Comparison of different injection geometries
Source located on the wall, axially close to one of the magnetic field peaks.
In one case, the source emitted the neutral gas with a radial drift radially,
in the other case with an axial drift. All other simulation parameters are
identical. In the radial case, most ions get trapped in the magnetic field
and leave the bottle. In case of axial injection, a large population of ions
form in the center of the bottle. Color scheme: Purple: Oxygen +,
Yellow: Oxygen 2+, Pink: Oxygen 3+, Brown: Oxygen 4+.
Radial injection:
Axial injection:
Structure of the Oxygen 2+ population in the center of the source:
VENUS ECR Magnetic Field Configuration
Magnetic Bottle, without sextupole field
Magnetic Bottle with sextupole field
Vapor loading. Oven location close to field peaks
Vapor loading. Oven location in center
O+/elecrons distribution, center loading
Electron distribution in ECR source
Electron density distribution in a sextupol magnetic bottle (ECR source).
Projection along z of the electron density distribution in the
sextupol magnetic bottle.
Spatial distribution of the ion impact on the ECR cavity
walls.