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Harp Update

Harp Update. Dave Schmitz, Linda Coney, Geoff Mills Boone Collab Meeting 27/2/04. HARP Detector. What’s happening in Harp?. Calibration of detectors Unfolding crosstalk in TPC Tracking in NDC Connecting detectors together Particle ID Tof Wall – active in PID

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Harp Update

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  1. Harp Update Dave Schmitz, Linda Coney, Geoff Mills Boone Collab Meeting 27/2/04

  2. HARP Detector

  3. What’s happening in Harp? • Calibration of detectors • Unfolding crosstalk in TPC • Tracking in NDC • Connecting detectors together • Particle ID • Tof Wall – active in PID • Ckov and Cal - on the way • MC

  4. NDC 1 NDC 2 NDC 5 NDCs - Forward Analysis • psecondary > 0.5GeV/c • qsecondary< 300 mrad • Use NDC 1, 2, and 5 to reconstruct track and momentum

  5. NDCs – Forward Analysis Reconstruction Efficiency (single track) – Issei Kato • 95% efficiency for almost all angles and momentum 1.0 0.8 0.6 0.4 -200<qx<100 0.2 0 1 5 -200 0 200 -100 0 100 2 3 4 qx (mrad) qy (mrad) P (GeV/c)

  6. Beam Tof - TDC Calibration Dave Schmitz Have implemented the bin by bin calibration measurements for all ToF and TDS channels and BeamRef. All channels look similar to BeamRef shown above. Previously used average per channel.

  7. Beam ToF Pulse-Height Calibration (February 17, 2004) Timing in TDS counter very sensitive to ADC value. Used a 3rd order correction for TDS channels   0.3ns   0.25ns

  8. Beam ToF Calculations D. Schmitz (February 17, 2004) TB - TA TTDS - TA

  9. t0 Extrapolation D. Schmitz currently a linear extrapolation to target face. limited by resolution in beam tof detectors.

  10. Data Analysis Path • Run production over raw data • Produce iDST text files with raw data objects • So far 500K Be 5% target, 500K MB1l target, 30K MB 0.5l target • Reconstruct Data and MC from iDST • Build higher level objects like clusters, segments, tracks in NDC, MWPC, etc • Connect tracks in NDC to t0, TofW, CKov, vertex, beam detectors etc. g Build PID algorithm • Feed reconstructed data information for full event into Master Boone ntuple • Able to determine PID, full reconstruction, all subdetector systems, momentum and angle reconstruction

  11. MiniBoone Harp Workshop at LANL • Harp software package set up @ LANL and MB afs • Major progress in understanding reconstruction code • All detector reconstruction output separate until this week • Building Master Boone ntuple • So far contains • BCkov, TDS • Beam Tof detectors • NDC • TofW • soon: MWPC, Ckov, Cal

  12. MiniBoone Harp Workshop at LANL • Run over 150K MB 1l data events • LOOK AT THE DATA!! • BCkov : select incoming beam proton • TDS, Beam Tof – Get T0 for event at target face • NDC – tracks g particle momentum • TofW – PID g m2

  13. Primary Proton Beam Selection Beam Cerenkov A • select on beam protons • BCA & BCB< 160 counts • g 65% of beam particles

  14. Primary Proton Beam Timing T0 Dave put something in Here on the tof calculation and calibration???? Time defined by TofA TofB, and TDS

  15. Dipole Spectrometer Momentum MB 1l target Primary protons

  16. Tof PID in Dipole Spectrometer p Cerenkov threshold

  17. Threshold Cerenkov Detector • Discriminates between protons and pions at high momentum. C4F10 properties: n = 1.001415 pion threshold = 2.6 GeV/c kaon threshold = 9.3 GeV/c proton threshold = 17.6 GeV/c

  18. Conclusions… • MiniBoone HARP Workshop has been a tremendous success! • First look at combined NDC tracking and Tof Particle ID • Looking at HARP MiniBoone DATA!!!! • Beam TOF calibration code in place for T0 measurement • Next Steps: • Resolve downstream TOF calibration issues • Extend p/ separation with Cerenkov counter (>2.6GeV/c) • Target definition with beam line MWPC chambers • Completion of large scale production of MiniBooNE • Preparation for critical forward analysis workshop April 5,6,7

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