Validation and Characterization of a Laboratory Ion Source for Testing Thermal Space-Plasma Instruments

Prior to launch, space craft instruments need to be tested in a relevant environment to prove operational functionality. Thus, we have developed an ion source to stimulate thermal plasma instruments in a vacuum chamber. This dissertation presents the mechanical design of the source, simulations of the potentials and charged particle trajectories in and around the source, and vacuum chamber measurements of the emitted ion beam. Once the ion source is understood, it is successfully used to test a typical ion instrument. Further aspects of the ion source, efficiency, thermionic filament emission, and collision frequencies are also discussed.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Electrical Engineering

Department dc:contributor.department

Electrical Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2019

Author dc:creator

• Robertson, Ellen Faith

Chair dc:contributor.committeechair

• Earle, Gregory D.

Committee members dc:contributor.committeemember

• Tront, Joseph G.
• Srinivasan, Bhuvana
• Scales, Wayne A.
• Bailey, Scott M.

• Space Science
• Ion source
• Simulations
• Plasma
• Vacuum Testing
• Satellite Instrumentation

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

vt_gsexam:22441

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/94631