Comparison of high group velocity accelerating structures

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It is well known that waveguides with no perturbations have phase velocities greater than the velocity of light c. If the waveguide dimensions are chosen so that the phase velocity is only moderately greater than c, only small perturbations are required to reduce the phase velocity to be synchronous with a high energy particle bunch. Such a lightly loaded accelerator structure will have smaller longitudinal and transverse wake potentials and hence will lead to lower emittance growth in an accelerated beam. Since these structures are lightly loaded, their group velocities are only slightly less than c and not in the ... continued below

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Pages: 4

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Farkas, Z.D. & Wilson, P.B. February 1, 1987.

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Description

It is well known that waveguides with no perturbations have phase velocities greater than the velocity of light c. If the waveguide dimensions are chosen so that the phase velocity is only moderately greater than c, only small perturbations are required to reduce the phase velocity to be synchronous with a high energy particle bunch. Such a lightly loaded accelerator structure will have smaller longitudinal and transverse wake potentials and hence will lead to lower emittance growth in an accelerated beam. Since these structures are lightly loaded, their group velocities are only slightly less than c and not in the order of 0.01c, as is the case for the standard disk-loaded structures. To ascertain that the peak and average power requirements for these structures are not prohibitive, we examine the elastance and the Q for several traveling wave structures: phase slip structures, bellows-like structures, and lightly loaded disk-loaded structures.

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Pages: 4

Notes

NTIS, PC A02/MF A01; 1.

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  • Particle accelerator conference, Washington, DC, USA, 16 Mar 1987

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  • Other: DE87008867
  • Report No.: SLAC-PUB-4088
  • Report No.: CONF-870302-125
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 6361278
  • Archival Resource Key: ark:/67531/metadc1205493

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • February 1, 1987

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Sept. 6, 2018, 4:52 p.m.

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Farkas, Z.D. & Wilson, P.B. Comparison of high group velocity accelerating structures, article, February 1, 1987; United States. (digital.library.unt.edu/ark:/67531/metadc1205493/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.