20 citations · 44 across the 9 of their papers we have counts for
9 papers
Characteristics of monotonic sheaths near a wall with grazing magnetic incidence
Alessandro Geraldini, Robert J. Ewart, Stephan Brunner +1
We consider a magnetised plasma in contact with an absorbing planar wall, where the angle between the magnetic field and the wall is small, (in radians) and the system…
On the importance of slow ions in the kinetic Bohm criterion
Alessandro Geraldini, Stephan Brunner
Between a plasma and a solid target lies a positively charged sheath of several Debye lengths in width, typically much smaller than the characteristic length scale …
Sheath constraints on turbulent magnetised plasmas
Alessandro Geraldini, Stephan Brunner, Felix I. Parra
A solid target in contact with a plasma charges (negatively) to reflect the more mobile species (electrons) and thus keep the bulk plasma quasineutral. To shield the bulk plasma fr…
Sheath collapse at critical shallow angle due to kinetic effects
Robert J Ewart, Felix I Parra, Alessandro Geraldini
The Debye sheath is known to vanish completely in magnetised plasmas for a sufficiently small electron gyroradius and small angle between the magnetic field and the wall. This angl…
An adjoint method for determining the sensitivity of island size to magnetic field variations
Alessandro Geraldini, Matt Landreman, Elizabeth Paul
An adjoint method to calculate the gradient of island width in stellarators is presented and applied to a set of magnetic field configurations. The underlying method of calculation…
Large gyro-orbit model of ion velocity distribution in plasma near a wall in a grazing-angle magnetic field
Alessandro Geraldini
A model is presented for the ion distribution function in a plasma at a solid target with a magnetic field inclined at a small angle, (in radians), to the targe…
Dependence on ion temperature of shallow-angle magnetic presheaths with adiabatic electrons
Alessandro Geraldini, Felix I Parra, Fulvio Militello
The magnetic presheath is a boundary layer occurring when magnetized plasma is in contact with a wall and the angle between the wall and the magnetic field is oblique…
Kinetic treatment of magnetized and collisionless plasma near a wall
Alessandro Geraldini
Charged particles gyrate around magnetic field lines, a property that is exploited to confine plasma in magnetic confinement fusion devices. Typically, the gyroradius is small comp…
Gyrokinetic treatment of a grazing angle magnetic field
Alessandro Geraldini, Felix I. Parra, Fulvio Militello
We develop a gyrokinetic treatment for ions in the magnetic presheath, close to the plasma-wall boundary. We focus on magnetic presheaths with a small magnetic field to wall angle,…