Microwave Direct Phase Shift Measurements

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Microwave Direct Phase Shift Measurements

• N. Eddy, J. Crisp

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Observed AC-coupling
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The Data

• Over 50 events taken at MI60 12.5m with Dipoles
• Each event records 150 turns of data at 500MS/s
• Record phase shift beam from RWM
• Data is processed offline
• Mixer Compensation Filter
• 100 Turn Average
• Data was taken for 3 and 4 slip stacked batches
  with from 2-10 Booster turns
• Also have a few no beam events
• Did not record a beam only (no drive) event

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Summary

• Primary source of signal distortion was found to
  be due to Mixer low frequency attenuation
• Compensated for with IIR filter
• Preliminary look at all data collected during Dec
  16 study
• No strong difference between 3 4 Batch
• Non-linear dependence on bunch intensity
• Investigate Bunch Length dependence
• Collect data in Dipole free straight section