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November 25, 2009 Eric Jones

Study of New Muon Trigger Electronics Performance and Muon Arm Background Condition of Polarized Proton-Proton Collisions at 500 GeV. November 25, 2009 Eric Jones. Evaluating the Performance. Each octant studied behaved similarly, so total station counts were used.

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November 25, 2009 Eric Jones

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  1. Study of New Muon Trigger Electronics Performance and Muon Arm Background Condition of Polarized Proton-Proton Collisions at 500 GeV November 25, 2009 Eric Jones

  2. Evaluating the Performance Each octant studied behaved similarly, so total station counts were used. Best tool available was ratio of signal to noise, given by

  3. BBC Rate Dependence

  4. Threshold Dependence

  5. Logic Dependence

  6. BBC Rate Dependence of MuID Gap-By-Gap Current

  7. MuID Current Comparison for Run 9 200 GeV vs. 500 GeV and Run 8 vs. Run 9 Run 8 200 GeV (β*=1.0) and Run 9 200 GeV (β*=0.7) currents scale Run 9 200 GeV and 500 GeV MuID currents do not scale

  8. MuID Current Ratios MuID current gap ratio remained constant as a function of BBC rate except for Gap1/Gap3 ratio in South Arm

  9. Non-linear Response of MuID Current Against Rate?

  10. MuID Current Response at Run 11 and Run 12 Luminosity

  11. Summary S/N Ratio studies confirm that: -Combined MuIDLL1&BBCLL1 trigger gives best performance -Performance decreases as BBC rate increases -Higher threshold voltages give best signal to noise ratio -AND2 logic suffers less from background conditions than OR logic and demonstrated more stable signal to noise ratio MuID current gap-by-gap ratio studies demonstrate the effects of interactions occurring from upstream and downstream the beamlines, showing Gap 1 and Gap 5 were most susceptible while Gap 3 was expected to be most shielded. Gap 1 in North Arm demonstrated that linear response can not be expected for higher luminosity runs at 500 GeV MuID current extrapolations show that more knowledge of MuID behavior at high rates will be necessary to make predictions of the rejection factor obtainable from the detector

  12. Acknowledgements

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