Nonlinear dynamics of inhomogeneous mismatched charged particle beams

Wave breaking and particle jets in intense inhomogeneous charged beams

Chaotic dynamics and halo formation in charged-particle beams

An old problem, but a new area of fundamental research, is characterizing orbital dynamics and its consequences in time-dependent potentials. Regarding nonequilibrium space-charge potentials, one clear consequence is halo formation. We show that orbital chaos normally plays a central role in halo formation. In turn, the ability to quantify chaos is centrally important. We show examples of the g...

Charged Particle Therapy with Mini-Segmented Beams

One of the fundamental attributes of proton therapy and carbon ion therapy is the ability of these charged particles to spare tissue distal to the targeted tumor. This significantly reduces normal tissue toxicity and has the potential to translate to a wider therapeutic index. Although, in general, particle therapy also reduces dose to the proximal tissues, particularly in the vicinity of the t...

Direct charged-particle measurements with stable beams

A number of examples for direct measurements in nuclear astrophysics are given in order to address several important issues. First, recent results for the 16O(p,γ)17F reaction are discussed and it is shown how an improvement in reaction rate precision allows for significantly improved astrophysical predictions in connection with massive AGB stars. Second, we discuss improved experimental techni...

Chaotic dynamics in charged-particle beams: possible analogs of galactic evolution.

During the last couple of years of his life, Henry Kandrup became intensely interested in using charged-particle beams as a tool for exploring the dynamics of evolving galaxies. He and I recognized that both galaxies and charged-particle beams can exhibit collisionless relaxation on surprisingly short time scales, and that this circumstance can be attributed to phase mixing of chaotic orbits. T...