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Calibration status update for Run 14 AuAu datasets
Updated on Wed, 2014-12-17 00:52. Originally created by genevb on 2014-12-17 00:24.
-Gene
- 14.6 GeV AuAu
- ~4 million events, sampling every production run with the st_hltgood file stream, were produced last week using the latest TPC SpaceCharge & GridLeak calibration (see M. Posik's presentation today)
- Any feedback from QA of this sample is welcome (PWGs informed last week of its availability)
- My own simple QA of DCA distributions is shown as a comment on this page
- This sample is being used for the TPC dE/dx calibration
- This sample is being used for the TOF calibrations
- This sample is being used for the BTOW status table determination
- Preferred methods for status tables (L2, emc-check runs) were not recorded during AuAu15; looking at physics files is the tertiary option
- Low energy collisions do not provide a lot of energetic BTOW hits statistics, so this method is not as robust (lesson learned for next heavy ion running)
- Any feedback from QA of this sample is welcome (PWGs informed last week of its availability)
- TPC hit errors remain to be done (needs ~2 days)
- ~4 million events, sampling every production run with the st_hltgood file stream, were produced last week using the latest TPC SpaceCharge & GridLeak calibration (see M. Posik's presentation today)
- 200 GeV AuAu
- You do not have access to view this node (L2 data available)
- TPC Alignment is currently the critical item
- You do not have access to view this node
- New alignment calibration involved use of low luminosity data, which introduced dependence on the TPC SpaceCharge & GridLeak calibration
- SC & GL calibration used was preliminary, using limited data
- TPC group is actively trying to improve on this (see M. Posik's presentation today)
- Inclusion of HFT in tracking has conflicts with the old TPC alignment (e.g. an unjustified global shift in the old alignment causes the PXL to cross, unphysically, inside the beampipe)
- We will need to move forward with whatever new TPC alignment is avaialable in January
- New alignment implies re-starting tracking-related calibrations: TPC drift velocities, ...
- Sector-by-sector TPC GridLeak needs to be finalized (You do not have access to view this node via other high luminosity datasets)
- ...and the rest of the usual calibrations (TOF, TPC dE/dx, hit errors [though new for HFT])
-Gene
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