Higher order mode damping in a five-cell superconducting rf cavity with a photonic band gap coupler cell
Name
PhysRevAccelBeams.19.081301.pdf
Size
1.27 MB
Format
Adobe PDF
Checksum (MD5)
5546e86d0c29df7924a6a85b4d74a69b
Author(s)
Shchegolkov, Dmitry Yu.
Simakov, Evgenya I.
Boulware, Chase H.
Grimm, Terry L.
Rogacki, Adam R.
Arsenyev, Sergey
Temkin, Richard J
Date Issued
March 2016
Journal
Physical Review Accelerators and Beams
Publisher
American Physical Society (APS)
Citation
Arsenyev, Sergey A. et al. “Higher Order Mode Damping in a Five-Cell Superconducting Rf Cavity with a Photonic Band Gap Coupler Cell.” Physical Review Accelerators and Beams 19, 8 (August 2016): 081301
Version
Final published version
Abstract
We present a study of higher order mode (HOM) damping in the first multicell superconducting radiofrequency (SRF) cavity with a photonic band gap (PBG) coupler cell. Achieving higher average beam currents is particularly desirable for future light sources and particle colliders based on SRF energy-recovery linacs (ERLs). Beam current in ERLs is limited by the beam breakup instability, caused by parasitic HOMs interacting with the beam in accelerating cavities. A PBG cell incorporated in an accelerating cavity can reduce the negative effect of HOMs by providing a frequency selective damping mechanism, thus allowing significantly higher beam currents. The five-cell cavity with a PBG cell was designed and optimized for HOM damping. Monopole and dipole HOMs were simulated. The SRF cavity was fabricated and tuned. External quality factors for some HOMs were measured in a cold test. The measurements agreed well with the simulations.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 3.0 Unported license
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DOI of Published Version
https://doi.org/10.1103/PHYSREVACCELBEAMS.19.081301
