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MiniBooNE Resistive Wall Monitor Analysis

MiniBooNE Resistive Wall Monitor Analysis. Entire spill digitized at 2.5GHz for every $1D event. All data available on tape Sparse sample of data available on disk back to about the beginning of 2003. I’ve looked at a sampling of events as a function of time

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MiniBooNE Resistive Wall Monitor Analysis

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  1. MiniBooNE Resistive Wall Monitor Analysis • Entire spill digitized at 2.5GHz for every $1D event. • All data available on tape • Sparse sample of data available on disk back to about the beginning of 2003. • I’ve looked at a sampling of events as a function of time • Time plotted in days since first MiniBooNE beam (8/24/02) • Restrict data to 3.5E12<E:TOR875<4.5E12

  2. Batch Intensity vs Time 3.5<TOR875<4.5

  3. Early Data (early 2003)

  4. Compare Data Before and after last shutdown Just Before Shutdown Most Recent

  5. ~30 overlayed events (early 2003)

  6. ~30 overlayed events before and after shutdown Before shutdown Recent

  7. FWQM Reasonable figure of merit

  8. Frequency Spectrum, Early 2003

  9. Frequency Spectrum, before and after shutdown Less coupled-bunch in new data

  10. Conclusions • Something has changed since the shutdown • Bunch structure generally “messier” • Not sure why • Should monitor this more closely in the future.

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