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Title: Higher order mode damping in a five-cell superconducting rf cavity with a photonic band gap coupler cell

Abstract

We propose 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 energyrecovery 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. Moreover, the measurements agreed well with the simulations.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Niowave Inc., Lansing, MI (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1280185
Alternate Identifier(s):
OSTI ID: 1505720
Grant/Contract Number:  
SC0009523; SC0010075
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 19 Journal Issue: 8; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Arsenyev, Sergey A., Temkin, Richard J., Shchegolkov, Dmitry Yu., Simakov, Evgenya I., Boulware, Chase H., Grimm, Terry L., and Rogacki, Adam R. Higher order mode damping in a five-cell superconducting rf cavity with a photonic band gap coupler cell. United States: N. p., 2016. Web. doi:10.1103/PhysRevAccelBeams.19.081301.
Arsenyev, Sergey A., Temkin, Richard J., Shchegolkov, Dmitry Yu., Simakov, Evgenya I., Boulware, Chase H., Grimm, Terry L., & Rogacki, Adam R. Higher order mode damping in a five-cell superconducting rf cavity with a photonic band gap coupler cell. United States. doi:10.1103/PhysRevAccelBeams.19.081301.
Arsenyev, Sergey A., Temkin, Richard J., Shchegolkov, Dmitry Yu., Simakov, Evgenya I., Boulware, Chase H., Grimm, Terry L., and Rogacki, Adam R. Mon . "Higher order mode damping in a five-cell superconducting rf cavity with a photonic band gap coupler cell". United States. doi:10.1103/PhysRevAccelBeams.19.081301.
@article{osti_1280185,
title = {Higher order mode damping in a five-cell superconducting rf cavity with a photonic band gap coupler cell},
author = {Arsenyev, Sergey A. and Temkin, Richard J. and Shchegolkov, Dmitry Yu. and Simakov, Evgenya I. and Boulware, Chase H. and Grimm, Terry L. and Rogacki, Adam R.},
abstractNote = {We propose 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 energyrecovery 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. Moreover, the measurements agreed well with the simulations.},
doi = {10.1103/PhysRevAccelBeams.19.081301},
journal = {Physical Review Accelerators and Beams},
number = 8,
volume = 19,
place = {United States},
year = {2016},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.19.081301

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