Title

Plasma Properties & Diagnostics

Presenter Information

Christopher K. White

Department

Mechanical and Aerospace Engineering

Major

Aerospace and Electrical Engineering

Research Advisor

Rovey, Joshua L.

Advisor's Department

Mechanical and Aerospace Engineering

Funding Source

Missouri NASA Space Grant Consortium

Abstract

The first objective of this project was to design and create a microwave plasma source utilizing a copper and glass waveguide. The second objective was to design and construct a retarding potential analyzer and double and single langmuir probes to measure plasma properties and diagnostics. The third objective was to analyze the data to see if there is a trend between ion number density, electron temperature, floating potential, kinetic energy, potential energy, and plasma potential for varying pressures and electromagnetic fields.

Results from the Langmuir probe data conclude that the plasma potential is greater than the floating potential and as the electromagnetic field is increased the plasma potential increases slightly and the floating potential decreased slightly. In addition, the ion number density decreases slightly and the electron temperature increases slightly with increasing electromagnetic field. Results from the retarding potential analyzer data conclude that the potential energy is centered on the plasma potential which for varying electromagnetic field turned out to be around 22-24 Volts. Furthermore, with varying pressure the potential energy was centered around 18-20 Volts.

Biography

Christopher White is a senior and plans to graduate in May 2009 with a double major in Aerospace and Electrical Engineering. Christopher is also getting a double minor in Chemistry and Mathematics. He is currently a founding father of a new fraternity on campus called Delta Sigma Phi, which he has played a big role in leadership for the Rolla chapter. Christopher is planning on continuing his education after graduation while working for Dynetics in Huntsville, Alabama.

Research Category

Engineering

Presentation Type

Poster Presentation

Document Type

Poster

Award

Engineering poster session, Third place

Location

Upper Atrium/Hallway

Presentation Date

08 Apr 2009, 1:00 pm - 3:00 pm

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Apr 8th, 1:00 PM Apr 8th, 3:00 PM

Plasma Properties & Diagnostics

Upper Atrium/Hallway

The first objective of this project was to design and create a microwave plasma source utilizing a copper and glass waveguide. The second objective was to design and construct a retarding potential analyzer and double and single langmuir probes to measure plasma properties and diagnostics. The third objective was to analyze the data to see if there is a trend between ion number density, electron temperature, floating potential, kinetic energy, potential energy, and plasma potential for varying pressures and electromagnetic fields.

Results from the Langmuir probe data conclude that the plasma potential is greater than the floating potential and as the electromagnetic field is increased the plasma potential increases slightly and the floating potential decreased slightly. In addition, the ion number density decreases slightly and the electron temperature increases slightly with increasing electromagnetic field. Results from the retarding potential analyzer data conclude that the potential energy is centered on the plasma potential which for varying electromagnetic field turned out to be around 22-24 Volts. Furthermore, with varying pressure the potential energy was centered around 18-20 Volts.