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Pressure and e-cloud measurements SPS’ MD run 19/20.10.2010 and 10.11.2010

Pressure and e-cloud measurements SPS’ MD run 19/20.10.2010 and 10.11.2010. 2 different bunch spacings , 50ns (24 and 36 bunches/batch) and 25ns (36 and 72 bunches/batch) Pressure reading between coated MBBs, e-cloud monitors and reference gauge Data aquisition from e-cloud monitors

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Pressure and e-cloud measurements SPS’ MD run 19/20.10.2010 and 10.11.2010

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  1. Pressure and e-cloud measurements SPS’ MD run 19/20.10.2010 and 10.11.2010 2 different bunch spacings, 50ns (24 and 36 bunches/batch) and 25ns (36 and 72 bunches/batch) Pressure reading between coated MBBs, e-cloud monitors and reference gauge Data aquisition from e-cloud monitors Is there a simple correlation between e-cloud currents and pressure rise? Holger Neupert TE/VSC

  2. Configuration Liner and Gauge Holger Neupert TE/VSC

  3. Configuration MBBs and Gauges VGHB_51540 betweencoated and uncoated MBB alwaysreadshighest pressure, probably due to contaminated MBB 51550 Holger Neupert TE/VSC

  4. Pressure Data Overview Holger Neupert TE/VSC

  5. Pressure Data Details 1 SuperCycle Pmax/ SuperCycle Different Gauges Holger Neupert TE/VSC

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  14. Discussion • Are Pressure Gauges the right tool to measure e-cloudactivity? • Causes the samebeam (type) always the same e-cloud? • Thanks for your attention! Holger Neupert TE/VSC

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