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ECLOUD Calculations of Coherent Tune Shifts for the April 2007 and January 2009 Measurements - Preparation for PAC2009 FR5RF Paper and Poster - “Effects.

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Presentation on theme: "ECLOUD Calculations of Coherent Tune Shifts for the April 2007 and January 2009 Measurements - Preparation for PAC2009 FR5RF Paper and Poster - “Effects."— Presentation transcript:

1 ECLOUD Calculations of Coherent Tune Shifts for the April 2007 and January 2009 Measurements - Preparation for PAC2009 FR5RF Paper and Poster - “Effects of Electron Cloud Formation on Beam Dynamics at CesrTA” Jim Crittenden Cornell Laboratory for Accelerator-Based Sciences and Education Electron Cloud Simulations Meeting Wilson Lab 22 April 2009 Includes post-meeting improvements Plot added to slide 4

2 2 22 April 2009 ECLOUD Tune Shift Calculations -- April 2007 Measurements -- ECLOUD Coherent Tune Shifts and PAC2009/ J.A.Crittenden Systematic improvement since the March 25 results: Effects of charge in witness bunches now included.

3 3 22 April 2009 ECLOUD Tune Shift Calculations -- January 2009 Measurements -- ECLOUD Coherent Tune Shifts and PAC2009/ J.A.Crittenden ECLOUD instability problems unlikely to be resolved in time for PAC2009.

4 4 22 April 2009 ECLOUD Tune Shift Calculations -- Example of SEY Curve Population -- ECLOUD Coherent Tune Shifts and PAC2009/ J.A.Crittenden Consider a plot for FR5RF44 showing SEY population. Descriptive text for introduction, tune shift measurement procedure, POSINST results and future plans will saturate the three pages. Additional space available on the poster. Yield curve for true secondaries for peak yield 2.0 and peak energy 310 eV Simulated SEY yield population including elastics for the case of a drift volume for the April 2007 data

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