1 / 14

Feedback and Feedforward

Feedback and Feedforward. Daniel Schulte. Strategy to Evidence Beam Stability. Need to have the ingredients, i.e. the hardware models Specifications are to guide the work not to judge the final result in the CDR. Ground Motion Mitigation.

freddies
Download Presentation

Feedback and Feedforward

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Feedback and Feedforward Daniel Schulte

  2. Strategy to Evidence Beam Stability Need to have the ingredients, i.e. the hardware models Specifications are to guide the work not to judge the final result in the CDR

  3. Ground Motion Mitigation Will focus on feedback/feedforward but integration of all effects is essential

  4. Ground Motion Models Stabilisation needs and results are ground motion dependent We give an attenuation and a final noise level We have to chose some models, Annecy is not a bad one More input is needed on correlation

  5. Example Study Stabilisation of final quadrupoles/beam at the collision point is most important

  6. IP Feedback/Feedforward Systems Full integration is essential

  7. Example Integration of Feedbacks All ingredients are makeshifts, need to replace them with better models

  8. Example: Choice of Feedforward Sensor Sensor choice is critical, e.g. Endevco 86 couldbebetterthangeophone

  9. Example: Impact on Transfer Function Based on cantilever design by Hubert and Alain Critical to derive full model including quadrupole deformations Significant impact on conclusions

  10. Impact of Intra-Pulse Feedback Realistic bunches and trains should be included

  11. Conclusion • Ground motion model • have some models that could be used • more explicit CLIC model would be useful, some work with stabilisation group needed • Model of the transfer of motion from the ground to the final quadrupoles including quadrupole deformations and mechanical feedback • some bits exist but need a full model • need to integrate mechanical feedback into overall feedback/feedforward • Sensor to detect residual motion of quadrupoles • Need to explore which one to use (e.g. Endeveco 86) • Pulse-to-pulse beam-based feedfack/feedforward • basic concept exists • controller is being developed (for IP with Annecy), design depends on motion spectra and sensor • Orbit feedback layout under dvelopment • Intra-pulse feedback • design exists • some studies exist • performance in more realistic conditions needs some more study • Mainly depend on results from stabilisation working group • Beam side should be ready in time

  12. Spare Slides

  13. Support Transfer Function Transfer function of the support is vital

  14. Impact of Sensitivity The sensitivity function determined the feed-forward performance

More Related