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Event Cut Strategy & Tracking Analysis Meeting Summary

Discussion on data analysis, event cut strategy, tracking methods, and bug fixes for HES and HKS experiments. Reviewing multiplicity, hit selection, resolution, and efficiency with GEANT simulation and real data. Recognizing bug in HKS tracking. Planning quantitative results for tracking per target.

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Event Cut Strategy & Tracking Analysis Meeting Summary

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  1. HES HKS meeting 7/Feb/2011 T.Gogami 今日の朝ごはん @ Quark café

  2. Contents • New event cut strategy (idea) • Event display for HES side • E01-011 data analysis (トラぺにはないですが) • データサマリはありますか？

  3. CurrentPre-track cut with TOF counters • TDC cut • Pattern recognition • Space points • Combination of space points • Pre-track • Check corresponding TOF counters with the pre-track • Tracking

  4. CurrentPre-track cut with TOF counters • TDC cut • e- e+ backgrounds • ADC and TDC of Cherenkovs and TOF walls • Hit selection with TOFs • Pattern recognition • Space points • Combination of space points • Pre-track • Check corresponding TOF counters with the pre-track • Tracking

  5. Multiplicity of TOF1X and KDC1-1x Multiplicity of KTOF1X is mostly 1~2 CH2 , 76314 52Cr , 77124

  6. Event cut strategy KTOF2X KTOF1X KDC2 KDC1 • This picture shows only x-layer • x’-layer can be also used Can be cut

  7. Event cut strategy KTOF2X KTOF1X KDC2 KDC1 • 5~6% of the KDC sensitive region (x-z plane) 1220.0 Width = 95.0 Width = 75.0 59.4 72.8 1499.6 1664.5 2671.6

  8. Event cut strategy Can be cut before pattern recognition

  9. HES event display

  10. HES tracking start • EDC1 • Trans • Pattern recognition • Pre link • Cleanup • Left right • Track fit • EDC2 • Trans • Pattern recognition • Left right • Track fit • e_physics Hit information in EDC1 Hit information in EDC2 • Tracking information • x,x’,y,y’ at Reference plane • EHODO data

  11. HES event display HESdisp HESdetectors EDC1 data EDC EDC2 • EMACS • makedata.sh dat file ENGINE

  12. Multiplicity in chambers Multi-hit TDC HES layer 10 6 52Cr target CH2 target mean ~ 1 hit mean ~ 1 hit HKS 6 6 layer 52Cr target CH2 target mean ~ 6 hit mean ~ 2 hit 22nd Indian-summer school (SNP2010)

  13. CH2

  14. Event display for HES (CH2) Track direction Track direction EHODO2 EHODO1 EDC2 EDC1 BLACK : Hit wires BULE : Selected wires

  15. Event display for HES (CH2) ENGINE -> dat -> dat’ -> display Track direction Track direction EHODO2 EHODO1 EDC2 EDC1 BLACK : Hit wires BULE : Selected wires There’s bug

  16. Event display for HES (CH2) Track direction Track direction EHODO2 EHODO1 EDC2 EDC1 BLACK : Hit wires BULE : Selected wires

  17. 52Cr

  18. Event display for HES (52Cr) Track direction Track direction EHODO2 EHODO1 EDC2 EDC1 BLACK : Hit wires BULE : Selected wires

  19. Event display for HES (52Cr) Track direction Track direction EHODO2 EHODO1 EDC2 EDC1 BLACK : Hit wires BULE : Selected wires

  20. Event display for HES (52Cr) Track direction Track direction EHODO2 EHODO1 EDC2 EDC1 BLACK : Hit wires BULE : Selected wires

  21. Get Event display • Copy /home/gogami/ makeEdisp.sh • Execute $ ./makeEdisp.sh • Sample data • 76314 : CH2 • 77124 : 52Cr

  22. bug RunID Event ID Total hit Miscount of hit num. per layer EDC1 EDC1 EDC1 Total hit EDC2 9 ? 11 ? EDC2 EDC2 Haven’t fixed yet

  23. Summary and To do • Summary • New event cut strategy for HKS (idea) • With TOFs before pattern recognition • Event display for HES • Cleaner than HKS (multiplicity is less than HKS) • Found a bug in HKS tracking • Miscount of hit num. per layer in EDC2 • To do • Quantitative results of tracking for each target • Efficiency • With GEANT , With real data • Resolution • Rate , multiplicity • Cut background event which comes from NMR port • Before pattern recognition • New event cut routine • ADC and TDC correlation of Cherenkovs or TOFs • E01-011

  24. END Residence facility CEBAF center タバコを吸う場所 元バスケットコート 6Feb2011 ここに道が通りました。 他にも色々と変わりました。

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