O2-4592 - adding TOF LTIntegral to time series&skimmed data

[miranov25]

Adding TOF information structure o2::track::TrackLTIntegral ltIntegral=tpctofmatch.getLTIntegralOut() into the

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
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async-2024-ppRef-apass1

[miranov25]

Hello @noferini , @ercolessi @matthias-kleiner

As we agreed I am pushing the TOF information into the TPC time series & skimmed data.
The test looks fine, I will test few correlation and request cherry pick.

New time series:

 treeTimeSeries->Show(0)->
....
 sqrtChi2Match   = -1
 tpcYDeltaAtTOF  = -999
 tpcZDeltaAtTOF  = -999
 mDXatTOF        = -999
 mDZatTOF        = -999
 mTOFLength      = (o2::track::TrackLTIntegral*)0x53aff90
 mL              = 0.000000
 mX2X0           = 0.000000
 mXRho           = 0.000000
 mT[9]           = 0.000000 , 0.000000 , 0.000000 , 0.000000 , 0.000000 ,
                    0.000000 , 0.000000 , 0.000000 , 0.000000
 mTOFSignal      = 0
..

The content looks reasonable so far:

treeTimeSeries->Draw("mL:tgl:abs(qpt)","mL>0","colz")

[shahor02]

@miranov25 you have to apply clang-format. Note that this is adding ~10 non-empty floats per TOF track.

[miranov25]

AddingTPC, Vertex, and TPC-TOF time

• T0 time is for a moment missing .... needs too much coding
  @noferini, do we have preliminary T0 time available at all during tracking, or is it calculated only later on?

 mTOFLength      = (o2::track::TrackLTIntegral*)0x366e2f0
 mL              = 0.000000
 mX2X0           = 0.000000
 mXRho           = 0.000000
 mT[9]           = 0.000000 , 0.000000 , 0.000000 , 0.000000 , 0.000000 ,
                    0.000000 , 0.000000 , 0.000000 , 0.000000

 mTOFSignal      = 0
 mDeltaTTOFTPC   = 0
 vertexTime      = 0
 trackTime0      = 2541.89

[miranov25]

@shahor02, @davidrohr, @wiechula

Could you please review the pull request? I would like to request a cherry-pick of the code. Local tests have been successful without any issues.

Best regards,
Marian

[miranov25]

@miranov25 you have to apply clang-format. Note that this is adding ~10 non-empty floats per TOF track.

Somehow clang is stuck, for a moment. I will add it clang version soon.
For the size we can optimize that size using diff to pion, for a moment it creates 3 % increase in the data volume:

root [16] treeTimeSeries->GetBranch("mT[9]")->GetZipBytes()/float(treeTimeSeries->GetZipBytes())
(float) 0.0340168f

[noferini]

AddingTPC, Vertex, and TPC-TOF time

* T0 time is for a moment missing .... needs too much coding
  @noferini, do we have preliminary T0 time available at all during tracking, or is it calculated only later on?

Hi @miranov25 ,

• FT0-T0 is not yes associated at this stage, in TOF QC we re-match it to TOF tracks by requiring the same BC
• TOF-T0 from combinatorial algorithm is calculated later, at analysis level affter collision is defined. Again, in TOF QC we group tracks close in TOF-time to define collision and test TOF-T0.
  For time-series I would take care to port only FT0-T0 which is quite efficient and provided with a good resolution. I have to check in our code if we can match FT0 and TOF-tracks already in our matching algorithm (I think I do it already for TOF calibs) to simplify your life.

[miranov25]

Hello @shahor02, @noferini, and @wiechula,

I ran clang-format, and everything looks fine—there is no difference before and after formatting:

[O2Physics/latest-master-o2] /scratch/alice/miranov/alicesw/O2/Detectors/TPC/workflow/src $> diff TPCTimeSeriesSpec.cxx TPCTimeSeriesSpec.cxx.clang  
[O2Physics/latest-master-o2] /scratch/alice/miranov/alicesw/O2/Detectors/TPC/workflow/src $>  

This suggests there might be a bug in the build system.

Could this be approved so I can request a cherry-pick for the apass1 production?

Data Volume for mT

Regarding the data volume for the mT, I will apply compression with an estimated factor of 4–8. It is straightforward since we only need to encode very small deltas relative to the expectation:

t = L / <β_ι>  
<β_ι> = β0_ι + (dβ_ι / dp) * Δp  

Here:

• Δp is similar for all particle species.
• The variation around the approximation is minimal, leading to very low entropy, effective residual coding

I will review how this is currently implemented in the AO2D, but it can be coded efficiently in a similar manner. I am prototyping the approach now.

Best regards,
Marian

[alibuild]

Error while checking build/O2/fullCI for 1bc9730 at 2024-12-17 09:05:

## sw/BUILD/O2-latest/log
c++: error: unrecognized command-line option '--rtlib=compiler-rt'
c++: error: unrecognized command-line option '--rtlib=compiler-rt'


## sw/BUILD/O2Physics-latest/log
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:
Error in cling::AutoLoadingVisitor::InsertIntoAutoLoadingState:


## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
++ GRERR=1
++ [[ 1 == 0 ]]
++ mkdir -p /sw/INSTALLROOT/2adc30def61b50088280974134526ccee6e64860/slc8_x86-64/o2checkcode/1.0-local11/etc/modulefiles
++ cat
--

Full log here.

[shahor02]

The fullCI fails due to the failed git fetch of QC.

You have to assign labels.

[miranov25]

For the record - promising formulas for the TOF delta time, delta momentum correction