Date Approved


Degree Type

Open Access Thesis

Degree Name

Master of Science (MS)

Department or School

Physics and Astronomy

Committee Member

James Sheerin, PhD, Advisor

Committee Member

Alexandria Oakes, PhD, Department Head

Committee Member

J. Marshall Thomsen, PhD


Studies of nonlinear ionospheric interactions were undertaken at the High Frequency Active Auroral Research Program (HAARP) site in Alaska using the co-located Modular UHF Incoherent scatter Radar (MUIR). High frequency heating of the ionosphere produced plasma wave decay processes, the signatures of which were received by MUIR and interpreted with spectral analysis in MATLAB. The most commonly observed decay scheme was that of the Parametric Decay Instability, producing the distinct multifrequency cascade feature in the HF backscatter. The results presented here are intended to contribute to the understanding of HF heating facility capabilities, plasma wave decay processes, and diagnostic instrument implementation in experimental analysis.

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