SIMULATING HIGH-INTENSITY PROTON BEAMS IN NONLINEAR

High-intensity proton linacs and storage rings are essential for a) state-of-the-art neutron source user facilities, b) extending the high-energy physics intensity frontier, c) as a driver to generate pions for a future neutrino factory or muon collider, and d) for transmutation of radioactive waste and associated energy production. For example, Project X at Fermilab will deliver MW proton beams at energies ranging from 3 to 120 GeV. Nonlinear magnetic lattices with large tune spreads and with integrable, nearly integrable and chaotic dynamics have been proposed to maximize dynamic aperture and minimize particle loss. We present PyORBIT simulations of proton dynamics in such lattices, including the effects of transverse space charge for the first time.