Three-dimensional continuous modeling of beam-electron cloud interaction: Comparison with analytic models and predictions for the present and future circular machines

Ghalam, A. Z.; Katsouleas, T.; Decyk, V. K.; Huang, C. K.; Mori, W. B.; Rumolo, G.; Benedetto, E.; Zimmermann, F.

doi:doi:10.1063/1.2198792

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Physics of Plasmas / Volume 13 / Issue 5 / INVITED PAPERS / Lasers, Particle Beams, Accelerators, Radiation Generation

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Phys. Plasmas 13, 056710 (2006); http://dx.doi.org/10.1063/1.2198792 (8 pages)

Three-dimensional continuous modeling of beam-electron cloud interaction: Comparison with analytic models and predictions for the present and future circular machines ^a

^a Paper LI2 3, Bull. Am. Phys. Soc. 50, 222 (2005).

A. Z. Ghalam¹, T. Katsouleas¹, V. K. Decyk², C. K. Huang², W. B. Mori², G. Rumolo³, E. Benedetto⁴, and F. Zimmermann⁴

¹University of Southern California (USC), Los Angeles, California
²University of California at Los Angeles (UCLA), Los Angeles, California
³German Science Institute (GSI), Darmstadt, Germany
⁴European Center for Nuclear Research (CERN), Geneva, Switzerland

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(Received 2 November 2005; accepted 6 February 2006; published online 30 May 2006)

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Abstract

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Long-term beam-electron cloud interaction is modeled with a three-dimensional parallel continuous model originally developed for plasma wakefield acceleration modeling. The simulation results are compared with the two-macroparticle model for strong head-tail instability. The two-macroparticle model captures some of the instability features of the beam; however, this model is too simple to accurately describe the complex nature of the beam-cloud interaction. The effects of dipole magnets on the horizontal and vertical beam size are discussed. The dipole magnets have stabilizing effect and reduce the beam spot size growth especially in the horizontal plane. The code is then used to model and make predictions for the beam dynamics in the presence of an electron cloud for several present and future circular machines around the world.

Article Outline

INTRODUCTION
COMPARING THE SIMULATION RESULTS WITH THE TWO MACRO-PARTICLE MODEL
RESULTS FOR SPECIFIC CURRENT AND FUTURE MACHINES
1. SLAC-PEP-II lower energy ring (LER) storage ring
2. CERN-LHC
THE EFFECTS OF BENDING MAGNETS ON CLOUD AND BEAM DYNAMICS
CONCLUSION

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KEYWORDS and PACS

Keywords

electron beams, plasma-beam interactions, plasma accelerators, plasma simulation, plasma instability

PACS

52.40.Mj

Particle beam interactions in plasmas
52.75.Di

Ion and plasma propulsion
52.65.Rr

Particle-in-cell method
52.35.Qz

Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.)

ARTICLE DATA

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http://dx.doi.org/10.1063/1.2198792

PUBLICATION DATA

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1070-664X (print)

1089-7674 (online)

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$abstract.society.value is a Member of CrossRef

American Institute of Physics

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