Pressure and e cloud measurements sps md run 19 20 10 2010 and 10 11 2010
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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

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


Configuration liner and gauge
Configuration Liner and Gauge

Holger Neupert TE/VSC


Configuration mbbs and gauges
Configuration MBBs and Gauges

VGHB_51540 betweencoated and uncoated MBB alwaysreadshighest pressure, probably due to contaminated MBB 51550

Holger Neupert TE/VSC


Pressure data overview
Pressure Data Overview

Holger Neupert TE/VSC


Pressure data details
Pressure Data Details

1 SuperCycle

Pmax/

SuperCycle

Different Gauges

Holger Neupert TE/VSC










Discussion
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