The electron-cloud instability in PEP-II: An update

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The authors present an update on the estimate of the growth time of the multi-bunch transverse instability in the PEP-II collider arising from the interaction of the positron beam with the accumulated electron cloud. They estimate the contributions to the growth rate arising from the dipole magnets and from the pumping straight sections. They emphasize those quantities upon which the instability is most sensitive. The simulation includes measured data on the secondary emission yield for TiN-coated samples of the actual vacuum chamber. Although the analysis is still in progress, they conclude that the instability risetime is of order 1 ms, ... continued below

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6 p.

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Furman, M.A. & Lambertson, G.R. May 1, 1997.

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Description

The authors present an update on the estimate of the growth time of the multi-bunch transverse instability in the PEP-II collider arising from the interaction of the positron beam with the accumulated electron cloud. They estimate the contributions to the growth rate arising from the dipole magnets and from the pumping straight sections. They emphasize those quantities upon which the instability is most sensitive. The simulation includes measured data on the secondary emission yield for TiN-coated samples of the actual vacuum chamber. Although the analysis is still in progress, they conclude that the instability risetime is of order 1 ms, which is well within the range controllable by the feedback system.

Physical Description

6 p.

Notes

INIS; OSTI as DE97007323

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  • 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997

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  • Other: DE97007323
  • Report No.: LBNL--40256
  • Report No.: CONF-970503--148
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/505358 | External Link
  • Office of Scientific & Technical Information Report Number: 505358
  • Archival Resource Key: ark:/67531/metadc692999

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  • May 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 5, 2016, 1:18 p.m.

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Furman, M.A. & Lambertson, G.R. The electron-cloud instability in PEP-II: An update, report, May 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc692999/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.