1 / 29

LHC e - cloud simulations

LHC e - cloud simulations. C.Octavio Dom ínguez , Giovanni R umolo, Frank Zimmermann. 17 th January2011 - e - cloud simulations. C ontents. LHC IR3: State of the art 2) LHC arc dipoles: Emittance scan (onset, build up & energy distribution)

martin-trevino
Download Presentation

LHC e - cloud simulations

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. LHC e- cloud simulations C.Octavio Domínguez, Giovanni Rumolo, Frank Zimmermann 17th January2011 - e-cloudsimulations

  2. Contents • LHC IR3: • State of the art • 2) LHC arc dipoles: • Emittance scan (onset, build up & energy distribution) • Intensity scan (build up & x-flux distribution) 2 17th January2011 - e-cloudsimulations

  3. Contents • LHC IR3: • State of the art • 2) LHC arc dipoles: • Emittance scan (onset, build up & energy distribution) • Intensity scan (build up & x-flux distribution) 3 17th January2011 - e-cloudsimulations

  4. LHC IR3 First idea  Try to reproduce this plot, BUT  4 parameters: P, SEY, emaxand R 4 17th January2011 - e-cloudsimulations

  5. LHC IR3 – 8.85 ms ~ Factor 6 Memory effect ~ Factor 3 5 17th January2011 - e-cloudsimulations

  6. LHC IR3 – 8.85 ms ~ Factor 1.1 No memory effect ?? ~ Factor 1.1 6 17th January2011 - e-cloudsimulations

  7. LHC IR3 7 17th January2011 - e-cloudsimulations

  8. LHC IR3 – Energy distribution 8 17th January2011 - e-cloudsimulations

  9. LHC IR3 – Energy distribution 9 17th January2011 - e-cloudsimulations

  10. LHC IR3 – Work to do • Look at 28.85 and 38.85 ms • Look at the flux (maybe related to the pressure rise) • Make the study for individual batches of 12, 24 and 36 bunches • … 10 17th January2011 - e-cloudsimulations

  11. Contents • LHC IR3: • State of the art • 2) LHC arc dipoles: • Emittance scan (onset, build up & energy distribution) • Intensity scan (build up & x-flux distribution) 11 17th January2011 - e-cloudsimulations

  12. LHC arc dipoles - e scan Geometry: Parameters: Nb = 1.1 · 1011 ppb; B = 0.535 T (dipolar field) ; sz = 0.118 m emax = 230 eV ; R = 0.7; P=1nTorr Filling scheme: 1 batch (36 bunches) • 18 mm • 22 mm 12 17th January2011 - e-cloudsimulations

  13. LHC arc dipoles - e scan 13 17th January2011 - e-cloudsimulations

  14. LHC arc dipoles - e scan Build up 14 17th January2011 - e-cloudsimulations

  15. LHC arc dipoles - e scan Build up 15 17th January2011 - e-cloudsimulations

  16. LHC arc dipoles - e scan Build up 16 17th January2011 - e-cloudsimulations

  17. LHC arc dipoles - e scan Energy distribution 17 17th January2011 - e-cloudsimulations

  18. LHC arc dipoles - e scan Energy distribution 18 17th January2011 - e-cloudsimulations

  19. LHC arc dipoles - e scan Energy distribution 19 17th January2011 - e-cloudsimulations

  20. LHC arc dipoles - e scan Energy distribution 20 17th January2011 - e-cloudsimulations

  21. Contents • LHC IR3: • State of the art • 2) LHC arc dipoles: • Emittance scan (onset, build up & energy distribution) • Intensity scan (build up & x-flux distribution) 21 17th January2011 - e-cloudsimulations

  22. LHC arc dipoles - Nb scan Geometry: Parameters: eN= 2.3 mm; B = 0.535 T (dipolar field) ; sz = 0.118 m emax = 230 eV ; R = 0.7; P=1nTorr SEY=2.5 (above multipacting onset) Filling scheme: 1 batch (36 bunches) • 18 mm • 22 mm 22 17th January2011 - e-cloudsimulations

  23. LHC arc dipoles - Nb scan Build up 23 17th January2011 - e-cloudsimulations

  24. LHC arc dipoles - Nb scan Build up 24 17th January2011 - e-cloudsimulations

  25. LHC arc dipoles - Nb scan x flux distribution 25 17th January2011 - e-cloudsimulations

  26. LHC arc dipoles - Nb scan x flux distribution 26 17th January2011 - e-cloudsimulations

  27. LHC arc dipoles - Nb scan x flux distribution 27 17th January2011 - e-cloudsimulations

  28. 28 17th January2011 - e-cloudsimulations

  29. 29 17th January2011 - e-cloudsimulations

More Related