1 / 13

Power Losses due to Button and Reentrant BPMs

Power Losses due to Button and Reentrant BPMs. Igor Zagorodnov and Dirk Lipka 01.10.07 BD meeting, DESY. Button BPM. gap=1mm. Accuracy Test of CST Microwave Studio -> OK. Gaussian bunch with sigma=2mm. Loss = 0.05 kV/nC. Kick = 0.2 kV/nC/m. BPM with Microwave Studio.

ulfah
Download Presentation

Power Losses due to Button and Reentrant BPMs

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. Power Losses due to Button and Reentrant BPMs Igor Zagorodnov and Dirk Lipka 01.10.07 BD meeting, DESY

  2. Button BPM

  3. gap=1mm Accuracy Test of CST Microwave Studio -> OK Gaussian bunch with sigma=2mm Loss = 0.05 kV/nC Kick = 0.2 kV/nC/m

  4. BPM with Microwave Studio Gaussian bunch with sigma=1mm Gaussian bunch with sigma=25mkm Loss = 0.047 kV/nC Loss = 0.3 kV/nC Kick = 0.13 kV/nC/m Kick = 0.02 kV/nC/m

  5. Rotationally symmetric model with ECHO (as an estimation from above) g=1mm a=39mm Analytical estimation (K.Bane, Sands M., SLAC-PUB-4441, 1987)

  6. Power Loss (upper level, round approx.) (“real”, scaled, see slide 4)

  7. Reentrant BPM gap=8.5 mm

  8. r [cm] z [cm] Reentrant BPM Gaussian bunch with sigma=25 mkm g=8.5 mm, a=39 mm Loss (analytical) = 2.77 kV/nC Loss (ECHO) = 2.68 kV/nC

  9. Reentrant BPM Long range wake Up to 3 m for sigma =2.5 mm Prony-Pisarenko fit P. Thoma, Berechnung der Güten einiger Resonanzen eines verlustfreien Resonators mit angekoppeltem verlustfreien Wellenleiter. (1992, Darmstadt, Diplomarbeit betreut bei Martin Dohlus)

  10. Long range wake wake Modal loss factor k [kV/C] W [kV/nC] s [cm] f [Hz] Loss for sigma = 25mkm (ECHO) = 2.68 kV/nC

  11. Button BPM vs. Reentrant BPM for sigma = 25mkm

  12. BPM vs. others for sigma = 25mkm normal conductivity superconductive

  13. Acknowledgements • to Martin Dohlus for useful discussions • to Rolf Schuhmann for “Prony-Pisarenko” Matlab script • to CST GmbH for the new wakefield solver

More Related