the readout for that table. It hopefully was not affecting anything, but now I have a good way to compare apples to apples as far as the inner sector position parameters are concerned.
While doing so I noticed that that is where a huge shift in z direction originates, so now I want to see if that is the right result or an artifact from what I've been saying – one can end up in a local minima for the alignment procedure. I will keep you guys updated I the days to come. I am running these jobs as fast as possible (Dmitry's fix has been applied only Monday).”
Yuri presented some intermedial results on his investigations of showing effect of his modified equations as discussed in the previous meeting 12/9/2020 that also have the documents
https://www.star.bnl.gov/~fisyak/star/Tpc/Distortions/
Unless there are updates we need to discuss in person this was the last TPC meeting for 2020. Please send updates to the mailing list until then 1/5/2021
zoom info
TPC weekly
zoom meeting, at 20:00 (GMT), duration : 00:00
Agenda:
-hardware status
- software
--- alignment progress
--- https://drupal.star.bnl.gov/STAR/system/files/he34embedding4th.pdf
--- AOB
TPC meeting minutes December 9, 2020
Hardware:
Alexei is done with laser maintenance on West side; waiting for etof re-install to be complete on East (done)).
Bob and Tonko finishing the work on Westside, which will close first. One more slicing to be done Wed. Still 5 splicing to be done on East side
Irakli have reported to Yuri he is revisiting the alignment (inner-outer) from the cosmics.
Yue-Hang gave update on 3He eff . Guannan had looked at effect on RMS ped in Sl10k in embedding and see no effect. In never libraries the RMSX cut look ok excepts for eta~0 .
At eta ~0 there may be other issues- as seen for other particles. Yuri points out there may be influence of prompt there |z| > 135, though issues are seen at up to ~20cm (??) from readout chambers.
Yuri reported on work on space charge correction and reports there could be a difference between East and West corrections. It is work in progress. Initial report is posted on meeting page, as well as some note by Jim Thomas from ALICE work on this subject.
| Time | Talk | Presenter |
|---|---|---|
| 15:20 | TPC Distortions (progress report) ( 00:20 ) 2 files | Yuri Fisyak |
TPC weekly
virtual , at 20:00 (GMT), duration : 00:00
Minutes:
Tim reported on Gating Grid status
Crate has all modified modules. It was tested locally.
The web based script by Tonko does not seem to work after the upgrades. He is aware of it.
The polarity is swtiched at the connector for all.
The sector 8 is special and should be checked.
FV will contact David on the slow control of the gating grid; how should it be implemented?
Alexei has been working on laser system
- optics replaced; signal looks good
- started with alignment of akll rafters
- propbably will need another week
Software
- no discussion as some key people could not join the meeting today. There was a longer discussion on the run-19 alignment at the monthly S&C meeting
- It is of high priority to get this resolved; will have as agenda point next week
TPC weekly
remote only, at 20:00 (GMT), duration : 00:00
Title: STAR TPC Weekly
Description: Weekly TPC meeting for the STAR Collaboration
Community: STAR
agenda:
- hardware
hardware progress
- software
update on 3He effeciency; Yue Hang
https://drupal.star.bnl.gov/STAR/system/files/he34embedding3rdnew_1.pdf
minutes
TPC meeting Nov 18, 2020
-hardware
Alexei and Nicolai another test round on adding SF4 to P10 at outer sector in clean room. Had to use +65V to get same gain as P10. Still some issues if this is ok. And will do another set of measurements in 2 weeks or so
Also working to get laser system back into shape.
Tim is installing gating grid drivers. Flemming confirmed that David is involved in get the SC for GG up and running. We should contact him for progress.
-software
Presentation by Yue on further check on the 3He, 4He efficiency and issues.
Presentation is linked on meeting web page.
Presented nicely where the consequences show us where there are differences splittracks, 3He vs. protons. There is still no understanding how the change in pedestal should affects stuff.
Discussion on run-19 alignment. Irakli has done a bit more work; he and Yuri are having discussion. Yuri shows some preliminary work documenting the different mass splitting depending on library version and corrections applied.
No meeting on Wed 25 just before thanksgiving.
Xin would like to have an updated report at next S&C meeting (not 25 either)
Phone Dial-in
+1.408.740.7256 (US (San Jose))
+1.888.240.2560 (US Toll Free)
+1.408.317.9253 (US (Primary, San Jose))
Meeting ID: 628 045 566
Direct link: https://bnl.bluejeans.com/628045566
TPC weekly
remote only, at 20:00 (GMT), duration : 00:00
TPC weekly
remote only, at 20:00 (GMT), duration : 00:00
Power cables should be crimped (100' and pigtails) as many are bad. El group looking for help
Gating Grid Drivers will be replacd Tim has to maake nesc fixes, should be installed in about 2 weeks
Repairs of RDO and FEE continuing
AL working on optical parts for laser, installing NMR for Mag field calibration, looking at response with outer sector in clean room
added SF4 gas. Nicolai wll come to BNL again next week?
Preliminary report from Yuri on difference between online and offline cluster
https://drupal.star.bnl.gov/STAR/system/files/FCF_online_offline.pdf
3He effeciency https://drupal.star.bnl.gov/STAR/system/files/he34embedding.pdf
TPC weekly
remote only, at 19:00 (GMT), duration : 00:00
Title: STAR TPC Weekly
Description: Weekly TPC meeting for the STAR Collaboration
Community: STAR
Phone Dial-in
+1.408.740.7256 (US (San Jose))
+1.888.240.2560 (US Toll Free)
+1.408.317.9253 (US (Primary, San Jose))
Meeting ID: 628 045 566
Direct link: https://bnl.bluejeans.com/628045566
TPC weekly
remote only, at 19:00 (GMT), duration : 00:00
Title: STAR TPC Weekly
Description: Weekly TPC meeting for the STAR Collaboration
Community: STAR
Phone Dial-in
+1.408.740.7256 (US (San Jose))
+1.888.240.2560 (US Toll Free)
+1.408.317.9253 (US (Primary, San Jose))
Meeting ID: 628 045 566
| Time | Talk | Presenter |
|---|---|---|
| 15:00 | Run-19 Alignment Mistery ( 00:20 ) 0 files | Irakli |