Mattione Update 08212013

From GlueXWiki
Revision as of 10:55, 21 August 2013 by Pmatt (Talk | contribs) (Accuracy)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Summary

  • Wrote new CDC Track Candidate code to try to do a better job of reconstructing low-momentum track spirals.
  • Currently debugging/testing, extremely preliminary results are below.

Track Candidate Reconstruction Samples

  • All events have one π+ thrown at p = 150 MeV/c, θ = 90 degrees, φ = random.
    • Note: When tracks are drawn, energy loss is not taken into account.
Event # Truth Hits Reconstructed Hits Current (08/20/13) Code Track Candidates Spiral Code Track Candidates # Candidates: Current / Spiral
Event 1
Mattione Update 08202013 SlowPiPlus Event1 TruthHits.png
Mattione Update 08202013 SlowPiPlus Event1 ReconHits.png
Mattione Update 08202013 SlowPiPlus Event1 Current.png
Mattione Update 08202013 SlowPiPlus Event1 Spiral.png
4 / 2 (extra in spiral is NaN)
Event 2
Mattione Update 08202013 SlowPiPlus Event2 TruthHits.png
Mattione Update 08202013 SlowPiPlus Event2 ReconHits.png
Mattione Update 08202013 SlowPiPlus Event2 Current.png
Mattione Update 08202013 SlowPiPlus Event2 Spiral.png
4 / 1
Event 3
Mattione Update 08202013 SlowPiPlus Event3 TruthHits.png
Mattione Update 08202013 SlowPiPlus Event3 ReconHits.png
Mattione Update 08202013 SlowPiPlus Event3 Current.png
Mattione Update 08202013 SlowPiPlus Event3 Spiral.png
8 / 1
Event 17
Mattione Update 08202013 SlowPiPlus Event17 TruthHits.png
Mattione Update 08202013 SlowPiPlus Event17 ReconHits.png
Mattione Update 08202013 SlowPiPlus Event17 Current.png
Mattione Update 08202013 SlowPiPlus Event17 Spiral.png
9 / 1


Performance

  • 1000 events, all with one π+ thrown at p = 150 MeV/c, θ = 90 degrees, φ = random.

Multiplicity

  • # Track Candidates
Current (08/20/13) Code
Spiral Code
  • # Time-Based Tracks (with PID = π+)
Current (08/20/13) Code
Spiral Code
  • Average Event Reconstruction Rate:
    • Current (08/20/13) Code: 7.5Hz
    • Spiral Code: 17.5Hz

Accuracy

  • Track Candidates: Δp/p
Current (08/20/13) Code
Spiral Code (large spike at p = 0 and NaN...)
  • Track Candidates: Δθ
Current (08/20/13) Code
Spiral Code
  • Track Candidates: Δφ
    • New spiral code almost always chooses the correct spiral arm!! (and thus gets the correct charge)
Current (08/20/13) Code
Spiral Code
  • Track Candidates: ΔVertex-Z
Current (08/20/13) Code
Spiral Code
  •  % of events with at least one track that is "roughly close" to the thrown parameters:
    • "Roughly Close": p within 20%, θ within 15 degrees, φ within 30 degrees, Vertex-Z within 10cm
Stage Current (08/20/13) Code Spiral Code
Track Candidates 28.9% 33.0%
Time-Based Tracks 5.7% 5.8%