corner
corner

Phys. Rev. ST Accel. Beams 10, 064002 (2007) [17 pages]

Symmetry-based design of fragment separator optics

Download: PDF (1,151 kB), One-column PDF (1,142 kB) Export: BibTeX or EndNote (RIS)

B. Erdelyi*
Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

J. Maloney
Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA

J. Nolen
Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

Received 16 February 2007; published 13 June 2007

Next-generation high-intensity large acceptance fragment separators require a careful design due to the large high order aberrations induced by the large aperture superconducting magnets needed to collect rare isotopes obtained from a high energy primary heavy-ion beam hitting a target. In this paper we propose a fragment separator layout based on various symmetries that satisfies the baseline requirements. Analytical calculations based on symmetry theories simplify the design to numerical optimization of a basic cell with only a few magnetic elements. The insight provided by these calculations resulted in the specification of a simple layout with large acceptance, transmission, and resolution. The design method may be easily adapted to project-specific needs. The important effects of energy degraders necessary for full fragment separator design will be addressed in a future publication.

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.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.10.064002
DOI:
10.1103/PhysRevSTAB.10.064002
PACS:
41.75.−i, 41.85.−p, 42.15.Fr

*erdelyi@anl.gov