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Roundup of FONT Shifts June Run Week 1 2013

Roundup of FONT Shifts June Run Week 1 2013. Mikey Davis. 7 June 2013. 1 /12. Introduction. Today we concentrated on beam correction Achieved correction in the IP region using: Upstream feedback Upstream -> downstream feedforward IP feedback Convincing sets of results for all three

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Roundup of FONT Shifts June Run Week 1 2013

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  1. Roundup of FONT ShiftsJune Run Week 1 2013 Mikey Davis 7 June 2013 1/12

  2. Introduction • Today we concentrated on beam correction • Achieved correction in the IP region using: • Upstream feedback • Upstream -> downstream feedforward • IP feedback • Convincing sets of results for all three • Multiple runs over multiple QD0FF and gain settings • Got some very good upstream feedback results Mikey Davis 7 June 2013 2/12

  3. Upstream Feedback • Many runs taken • Different gains • Different QD0FF strengths (jitters) • Repeated correction in both IPA and IPB • Very good agreement upstream with model\ • Bunch to bunch correlations of between • 80 – 85% for P2 • 90 – 95% for P3 • Ext kicker timing scan didn’t improve this Mikey Davis 7 June 2013 3/12

  4. Upstream Feedback Mikey Davis 7 June 2013 4/12

  5. Upstream Feedback Mikey Davis 7 June 2013 5/12

  6. Upstream -> Downstream Feed Forward • Got more stable gain calculations than last time • I used charge norm position which worked better • Upstream fb to downstream second bunch • Not much higher bunch to bunch correlations • Around 70 % • Need to look more at this as not sure it’s always this Mikey Davis 7 June 2013 6/12

  7. Upstream Downstream Feed Forward Mikey Davis 7 June 2013 7/12

  8. IP Feedback • Managed to get many runs with an improvement on the jitter • Scanned QD0FF strength to change the amount of jitter • Maybe see an improvement at IPA • Not convinced • Bunch to bunch correlations of about 95% when not limited by resolution Mikey Davis 7 June 2013 8/12

  9. IP Feedback Mikey Davis 7 June 2013 9/12

  10. IP Feedback Mikey Davis 7 June 2013 10/12

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