Study of synchro-betatron coupling in IPNS upgrade RCS

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The 2 GeV rapidly-cycling synchrotron (RCS) of the proposed 1-MW spallation neutron source upgrade has 16 dispersion-free straight sections and eight straight sections with a dispersion of approximately 1 m. Six of the ten rf cavities are located in dispersion-free straight sections, and the remainder are located in the non-dispersion-free straight sections. The possibility of exciting synchro-betatron resonances is investigated in this paper. It is found that the effect of the coupling is not important to the RCS. Synchro-betatron resonances are driven in single beams by position-dependent energy gains from the accelerating fields. A primary cause is the dispersion at ... continued below

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5 p.

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Harkay, K.C. March 3, 1995.

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Description

The 2 GeV rapidly-cycling synchrotron (RCS) of the proposed 1-MW spallation neutron source upgrade has 16 dispersion-free straight sections and eight straight sections with a dispersion of approximately 1 m. Six of the ten rf cavities are located in dispersion-free straight sections, and the remainder are located in the non-dispersion-free straight sections. The possibility of exciting synchro-betatron resonances is investigated in this paper. It is found that the effect of the coupling is not important to the RCS. Synchro-betatron resonances are driven in single beams by position-dependent energy gains from the accelerating fields. A primary cause is the dispersion at the location of the rf cavities. Longitudinal and transverse motions are coupled due to a transverse deflection associated with a particle crossing the rf cavity gap. This changes the equilibrium orbit and excites betatron oscillations.

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5 p.

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INIS; OSTI as DE95013449

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  • Other Information: PBD: 3 Mar 1995

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  • Other: DE95013449
  • Report No.: NSA--95-3
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/83779 | External Link
  • Office of Scientific & Technical Information Report Number: 83779
  • Archival Resource Key: ark:/67531/metadc785719

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  • March 3, 1995

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  • Dec. 3, 2015, 9:30 a.m.

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  • Feb. 1, 2016, 1:55 p.m.

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Harkay, K.C. Study of synchro-betatron coupling in IPNS upgrade RCS, report, March 3, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc785719/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.