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- S.D. Webb, D.L. Bruhwiler
RadiaSoft LLC, Boulder, Colorado, USA
- V.V. Danilov
ORNL, Oak Ridge, Tennessee, USA
- R.A. Kishek
UMD, College Park, Maryland, USA
- S. Nagaitsev, A. Valishev
Fermilab, Batavia, Illinois, USA
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The IOTA test accelerator is under construction at FNAL to study a novel method of advancing the intensity frontier in storage rings: nonlinear integrable optics. For particles at the design momentum, the lattice has two invariants and the dynamics is integrable. In the ideal single-particle two-dimensional case, this yields bounded, regular orbits with extremely large tune spreads. Off-momentum effects such as dispersion and chromaticity, and collective effects such as direct space charge, break the integrability. We discuss the origin of this broken integrability for both single- and many-particle effects, and present simulation results for the IOTA lattice used as a high intensity proton storage ring.
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