ISSN:
1089-7674
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Newly-developed perturbative (δf) particle simulation techniques are used to investigate the detailed stability and transport properties of an intense ion beam propagating through an alternating-gradient focusing lattice with initial Kapchinskij-Vladimirskij (KV) distribution. Stability properties are investigated over a wide range of beam current and focusing field strength. In the unstable region, large-amplitude density perturbations with low azimuthal harmonic numbers, concentrated near the beam surface, are observed, and their nonlinear consequences are discussed. In the stable region, it is shown that the KV beam distribution propagates quiescently over large distances (up to 500 lattice periods in the simulations). Theδf-scheme used in the present numerical studies exhibits minimal noise and accuracy problems in comparison with standard particle-in-cell simulations. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.872557