1. Microwave Direct Phase Shift Measurements N. Eddy, J. Crisp

2. Observed ‘AC-coupling’

3. 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

10. 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