Degradation of multibunch luminosity in a linear collider due to cumulative beam breakup

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Beam-excited transverse wakes in accelerating radiofrequency structures will influence the transverse offsets of each bunch in a multibunch train, causing the projected emittance of the bunch train to grow. An analytic theory of this phenomenon that includes the mitigating influence of a correlated energy spread across the bunch train was recently devised and applied to electron-positron linear colliders. We use the results of this theory to estimate analytically the associated degradation of multibunch luminosity in terms of top-level parameters for the two beams, the two accelerators, and the final-focus system. Then we compare the estimates with results from GUINEA-PIG, a ... continued below

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Bohn, Courtlandt L.; Syphers, Michael J. & Schulte, Daniel June 26, 2001.

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Beam-excited transverse wakes in accelerating radiofrequency structures will influence the transverse offsets of each bunch in a multibunch train, causing the projected emittance of the bunch train to grow. An analytic theory of this phenomenon that includes the mitigating influence of a correlated energy spread across the bunch train was recently devised and applied to electron-positron linear colliders. We use the results of this theory to estimate analytically the associated degradation of multibunch luminosity in terms of top-level parameters for the two beams, the two accelerators, and the final-focus system. Then we compare the estimates with results from GUINEA-PIG, a code that includes the detailed physics of beam-beam interactions.

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56 Kilobytes pages

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  • Degradation of Multibunch Luminosity in a Particle Accelerator Conference 2001, Chicago, IL (US), 06/18/2001--06/22/2001

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  • Report No.: FERMILAB-Conf-01/138-T
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 782001
  • Archival Resource Key: ark:/67531/metadc716380

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  • June 26, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 1, 2016, 6:19 p.m.

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Bohn, Courtlandt L.; Syphers, Michael J. & Schulte, Daniel. Degradation of multibunch luminosity in a linear collider due to cumulative beam breakup, article, June 26, 2001; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc716380/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.