• Open Access

Emittance preservation in plasma-based accelerators with ion motion

C. Benedetti, C. B. Schroeder, E. Esarey, and W. P. Leemans
Phys. Rev. Accel. Beams 20, 111301 – Published 1 November 2017

Abstract

In a plasma-accelerator-based linear collider, the density of matched, low-emittance, high-energy particle bunches required for collider applications can be orders of magnitude above the background ion density, leading to ion motion, perturbation of the focusing fields, and, hence, to beam emittance growth. By analyzing the response of the background ions to an ultrahigh density beam, analytical expressions, valid for nonrelativistic ion motion, are derived for the transverse wakefield and for the final (i.e., after saturation) bunch emittance. Analytical results are validated against numerical modeling. Initial beam distributions are derived that are equilibrium solutions, which require head-to-tail bunch shaping, enabling emittance preservation with ion motion.

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  • Received 16 June 2017

DOI:https://doi.org/10.1103/PhysRevAccelBeams.20.111301

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International 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

C. Benedetti, C. B. Schroeder, E. Esarey, and W. P. Leemans

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

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Issue

Vol. 20, Iss. 11 — November 2017

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