Damping Effect Studies for X-band Normal Conducting High Gradient Standing Wave Structures

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The Multi-TeV colliders should have the capability to accelerate low emittance beam with high rf efficiency, X-band normal conducting high gradient accelerating structure is one of the promising candidate. However, the long range transverse wake field which can cause beam emittance dilution is one of the critical issues. We examined effectiveness of dipole mode damping in three kinds of X-band, {pi}-mode standing wave structures at 11.424GHz with no detuning considered. They represent three damping schemes: damping with cylindrical iris slot, damping with choke cavity and damping with waveguide coupler. We try to reduce external Q factor below 20 in the ... continued below

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4 pages

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Pei, S.; Li, Z.; Tantawi, S.G.; Dolgashev, V.A.; Wang, J. & /SLAC August 3, 2009.

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The Multi-TeV colliders should have the capability to accelerate low emittance beam with high rf efficiency, X-band normal conducting high gradient accelerating structure is one of the promising candidate. However, the long range transverse wake field which can cause beam emittance dilution is one of the critical issues. We examined effectiveness of dipole mode damping in three kinds of X-band, {pi}-mode standing wave structures at 11.424GHz with no detuning considered. They represent three damping schemes: damping with cylindrical iris slot, damping with choke cavity and damping with waveguide coupler. We try to reduce external Q factor below 20 in the first two dipole bands, which usually have very high (R{sub T}/Q){sub T}. The effect of damping on the acceleration mode is also discussed.

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4 pages

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  • Contributed to Particle Accelerator Conference (PAC 09), Vancouver, BC, Canada, 4-8 May 2009

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  • Report No.: SLAC-PUB-13724
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 962096
  • Archival Resource Key: ark:/67531/metadc928652

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Office of Scientific & Technical Information Technical Reports

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  • August 3, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 15, 2016, 3:22 p.m.

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Pei, S.; Li, Z.; Tantawi, S.G.; Dolgashev, V.A.; Wang, J. & /SLAC. Damping Effect Studies for X-band Normal Conducting High Gradient Standing Wave Structures, article, August 3, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc928652/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.