• Open Access

Beam induced electron cloud resonances in dipole magnetic fields

J. R. Calvey, W. Hartung, J. Makita, and M. Venturini
Phys. Rev. Accel. Beams 19, 074401 – Published 12 July 2016

Abstract

The buildup of low energy electrons in an accelerator, known as electron cloud, can be severely detrimental to machine performance. Under certain beam conditions, the beam can become resonant with the cloud dynamics, accelerating the buildup of electrons. This paper will examine two such effects: multipacting resonances, in which the cloud development time is resonant with the bunch spacing, and cyclotron resonances, in which the cyclotron period of electrons in a magnetic field is a multiple of bunch spacing. Both resonances have been studied directly in dipole fields using retarding field analyzers installed in the Cornell Electron Storage Ring. These measurements are supported by both analytical models and computer simulations.

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  • Received 16 March 2016

DOI:https://doi.org/10.1103/PhysRevAccelBeams.19.074401

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & Beams

Authors & Affiliations

J. R. Calvey*, W. Hartung, and J. Makita

  • Cornell Laboratory for Accelerator-based Sciences and Education, Cornell University, Ithaca, 14853 New York, USA

M. Venturini

  • Lawrence Berkeley National Laboratory, Berkeley, 94720 California, USA

  • *Present address: Advanced Photon Source, Argonne National Laboratory, 60439 Argonne, IL.
  • Present address: Facility for Rare Isotope Beams, Michigan State University, 48824 East Lansing, MI.
  • Present address: Department of Physics, Old Dominion University, 23529 Norfolk, VA.

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Issue

Vol. 19, Iss. 7 — July 2016

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