5 papers · 1 filter
Production of Enhanced Beam Halos via Collective Modes and Colored Noise
Ioannis V. Sideris, Courtlandt L. Bohn
We investigate how collective modes and colored noise conspire to produce a beam halo with much larger amplitude than could be generated by either phenomenon separately. The collec…
Chaotic Orbits in Thermal-Equilibrium Beams: Existence and Dynamical Implications
Courtlandt L. Bohn, Ioannis V. Sideris
Phase mixing of chaotic orbits exponentially distributes these orbits through their accessible phase space. This phenomenon, commonly called ``chaotic mixing'', stands in marked co…
Large Diffuse Halos in Time-Dependent Space-Charge Potentials with Colored Noise
C. L. Bohn, I. V. Sideris
We explore the potential impact of colored noise on space-charge-induced halo formation. By coupling particle orbits to parametric resonance, colored noise due to space-charge fluc…
Fluctuations Do Matter: Large Noise-Enhanced Halos in Charged-Particle Beams
Courtlandt L. Bohn, Ioannis V. Sideris
The formation of beam halos has customarily been described in terms of a particle-core model in which the space-charge field of the oscillating core drives particles to large ampli…
Chaos and the continuum limit in nonneutral plasmas and charged particle beams
Henry E. Kandrup, Ioannis V. Sideris, Courtlandt L. Bohn
This paper examines discreteness effects in nearly collisionless N-body systems of charged particles interacting via an unscreened r^-2 force, allowing for bulk potentials admittin…