Effect of Wall Sheaths on Ion Trajectories in a Hall Thruster Numerical Model
Abstract
A 2D framework for solving the sheath equations near a dielectric corner has been developed and applied in a "quasi" 2D fashion to solve for sheath thickness and potential profile. When appropriate, boundary conditions were taken from an HPHall model of an SPT-70 Hall thruster. Ion paths within the sheath were also calculated. Results suggest that the radial acceleration provided by the sheath has the ability to produce significant changes in ion trajectories. However, the changes seen in the model are not large enough to explain high velocity, high angle ion populations seen in experiments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2009
- Accession Number
- ADA506237
Entities
People
- Ioannis G. Mikellides
- Joseph E. Shepherd
- Lee K. Johnson
- Michelle K. Scarfe
- Regina M. Sullivan
Organizations
- California Institute of Technology