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Implementation of Benchmarks for Precision Tracking in Storage Rings


Abstract

Currently, there is a much interest in making precision measurements utilizing storage rings. For example, the Muon g-2 experiment at Fermilab and the Electric Dipole Moment (EDM) program of the JEDI Collaboration require measurements of sub-ppm precision. Of particular importance is the ability to treat all nonlinear effects arising from detailed field distributions, including fringe fields.

In this paper, we track existing and proposed storage ring lattices using multiple codes and compare the results. The storage rings in question are the COSY Jülich ring at Forschungzentrum Jülich and the High Energy Storage Ring (HESR) to be constructed as part of FAIR at GSI. We present new results of tracking of the HESR lattice with COSY INFINITY, including full fringe fields, and the resulting dynamic aperture is estimated.

Finally, a set of benchmarks has been proposed to test the accuracy and speed of codes used for tracking orbital and spin dynamics in storage rings. We present a comparison of the results of such benchmarks with the codes COSY INFINITY, an eight-order Runge-Kutta Integrator, MADX, MAD8, and ZGOUBI tracking.


R. Hipple, M. Berz, in: 12th International Computational Accelerator Physics Conference 2015, (2016) 13


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