Computer Science – Sound
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.8917s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol 99, no. A5, p. 8917-8923
Computer Science
Sound
3
Beam Currents, Beam Injection, Electromagnetic Wave Transmission, Electron Beams, Extremely Low Frequencies, Ionospheric Propagation, Ionospheric Sounding, Power Spectra, Rocket Sounding, Sidebands, Stimulated Emission, Very Low Frequencies, Data Reduction, Plasma Physics, Sounding Rockets
Scientific paper
Sideband wave emissions are secondary peaks in wave power observed at frequencies above and below the primary peak. Observed sidebands amplitudes are usually reduced compared to the primary wave amplitude. During the recent CHARGE 2B ionospheric rocket mission, sideband waves were observed during an electron beam injection experiment. The beam current was modulated causing a peak in wave power at the modulation frequency and at certain times sidebands were observed along with the primary wave emission. A nonlinear coupling mechanism between the primary wave and a lower-frequency wave is explored here to explain the presence of the sideband emissions. Comparison of the theoretical results with the wave data confirm this mechanism as a viable explanation for the observed sidebands.
Ashour-Abdalla Maha
Ernstmeyer James
Schriver David
Sotnikov Vladimir I.
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