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Beam Correction Strategies in IP Region: Results from Week 1, June 2013

This report outlines the beam correction efforts concentrated on the Interaction Point (IP) region during Week 1 of June 2013. Key strategies included upstream feedback, downstream feedforward, and direct IP feedback. Multiple runs were executed across various QD0FF and gain settings, yielding convincing results for all feedback methods. Upstream feedback demonstrated high bunch-to-bunch correlations, while downstream feedforward provided more stable gain calculations. Improvements in jitter were observed in the IP feedback, warranting further exploration of these correction techniques.

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Beam Correction Strategies in IP Region: Results from Week 1, June 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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