• Open Access

Asymmetric dual axis energy recovery linac for ultrahigh flux sources of coherent x-ray and THz radiation: Investigations towards its ultimate performance

R. Ainsworth, G. Burt, I. V. Konoplev, and A. Seryi
Phys. Rev. Accel. Beams 19, 083502 – Published 19 August 2016

Abstract

In order for sources of coherent high brightness and intensity THz and x-ray radiation to be accepted by university or industrial R&D laboratories, truly compact, high current and efficient particle accelerators are required. The demand for compactness and efficiency can be satisfied by superconducting rf energy recovery linear accelerators (SRF ERL) allowing effectively minimizing the footprint and maximizing the efficiency of the system. However such setups are affected by regenerative beam break-up (BBU) instabilities which limit the beam current and may terminate the beam transport as well as energy recuperation. In this paper we suggest and discuss a SRF ERL with asymmetric configuration of resonantly coupled accelerating and decelerating cavities. In this type of SRF ERL an electron bunch is passing through accelerating and decelerating cavities once and, as we show in this case, the regenerative BBU instability can be minimized allowing high currents to be achieved. We study the BBU start current in such an asymmetric ERL via analytical and numerical models and discuss the properties of such a system.

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  • Received 20 July 2015

DOI:https://doi.org/10.1103/PhysRevAccelBeams.19.083502

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)

  1. Research Areas
Accelerators & Beams

Authors & Affiliations

R. Ainsworth1, G. Burt2, I. V. Konoplev1, and A. Seryi1

  • 1John Adams Institute at University of Oxford, OX1 3RH, Oxford, United Kingdom
  • 2Cockcroft Institute, Lancaster University, LA1 4YW, Lancaster, United Kingdom

Article Text

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Issue

Vol. 19, Iss. 8 — August 2016

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