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Full-Text Articles in Physical Sciences and Mathematics
A Multidimensional Characterization Of Muir Backscatter Spectra Resulting From Ionospheric Heating Experiments Performed At Haarp, Naseem Rayyan
A Multidimensional Characterization Of Muir Backscatter Spectra Resulting From Ionospheric Heating Experiments Performed At Haarp, Naseem Rayyan
Master's Theses and Doctoral Dissertations
The results of several atmospheric heating experiments, which we performed at the HAARP facility, are presented. We sought to provide a multidimensional characterization of the various artificial ionospheric heating features by varying HF aspect angle, HF pump frequency, UHF pointing angle, and heating pulse time. Through the use of the HAARP HF array and the MUIR UHF radar, we observed cascade (LDI), collapse (cavitons), parametric decay lines (PDI), outshifted plasma lines (OPL), overshoot, and artificial field aligned irregularities (AFAI), as well as some features that have not been previously studied, for instance, the “bursty” plasma lines. Through a collaborative effort …
Simultaneous Multi-Angle Measurements Of Plasma Turblence At Haarp, Naomi Watanabe
Simultaneous Multi-Angle Measurements Of Plasma Turblence At Haarp, Naomi Watanabe
Master's Theses and Doctoral Dissertations
We report the results from a recent series of experiments employing the HAARP HF transmitter to generate and study strong Langmuir turbulence (SLT) in the interaction region of overdense ionospheric plasma. Diagnostics included the Modular UHF Ionospheric Radar (MUIR) sited at HAARP, the Super DARN-Kodiak HF radar, and HF receivers to record stimulated electromagnetic emissions (SEE). Short pulse, low duty cycle experiments demonstrate control and suppression of artificial field-aligned irregularities (AFAI). This allows the isolation of ponderomotive plasma turbulence effects. For the first time, plasma line spectra measured simultaneously in different spots of the interaction region displayed marked but contemporaneous …