Open tracking and alignment tasks

These tasks are part of the LS1 tasks list. If you interested in any of these tasks please contact Maurizio Martinelli, Silvia Borghi, Tim Gershon and Patrick Koppenburg.

They are split in three depending if they are available, taken or completed.The completed tasks are still there because the analysis is made for 2011 and 2012 data. Anyway, further effort is needed for the post-LS1 data-taking, especially for documenting the analysis and organizing it into a package that could be run almost automatically for the next round of data-taking.

The status of the ongoing activities can be found here.

High Priority

Prepare for 25 ns

Task name Prepare for 25 ns
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Track reconstruction needs to be tested with spillover. Run simulations. Estimate ghost rate (from spillover) and try to reduce it.
Estimated total effort required (FTE) 0.5 FTE for 12 months.
Deadline Summer 2014
People/groups currently involved  
Past studies from Jeroen Van Tilburg.
New effort required? Yes.
Other comments Work in collaboration with detector experts

Investigate problems in track fit

Task name Investigate problems in track fit
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Pulls and chi2 from track fit are not perfect. Especially the TT region looks bad. Already seen in MC.
Estimated total effort required (FTE) 0.4 FTE for 4 months.
Deadline before 2014 reprocessing.
People/groups currently involved Adam Davis.
Past studies from Wouter Hulsbergen.
New effort required? Yes. Adam will continue this works, but more manpower is needed.
Other comments  

Alignment on the GRID

Task name Alignment on the GRID
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Make the alignment available as a GRID job.
Estimated total effort required (FTE) 0.2 FTE for 3 months
Deadline Before end of LS1.
People/groups currently involved  
Past studies from Maurizio Martinelli
New effort required? Yes.
Other comments  

Automatic procedure for Alignment

Task name Automatic procedure for Alignment
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Automation of alignment, to be evaluated per fill during data-taking, for monitoring purpose.
Estimated total effort required (FTE) 0.3 FTE for 9 months.
Deadline Before end of LS1.
People/groups currently involved  
Past studies from Silvia Borghi, Maurizio Martinelli
New effort required? Yes.
Other comments Fundamental for 2015 data-taking

Improve MC association tool

Task name Improve MC association tool
Lead (tools, or other) group Simulation, Software, Tracking and alignment, Upgrade
Other relevant groups (if any) Everybody
Task description The MC association tool is untouched from before the start of data-taking and started to show a few limitations. Work is needed for maintaining it. Idea is to improve such that signal is not categorized as ghosts and vice versa.
Estimated total effort required (FTE) 0.5 FTE for 4 months.
Deadline Expect results beginning of summer (June)
People/groups currently involved Diego Milanes
New effort required? No
Other comments PK: Relevant for upgrade studies. Needs somebody with some computing knowledge.

Review of HLT Tracking

See HLT Tasks

Available

Maintain tracking and alignment monitoring plots (can be shared among people working on monitoring)

Task name Maintain tracking and alignment monitoring plots
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Tracking and alignment plots for DQ need to be maintained and cleaned-up. New plots need to be added. Update documentation and answer to the DQ offline piquet issues.
Estimated total effort required (FTE) 0.5 FTE for 4 months and after that 0.2 months for maintenance.
Deadline Continuous.
People/groups currently involved Jack Timpson Wimberley, Jason Emory Andrews, Silvia Borghi, Pieter David.
Past studies from Wouter Hulsbergen.
New effort required? Yes. The current people do not have enough time for the maintenance.
Other comments This is an ideal task for a student which wants to get involved and understand the tracking and alignment.

Investigate problems in vertex fitting and intervalidation of different fitters

Task name Investigate problems in vertex fitting and intervalidation of different fitters
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description OfflineVertex fitter sometimes produces unphysical cov matrices (see https://savannah.cern.ch/bugs/?94917). Mass constraints in DTF sometimes fail (see https://savannah.cern.ch/bugs/?90439). LokiVertexFitter and OfflineVertexFitter give different results (see https://savannah.cern.ch/bugs/?84606).
Estimated total effort required (FTE) 0.2 FTE for 6 months.
Deadline Before 2013 reprocessing.
People/groups currently involved Wouter Hulsbergen, Vanya Belyaev, Yuehong Xie
Past studies from Wouter Hulsbergen, Vanya Belyaev, Yuehong Xie
New effort required? Yes.
Other comments  

Update in the express stream

Task name Update in the express stream
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Update the express stream to select tracks and pv needed for the Velo alignment
Estimated total effort required (FTE) 0.2 FTE for 2 months
Deadline before end of LS1
People/groups currently involved  
Past studies from Silvia Borghi, Maurizio Martinelli
New effort required? Yes.
Other comments None

VELO to T matching

Task name VELO to T matching
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Investigate the biases in the matching of Velo-TT to T matching
Estimated total effort required (FTE) 0.2 FTE for several months
Deadline before 2014 reprocessing
People/groups currently involved  
New effort required? Yes.
Other comments Important task for improving mass resolution. Ideal for people involved in the VELO and/or TT.

Stability of IT/OT alignment

Task name Stability of IT/OT alignment
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Stability of IT/OT alignment (short time scales (incl. Rasnik) and long time scales)
Estimated total effort required (FTE) 0.2 FTE for several months
Deadline before end of LS1
People/groups currently involved  
New effort required? Yes.
Other comments This task is interconnected with IT-OT responsibilities.

A Kink Finder

Task name Develop a kink finder with the actual detector
Task description Develop and implement a method that finds kink in trajectories to veto decay in flight
Deadline Nice to have, no real deadline
Past studies from Francesco Dettori
People/groups currently involved Nobody
New effort required Yes. Francesco is happy to help, but does not have time himself
Status A TupleTool was written that provides this information. Some more development could lead to using this information in a ProbNN variable
Talks 4/4/2013
Other comments Two techniques exploited. Problem with misid in data events.

Taken

The following tasks have been taken. Contribution is always welcome, but it's better to focus on the ones still free.

Reduce ghosts in forward tracking (taken)

Task name Reduce ghosts in forward tracking
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description For the high occupancy events the forward tracking is producing too many ghosts. This can be reduced (e.g. by tightening the windows).
Estimated total effort required (FTE) 0.5 FTE for 4 months.
Deadline before start of 2015 data taking.
People/groups currently involved Marian Stahl, Sascha Stahl
Past studies from Sascha Stahl, Stephanie Hansmann-Menzemer
New effort required? No
Other comments  

Tuning and retuning of ghost probability (taken)

Task name Tuning and retuning of ghost probability
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Only the long tracks are retuned now. Also this thing needs to be retuned regularly.
Estimated total effort required (FTE) 0.5 FTE for 2 months
Deadline before start of 2015 data taking
People/groups currently involved Paul Seyfert
Past studies from Johannes Albrecht, Paul Seyfert.
New effort required? No
Other comments Goal is to put in the HLT when the faster version is performing enough

Investigate tracking asymmetries (taken)

Task name Investigate tracking asymmetries
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Tracking asymmetries that do not cancel between magnet up and down are observed in the detector both at low and high momentum. This affects reconstruction of massive objects (i.e. W+) or slow particles in Charm and B decays.
Estimated total effort required (FTE) 1.0 FTE for 1 year.
Deadline before 2014 reprocessing.
People/groups currently involved Pietro Marino, Laurent Dufour
Past studies from Patrick Koppenburg.
New effort required? Depends on the outcome of the current studies
Other comments Large topic where many inputs from physics working groups are very welcome.

Tracking efficiency for downstream tracks (taken)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody that uses long-lived particles
Task name Tracking efficiency for downstream tracks
Task description Develop methods to measure the downstream tracking efficiency.
Estimated total effort required (FTE) 1.0 FTE for 6 months and then 0.2 FTE for maintenance and updates
Deadline Urgent for 2012 data
People/groups currently involved Nobody ?
Past studies from Eluned Smith, Patrick Owen, Bogdan Popovici
New effort required? Probably
Other comments Studies have been performed, but many points still not understood.

Tune energy loss and multiple scattering in MC (taken)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task name Tune energy loss and multiple scattering in MC
Task description Energy loss and multiple scattering not well modeled in MC. Requires tuning when reconstruction MC, or fix problem in Geant.
Deadline before start of 2015 data taking
People/groups currently involved Miriam Hess, Christian Voss.
Past studies from Jeroen van Tilburg, Maurizio Martinelli
New effort required? No
Other comments Studies have been performed, but certain things still need to be understood.
Talks 7/2/2013 13/6/2013 5/12/2013 3/4/2014

Reorganization of Alignment DB Monitoring Tools (taken)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task name Reorganization of Alignment DB Monitoring Tools
Task description Alignment has many monitoring tools developed in the past, but they are not well organized. This task would make easier to spot problems and is crucial if we want to move Alignment automation.
Estimated total effort required (FTE) 0.2 FTE for 3 months
Deadline before end of LS1
People/groups currently involved Jason Emory Andrews, Pieter David
Past studies from Maurizio Martinelli
New effort required? No.
Other comments None

Stability of the Mass position and resolution (taken)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task name Stability of the mass position and resolution
Task description Study of the stability of the mass position and their resolution versus time to monitor the quality and stability of the alignment.
Estimated total effort required (FTE) 0.5 FTE for 4 months, then 0.10 FTE for continuous check
Deadline Before end of LS1
People/groups currently involved Jack Timpson Wimberley
Past studies from Maurizio Martinelli
New effort required? No.
Other comments This is related to the momentum scale calibration, but the focus here is on obtaining a more stable alignment and understanding the alignment, rather than calibrating the detector a posteriori.

Movements when changing field (up/down/off) (taken)

Task name Movements when changing field (up/down/off)
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Investigate the movements of T stations and consequently variation of the alignment when changing field (up/down/off)
Estimated total effort required (FTE) 0.3 FTE for 12 months
Deadline before 2014 reprocessing
People/groups currently involved Varvara Batozskaya, Konrad Klimaszewski
New effort required? No.
Other comments Important task for the understanding of the alignment. If solved the mass resolution will improve significantly.

z-scaling problem (taken)

Task name z scaling problem
Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task description Investigate the z-scaling observed in TT and IT comparing the position obtained running the alignment and the survey.
Estimated total effort required (FTE) 0.2 FTE for several months
Deadline before 2014 reprocessing
People/groups currently involved Zurich
New effort required? No.
Other comments  

Completed

The following tasks have been already completed. Further effort is still needed for creating a package to automatize as much as possible the task and document it.

Calibration of momentum scale (completed)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) BandQ and everybody else
Task name Calibration of momentum scale
Task description Calibrate momentum scale using several resonances and implement DaVinci tools to apply calibration (including database). Also the error on the momentum could be calibrated. Further, a calibration as a function of the momentum is needed to disentangle energy loss and multiple scattering. Study the mass bias as function of the momentum (or other relevant variables like track slopes), both in data and in MC.
Estimated total effort required (FTE) 0.8 FTE for 4 months and after that 0.2 months for maintenance.
Deadline for 2012 physics analysis
People/groups currently involved Matt Needham, Jibo He, Christian Voss.
New effort required? Yes. This is a good task for a student working on mass measurements (with proper supervision)
Other comments High priority

Tracking efficiency for long tracks (completed)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task name Tracking efficiency for long tracks
Task description Keep tracking efficiency lines up-to-date. Determine the efficiency after the stripping.
Estimated total effort required (FTE) 0.2 FTE for 12 months; 0.5 FTE for 2015
Deadline Urgent for 2012 data, then for the restart of 2015 data taking
People/groups currently involved Michel de Cian, Paul Seyfert, Andreas Jaeger
New effort required? Yes, all these people moved to physics analyses. Maybe some manpower from Heidelberg can be allocated (uncertain for now).
Other comments High priority.

Tracker Alignment (completed)

Lead (tools, or other) group Tracking and alignment
Other relevant groups (if any) Everybody
Task name Tracker alignment
Task description Improve the tracker (TT,IT,OT) alignment for the next reprocessing of data
Estimated total effort required (FTE) 0.2 FTE for long term
Deadline Before 2011 data reprocessing.
People/groups currently involved Maurizio Martinelli
New effort required? Yes.
Other comments  

Bug in TransportSvc (completed)

Description Studies on the TrackExtrapolator show that Geant4 sees different detector volumes than the extrapolator.
People/groups currently involved Wouter Hulsbergen (Nikhef), Vanya Belyaev (ITEP), Miriam Hess (Rostock)
Status Problem understood, but not really fixable. Call it closed for now.
Talks 20/12/2012
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Topic revision: r30 - 2015-02-20 - MichelDeCian
 
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