1 / 9

Analysis of Microphonics in SSR1 for Project-X

Analysis of Microphonics in SSR1 for Project-X. M. Hassan, D . Passarelli , I. Gonin , S . Barbanotti , L . Ristori , and S . Yakovlev 9/27/2011 PXIE Meeting. SSR1 Geometry Generations. SSR1-G1 Single Rib on Top. SSR1-G2 Double Rib on Top. SSR1-G3 Two Ribs+ Side Ring.

eliza
Télécharger la présentation

Analysis of Microphonics in SSR1 for Project-X

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. Analysis of Microphonicsin SSR1 for Project-X M. Hassan, D. Passarelli, I. Gonin, S. Barbanotti, L. Ristori, and S. Yakovlev 9/27/2011 PXIE Meeting

  2. SSR1 Geometry Generations SSR1-G1 Single Rib on Top SSR1-G2 Double Rib on Top SSR1-G3 Two Ribs+ Side Ring

  3. Comsol Simulation Three Multiphysic Modules Two Simulation Studies =

  4. Stainless Steel Vessel • Electromagnetic Waves • Solid Mechanics Setup • Solving only for the RF domain • Applying the prober boundary conditions • Solving only for the Cavity Vessel • Applying the proper fixed constraints, symmetries, displacements, and boundary load PEC RF Domain PMC Niobium Shell Fixed Constraint Symmetry Boundaries Pressure Boundary Load dx=0 dy=0 Prescribed Displacement dx Free Deformation Prescribed Deformation u,v,w Prescribed Displacement u,v,w dz=0

  5. Investigation of the displacement effects on SSR1-G3 Fixed Beam Pipe Constraints Fixed all constraints • Different constraints would imply another linear relation with different line slope that passes through the fixed all constraints point • The larger the slope of the linear relation the better as it would get the zero df/dp closer from the fixed all constraints point

  6. Lessons from SSR0 • Pibe Ribs are very important to reduce df/dp • Ring between the shell and the Helium vessel would simplify the vessel design

  7. Design procedure to minimize df/dp

  8. SSR1-G3 with Helium Vessel 17.1 µm -17.2 µm z Comsol 131702 f0=325.3295MHz f1=325.3332 MHz df/dp ~4.9 Hz/torr

  9. Conclusion • Microphonics of SSR1 has been reduced to about 5Hz/Torr • A general procedure for minimizing the microphonics in spoke cavities has been proposed • What is next?

More Related