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IC59 Cascade Filter Comparison between the recos for (HLC+SLC) and (HLC only) pulses Part I

IC59 Cascade Filter Comparison between the recos for (HLC+SLC) and (HLC only) pulses Part I. Mariola Lesiak-Bzdak LBNL. Cascade Phone Call, Nov. 8, 2010. Hard Local Coincidence.

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IC59 Cascade Filter Comparison between the recos for (HLC+SLC) and (HLC only) pulses Part I

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  1. IC59 Cascade FilterComparison between the recos for (HLC+SLC) and (HLC only) pulsesPart I Mariola Lesiak-Bzdak LBNL Cascade Phone Call, Nov. 8, 2010

  2. Hard Local Coincidence • A DOM will trigger if the PMT signal exceeds 0.25 PE. Readout hit only if a neighboring DOM on the same string is also hit within ±1μs – Hard Local • LC span 1 • LC span 2 Triggered DOM

  3. What is SLC? • SLC stands for Soft Local Coincidence readout mechanism. It means that the PMT waveform is digitized and read out whenever the DOM's PMT signal exceeds the threshold, even without coincidence with neighboring DOMs (thus, it is actually no coincidence at all). Thus, each hit without the local coincidence condition met will be SLC hit. • Most SLC hits recorded in an event are due to dark noise – cleaning of SLC hits needed – see: http://wiki.icecube.wisc.edu/index.php/SLC_hit_cleaning

  4. Comparison of the same event seen with only HLC (left) and both HLC and SLC (right) No cleaning applied! HLC readouts only HLC + SLC readouts Cleaning needed!

  5. Seeded RT-Cleaning principle • A hit is only kept if it has another hit: • within a designated radius R AND • within a time distance T More: http://wiki.icecube.wisc.edu/index.php/SLC_hit_cleaning

  6. SLC hit cleaning implementation in the code at Level2 for IC59 At Level2 scripts there is only one type of SLC hit cleaning implemented: [m] [ns] see: http://code.icecube.wisc.edu/svn/meta-projects/std-processing/trunk/scripts/IC59/

  7. HLC and SLC hits of the same IC59 event HLC readouts only HLC + SLC readouts SLC readouts only

  8. HLC+SLC recos check L3+ scripts: recos using HLC pulses only • Add SLC and HLC pulses: • OfflinePulseSeriesReco+OfflineSLCPulseSeriesReco • Time Window Cleaning applied to the pulses sum • Do L2 muon recos (SPEFit8 CascadeLlhVertexReco, AtmCscdEnergyReco) for TWC(HLC+SLC) Pulses and repeat L3+ recos - no cuts applied! Output i3 file has the following pulses in the frame: OfflinePulseSeriesReco, TWOfflinePulseSeriesReco, OfflineSLCPulseSeriesReco

  9. Comparison between the reconstruction for HLC pulses only and (HLC+SLC)

  10. Reminder: IC59 Level3+ cuts ------------------------------------------------------- • Energy reconstructed by AtmCascadeEnergyReco • Energy > 10 TeV OR • Zenith angle reconstructed by muon fit SPEFit8 • Zenith > 80 deg AND • Reduced likelihood rlogl of CascadeVertexFit • Rlogl < 10 ----------------------------------------------------------------------- AND • FillRatioFromMean(radius=mean*1.1) > 0.5

  11. AtmCscdEnergyReco_Energy

  12. CascadeLlhVertexFit_rlogl

  13. SPEFit8_Zenith

  14. FillRatioFromMean

  15. Comparison of shapes of distributions for DATA and rescaled E^-2 Signal

  16. Conclusions • Further analysis required: • Check efficiencies with new variables • Check reconstructions as a function of NCh, energy • Add L1 fits: i.e. Tensor of Inertia

  17. Extra SLIDES

  18. SPEFit32_Zenith

  19. CredoFit_rlogl

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