Wake Fields in the Super B Factory Interaction Region

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The geometry of storage ring collider interaction regions present an impedance to beam fields resulting in the generation of additional electromagnetic fields (higher order modes or wake fields) which affect the beam energy and trajectory. These affects are computed for the Super B interaction region by evaluating longitudinal loss factors and averaged transverse kicks for short range wake fields. Results indicate at least a factor of 2 lower wake field power generation in comparison with the interaction region geometry of the PEP-II B-factory collider. Wake field reduction is a consderation in the Super B design. Transverse kicks are consistent with ... continued below

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3 pages

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Weathersby, Stephen; /SLAC; Novokhatski, Alexander & /SLAC June 2, 2011.

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The geometry of storage ring collider interaction regions present an impedance to beam fields resulting in the generation of additional electromagnetic fields (higher order modes or wake fields) which affect the beam energy and trajectory. These affects are computed for the Super B interaction region by evaluating longitudinal loss factors and averaged transverse kicks for short range wake fields. Results indicate at least a factor of 2 lower wake field power generation in comparison with the interaction region geometry of the PEP-II B-factory collider. Wake field reduction is a consderation in the Super B design. Transverse kicks are consistent with an attractive potential from the crotch nearest the beam trajectory. The longitudinal loss factor scales as the -2.5 power of the bunch length. A factor of 60 loss factor reduction is possible with crotch geometry based on an intersecting tubes model.

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3 pages

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  • Journal Name: Conf.Proc.C100523:TUPD081,2010; Conference: 1st International Particle Accelerator Conference: IPAC'10, 23-28 May 2010, Kyoto, Japan

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  • Report No.: SLAC-PUB-14449
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 1015611
  • Archival Resource Key: ark:/67531/metadc829490

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  • June 2, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Dec. 8, 2016, 1:47 p.m.

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Weathersby, Stephen; /SLAC; Novokhatski, Alexander & /SLAC. Wake Fields in the Super B Factory Interaction Region, article, June 2, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc829490/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.