Collisionless relaxation in non-neutral plasmas
A theoretical framework is presented which allows us to quantitatively predict the final
stationary state achieved by a non-neutral plasma during a process of collisionless …
stationary state achieved by a non-neutral plasma during a process of collisionless …
Simulation study of halo formation in breathing round beams
H Okamoto, M Ikegami - Physical Review E, 1997 - APS
We study halo formation from cylindrical beams propagating in a uniform focusing channel.
Of particular interest here are the breathing-mode oscillations excited by an initial beam-size …
Of particular interest here are the breathing-mode oscillations excited by an initial beam-size …
Plasma-cascade instability
In this paper we describe a new microbunching instability occurring in charged particle
beams propagating along a straight trajectory. The nature of these exponentially growing …
beams propagating along a straight trajectory. The nature of these exponentially growing …
Space charge induced resonance excitation in high intensity rings
We present a particle core model study of the space charge effect on high intensity
synchrotron beams, with specific emphasis on the Proton Storage Ring (PSR) at Los Alamos …
synchrotron beams, with specific emphasis on the Proton Storage Ring (PSR) at Los Alamos …
Compensating tune spread induced by space charge in bunched beams
The effects of space charge play a significant role in modern-day accelerators, frequently
constraining the beam parameters attainable in an accelerator or in an accelerator chain …
constraining the beam parameters attainable in an accelerator or in an accelerator chain …
Halo formation in three-dimensional bunches with various phase space distributions
A realistic treatment of halo formation must take into account 3D beam bunches and 6D
phase space distributions. We recently constructed, analytically and numerically, a new …
phase space distributions. We recently constructed, analytically and numerically, a new …
Space-charge dominated beams in synchrotrons
SY Lee, H Okamoto - Physical review letters, 1998 - APS
The equations of motion for space-charge dominated beams in synchrotron are derived. We
find that the space-charge force generates an identical defocusing function to the betatron …
find that the space-charge force generates an identical defocusing function to the betatron …
Space charge dynamics in high intensity rings
Uncontrolled beam losses due to space-charge-induced halo generation are a concern in
high intensity rings, which are characterized by high beam intensities and low uncontrolled …
high intensity rings, which are characterized by high beam intensities and low uncontrolled …
Particle-core analysis of mismatched beams in a periodic focusing channel
M Ikegami - Physical Review E, 1999 - APS
A method is derived for applying particle-core analysis to mismatched beams in a periodic
focusing channel. By carefully choosing the parameters to yield a favorable core frequency …
focusing channel. By carefully choosing the parameters to yield a favorable core frequency …
Dynamical origin of non-thermal states in galactic filaments
Observations strongly suggest that filaments in galactic molecular clouds are in a non-
thermal state. As a simple model of a filament, we study a two-dimensional system of self …
thermal state. As a simple model of a filament, we study a two-dimensional system of self …