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New fieldmaps

125acm2_3kg_corrected_unfolded_scaled_0.7992_v2.tar.gz

txt-to-dat command: java -cp distribution/target/hps-distribution-4.1-SNAPSHOT-bin.jar org.hps.util.UnfoldFieldmap BmapCorrected3D_3k.txt 0.8

209acm2_5kg_corrected_unfolded_scaled_1.04545_v2.tar.gz

txt-to-dat command: java -cp distribution/target/hps-distribution-4.1-SNAPSHOT-bin.jar org.hps.util.UnfoldFieldmap BmapCorrected3D_5k.txt 1.0456

Some validation plots: BfieldPlots209acm2_5kg.tar

Things to check

  • Symmetries of the seven octants into which the field map is expanded
  • First derivatives along octant boundaries
  • Smoothness of point where calculation and explicit field map measurements are merged (around z=1m in above plot)
  • Make sure fields are renamed to preserve provenance.
  • Make sure new fields are copied to all public locations
  • Make sure all compact.xml files are modified and lcdd files are regenerated.
  • Check log files on new MC/recon/analysis production jobs to ensure new fields are being picked up and used.

Recon classes

Accessing full field-map

  • TrackDataDriver: By in extrapolation from Layer6 to ECal
  • TrackUtils > extrapolateTrackUsingFieldMap: By

Accessing at tracker centre

  • TrackDataDriver: By for track intercepts with sensors
  • SeedTracker: By
  • BilliorVertexer: By
  • MakeGblTracks: |B|
  • TrackUtils >
    • extrapolateTrackPositionToSensor: By
    • getHelixPlaneIntercept: By
    • extrapolateTrack: By

Recon studies affected

  • Track extrapolation to ECal / track-cluster matching
  • Top-bottom asymmetry
  • Beam slope MC

Analysis results affected

 

MC samples requiring re-generation

 

Field Map Plots

BY as a function of z along the z axis.

A few values from the old map:

z= 0           By = -0.19767       0.824   ~target
z= 90       By = -0.23610       0.984   ~L1
z= 400   By = -0.24000       1.000   ~L4
z= 900   By = -0.20907       0.871   ~L6  

 z=1339 ~ECal scoring plane

 z=1395 ~Ecal crystal front face plane

Plots from the (correct) txt files: Bfieldmap.pdf

 

 

 

 

 

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