• Open Access

Symmetric achromatic low-beta collider interaction region design concept

V. S. Morozov, Ya. S. Derbenev, F. Lin, and R. P. Johnson
Phys. Rev. ST Accel. Beams 16, 011004 – Published 28 January 2013

Abstract

We present a new symmetry-based concept for an achromatic low-beta collider interaction region design. A specially designed symmetric chromaticity compensation block (CCB) induces an angle spread in the passing beam such that it cancels the chromatic kick of the final focusing quadrupoles. Two such CCBs placed symmetrically around an interaction point allow simultaneous compensation of the 1st-order chromaticities and chromatic beam smear at the IP without inducing significant 2nd-order aberrations to the particle trajectory. We first develop an analytic description of this approach and explicitly formulate 2nd-order aberration compensation conditions at the interaction point. The concept is next applied to develop an interaction region design for the ion collider ring of an electron-ion collider. We numerically evaluate performance of the design in terms of momentum acceptance and dynamic aperture. The advantages of the new concept are illustrated by comparing it to the conventional distributed-sextupole chromaticity compensation scheme.

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  • Received 12 September 2012

DOI:https://doi.org/10.1103/PhysRevSTAB.16.011004

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

V. S. Morozov1, Ya. S. Derbenev1, F. Lin1, and R. P. Johnson2

  • 1Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
  • 2Muons, Inc., Batavia, Illinois 60510, USA

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Vol. 16, Iss. 1 — January 2013

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