• Open Access

Formation of a novel shaped bunch to enhance transformer ratio in collinear wakefield accelerators

B. Jiang, C. Jing, P. Schoessow, J. Power, and W. Gai
Phys. Rev. ST Accel. Beams 15, 011301 – Published 10 January 2012

Abstract

The transformer ratio, characterizing the ratio of maximum accelerating field behind the drive bunch to the maximum decelerating field inside the drive bunch, is one of the key parameters for characterizing the performance of collinear wakefield accelerators. In this paper the use of electron drive bunches possessing a particular temporal profile (the double-triangular bunch) is shown to significantly increase the transformer ratio beyond 2, the limit for a symmetric bunch. The double-triangular bunch is generated using the emittance exchange technique [P. Emma et al., Phys. Rev. ST Accel. Beams 9, 100702 (2006)]. Complete beam simulations have been performed for a collinear wakefield acceleration experiment planned at the Argonne Wakefield Accelerator facility including the effects of the physical emittance increase of the bunch in the wakefield device. A transformer ratio of 6.5 and gradient of 20MV/m is expected in this proof-of-principle experiment for a 3 nC double-triangular bunch traversing a 10 cm long, 200 GHz quartz based dielectric wakefield accelerator structure.

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  • Received 18 November 2011

DOI:https://doi.org/10.1103/PhysRevSTAB.15.011301

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

Authors & Affiliations

B. Jiang1,2, C. Jing1,3, P. Schoessow3, J. Power1, and W. Gai1

  • 1Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
  • 2Shanghai Institute of Applied Physics, CAS, Shanghai 201800, China
  • 3Euclid Techlabs, 5900 Harper Road, Solon, Ohio 44139, USA

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Vol. 15, Iss. 1 — January 2012

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