Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source

Lunin, A.; Khabiboulline, T.; Solyak, N.; Sukhanov, A.; Yakovlev, V.

doi:10.1103/PhysRevAccelBeams.21.022001

Title: Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source

Abstract

Construction of the Linac Coherent Light Source II (LCLS-II) is underway for the world’s first hard x-ray free-electron laser. A central part of the LCLS-II project is a 4 GeV superconducting radio frequency electron linac that will operate in the continuous wave (cw) mode. The linac is segmented into four sections named as L0, L1, L2, and L3. Two 3.9 GHz cryomodules, each housing of eight third-harmonic cavities similar to the cavities developed for the European X-ray Free Electron Laser (XFEL), will be used in section L1 of the linac for linearizing the longitudinal beam profile. Here in this paper, we present a study of trapped high order modes (HOMs) excited by a cw electron beam in the third-harmonic cavities of the LCLS-II linac. A detailed comparison of the original XFEL design and the LCLS-II design with a modified end group is performed in order to estimate the effect of a reduced beam pipe aperture on the efficiency of HOM damping. Furthermore, we apply a statistical analysis of the eigenmode spectrum for the estimation of the probability of resonant HOM losses and influence of HOMs on beam dynamics.

Authors:: Lunin, A.; Khabiboulline, T.; Solyak, N.; Sukhanov, A.; Yakovlev, V.

Publication Date:: Tue Feb 06 00:00:00 EST 2018

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1419707

Alternate Identifier(s):: OSTI ID: 1421534

Report Number(s):: FERMILAB-PUB-18-046-TD
Journal ID: ISSN 2469-9888; PRABCJ; 022001

Grant/Contract Number:: AC02-76SF00515; AC02-07CH11359

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 21 Journal Issue: 2; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    Lunin, A., Khabiboulline, T., Solyak, N., Sukhanov, A., and Yakovlev, V. Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source.  United States: N. p., 2018. 
Web.  doi:10.1103/PhysRevAccelBeams.21.022001.

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                    Lunin, A., Khabiboulline, T., Solyak, N., Sukhanov, A., & Yakovlev, V. Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source.  United States.  https://doi.org/10.1103/PhysRevAccelBeams.21.022001

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                    Lunin, A., Khabiboulline, T., Solyak, N., Sukhanov, A., and Yakovlev, V. Tue .  
"Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source".  United States.  https://doi.org/10.1103/PhysRevAccelBeams.21.022001.

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@article{osti_1419707,

  title        = {Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source},

  author       = {Lunin, A. and Khabiboulline, T. and Solyak, N. and Sukhanov, A. and Yakovlev, V.},

  abstractNote = {Construction of the Linac Coherent Light Source II (LCLS-II) is underway for the world’s first hard x-ray free-electron laser. A central part of the LCLS-II project is a 4 GeV superconducting radio frequency electron linac that will operate in the continuous wave (cw) mode. The linac is segmented into four sections named as L0, L1, L2, and L3. Two 3.9 GHz cryomodules, each housing of eight third-harmonic cavities similar to the cavities developed for the European X-ray Free Electron Laser (XFEL), will be used in section L1 of the linac for linearizing the longitudinal beam profile. Here in this paper, we present a study of trapped high order modes (HOMs) excited by a cw electron beam in the third-harmonic cavities of the LCLS-II linac. A detailed comparison of the original XFEL design and the LCLS-II design with a modified end group is performed in order to estimate the effect of a reduced beam pipe aperture on the efficiency of HOM damping. Furthermore, we apply a statistical analysis of the eigenmode spectrum for the estimation of the probability of resonant HOM losses and influence of HOMs on beam dynamics.},

  doi          = {10.1103/PhysRevAccelBeams.21.022001},

  journal      = {Physical Review Accelerators and Beams},

  number       = 2,

  volume       = 21,

  place        = {United States},

  year         = {Tue Feb 06 00:00:00 EST 2018},

  month        = {Tue Feb 06 00:00:00 EST 2018}

}

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Works referenced in this record:

High order modes in Project-X linac
journal, January 2014

Sukhanov, A.; Lunin, A.; Yakovlev, V.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 734
DOI: 10.1016/j.nima.2013.06.113

Eigenmode compendium of the third harmonic module of the European X-ray Free Electron Laser
journal, April 2017

Flisgen, Thomas; Heller, Johann; Galek, Tomasz
Physical Review Accelerators and Beams, Vol. 20, Issue 4
DOI: 10.1103/PhysRevAccelBeams.20.042002

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Title: Resonant excitation of high order modes in the 3.9 GHz cavity of the Linac Coherent Light Source

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Citation Formats

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