Difference between revisions of "Mattione Update 08212013"
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== Hit Selector == | == Hit Selector == | ||
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| [[Image:Mattione_Update_08202013_NumTimeBased_Spiral_NoSelector.png|thumb|left|500px|Spiral Code, No Hit Selector]] | | [[Image:Mattione_Update_08202013_NumTimeBased_Spiral_NoSelector.png|thumb|left|500px|Spiral Code, No Hit Selector]] | ||
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=== Accuracy === | === Accuracy === | ||
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Revision as of 00:46, 21 August 2013
Contents
Track Candidate Reconstruction Sampling
- All events have one π+ thrown at p = 150 MeV/c, θ = 90 degrees, φ = random.
Event # | Truth Hits | Reconstructed Hits | Current (08/20/13) Code Track Candidates | Spiral Code Track Candidates |
---|---|---|---|---|
Event 1 |
Performance
- 1000 events, all with one π+ thrown at p = 150 MeV/c, θ = 90 degrees, φ = random.
Multiplicity
- # Track Candidates
- # Time-Based Tracks (with PID = π+)
- Average Event Reconstruction Rate:
- Current (08/20/13) Code: 7.5Hz
- Spiral Code: 17.5Hz
Accuracy
- Track Candidates: Δp/p
- Track Candidates: Δθ
- Track Candidates: Δφ
- Track Candidates: ΔVertex-Z
- % 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% |
Hit Selector
Multiplicity
- # Time-Based Tracks (with PID = π+) with Hit Selector DISABLED
- Hit Selector:
- Runs just prior wire-based & time-based tracking.
- Re-selects which hits to use for track fitting.
- In theory this improves things, because with better guesses for the track momentum and position, you should be able to better select the hits along that trajectory.
- In practice, this can pick up many extra, unwanted hits for spiraling tracks
- Recommendation: Test with the hit selector set to ONLY reject hits, NOT to acquire new ones.
- Hit Selector:
Accuracy
- % 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 | Current (08/20/13) Code, No Hit Selector | Spiral Code, No Hit Selector |
---|---|---|---|---|
Track Candidates | 28.9% | 33.0% | NA | NA |
Time-Based Tracks | 5.7% | 5.8% | 11.3% | 7.5% |