Excitation of strong Langmuir turbulence in plasmas near critical density - Application to HF heating of the ionosphere

Details Excitation of strong Langmuir turbulence in plasmas near critical density - Application to HF heating of the ionosphere Excitation of strong Langmuir turbulence in plasmas near critical density - Application to HF heating of the ionosphere

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9521221d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Dec. 1, 1990, p. 21221-21272. Research supported by DOE, U.S. Navy, a

Physics

82

Electrostatic Waves, Ionospheric Heating, Magnetohydrodynamic Turbulence, Plasma Density, Cavitons, Electron Energy, High Frequencies, Incoherent Scatter Radar, Power Spectra

Scientific paper

An extensive study of strong Langmuir turbulence (SLT) in plasmas excited near the critical density by intense coherent radiation beams is reported. Longtime simulation of Zakharov's model of SLT and related theoretical arguments lead to the conclusion that linear parametric instabilities may play a role only during the first few millisec after that turn-on in a quiescent ionosphere, but there is also the possibility of 'direct nucleation' of cavitons in preexisting density fluctuations. Both possibilities lead to Langmuir collapse. The turbulence is sustained by nucleation of trapped electric fields in burnt-out density cavities from previous collapses. This scenario explains several features of the observed incoherent scatter radar plasma line power spectra in early-time, low-duty cycle experiments.

Affiliated with

Also associated with

No associations

Rating

Excitation of strong Langmuir turbulence in plasmas near critical density - Application to HF heating of the ionosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Excitation of strong Langmuir turbulence in plasmas near critical density - Application to HF heating of the ionosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excitation of strong Langmuir turbulence in plasmas near critical density - Application to HF heating of the ionosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1631813