Longitudinal emittance oscillation in a superconducting drift tube linac

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In drift tube linacs a beam energy spread results form the finite beam size. Radial variation of the axial accelerating field induces a beam energy spread, which, in general, will accumulate as the beam passes through successive drift tubes. This paper shows that under some conditions of periodic transverse focusing and longitudinal phase focusing, the correlation between the longitudinal and transverse motion can be used to correct the energy spread. The process of achieving such a correction is first described in a simplified situation, and then demonstrated for a particular tuning using a ray-tracing program which models a low velocity ... continued below

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4 p.

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Kim, J.W. & Shepard, K.W. July 1, 1995.

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Description

In drift tube linacs a beam energy spread results form the finite beam size. Radial variation of the axial accelerating field induces a beam energy spread, which, in general, will accumulate as the beam passes through successive drift tubes. This paper shows that under some conditions of periodic transverse focusing and longitudinal phase focusing, the correlation between the longitudinal and transverse motion can be used to correct the energy spread. The process of achieving such a correction is first described in a simplified situation, and then demonstrated for a particular tuning using a ray-tracing program which models a low velocity and low charge state linac designed for radioactive ion beams.

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4 p.

Notes

INIS; OSTI as DE95013784

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  • 16. Institute of Electrical and Electronic Engineers (IEEE) particle accelerator conference, Dallas, TX (United States), 1-5 May 1995

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  • Other: DE95013784
  • Report No.: ANL/PHY/CP--85352
  • Report No.: CONF-950512--240
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 82341
  • Archival Resource Key: ark:/67531/metadc782341

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Office of Scientific & Technical Information Technical Reports

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  • July 1, 1995

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  • Dec. 3, 2015, 9:30 a.m.

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  • Dec. 11, 2015, 5:06 p.m.

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Kim, J.W. & Shepard, K.W. Longitudinal emittance oscillation in a superconducting drift tube linac, article, July 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc782341/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.