Observations And Measurements of Anomalous Hollow Electron Beams in a Storage Ring

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Anomalous hollow electron beams have been recently observed in the Duke storage ring. With a single bunch beam in a lattice with a negative chromaticity, a hollow beam can be created. This beam consists of a solid core beam inside and a large ring beam outside. In this paper, we report the measurements of the hollow beam phenomenon, including its distinct image pattern and spectrum signature, and its evolution with time. By capturing the post-instability bursting beam, the hollow beam is a unique model system for studying transverse instabilities, in particular, the interplay of the wakefield and lattice nonlinearity. The ... continued below

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3 pages

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Wu, Y.K.; Li, J.; U., /Duke; Wu, J. & /SLAC February 6, 2006.

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Anomalous hollow electron beams have been recently observed in the Duke storage ring. With a single bunch beam in a lattice with a negative chromaticity, a hollow beam can be created. This beam consists of a solid core beam inside and a large ring beam outside. In this paper, we report the measurements of the hollow beam phenomenon, including its distinct image pattern and spectrum signature, and its evolution with time. By capturing the post-instability bursting beam, the hollow beam is a unique model system for studying transverse instabilities, in particular, the interplay of the wakefield and lattice nonlinearity. The hollow beam can also be used as a tool to study linear and nonlinear particle dynamics in the storage ring.

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3 pages

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  • Prepared for Particle Accelerator Conference (PAC 05), Knoxville, Tennessee, 16-20 May 2005

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  • Report No.: SLAC-PUB-11668
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 876049
  • Archival Resource Key: ark:/67531/metadc874020

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  • February 6, 2006

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 6, 2016, 2:26 p.m.

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Wu, Y.K.; Li, J.; U., /Duke; Wu, J. & /SLAC. Observations And Measurements of Anomalous Hollow Electron Beams in a Storage Ring, article, February 6, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc874020/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.