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Analysis of Multiplicity and Residuals for Targets in JLab Hall C: 52Cr and Other Nuclei

This meeting presentation by T. Gogami, held on December 24, 2010, at JLab Hall C, discusses the current status of experimental setups, focusing on the multiplicity and residuals associated with various targets including 52Cr, 10B, 9Be, and more. The study highlights unusual distribution patterns, particularly for the 52Cr target with an H2O configuration, and examines the correlation between multiplicity and event rates. Additionally, residual analysis reveals dependencies that impact tracking and event cleanup procedures. Future tasks include improved tracking simulations and enhancements in drift time calculations.

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Analysis of Multiplicity and Residuals for Targets in JLab Hall C: 52Cr and Other Nuclei

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  1. E05-115 experimental setup in JLab Hall C (2009) HES HKS meeting 24Dec 2010 T.Gogami

  2. Contents • Current status • multiplicity • Residual • Residual • Weird distribution especially for 52Cr , H2O target Curry buffet in AOSIS (16Dec2010)

  3. Multiplicity for each target 10B 9Be 52Cr 12C Cannot extract tracks from higher multiplicity event. 7Li H2O CH2 Pattern recognition Ntuple

  4. Multiplicity for each layer

  5. Residual for each target 52Cr ,77124 σ≈372 [μm] 12C ,76077 σ≈218 [μm] 10B ,76184 σ≈161 [μm] 9Be ,76607 σ≈214 [μm] 7Li ,76220 σ≈181 [μm] H2O ,75972 σ≈337 [μm] CH2 ,76314 σ≈155 [μm]

  6. Rate dependence • Multiplicity : linear dependence with rate • Residual : quadratic dependence with rate Kawama-san’s study

  7. Residual vs. track chi2 for 52Cr

  8. Residual of 52Cr target 1 12

  9. Typical event with event display

  10. Residual vs. Drift distance cleanup.f reject bad events

  11. Summary and to do • Summary • Multiplicity • Linear dependence with rate in KDC • Residual • Quadratic dependence with rate in KDC • Weird distribution especially for 52Cr , H2O target • To do • Tracking • 4 by 4 • Doisimulation • Residual • Track fit • Left right • Drift time calculation • E01-011 • 出張手続き • 飛行機 • 宿 • ViSA

  12. End 焼きチーズカルボナーラ @ハミングバード in LaLa garden 23 Dec 2010

  13. x , x’ wires

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