Statistics – Computation
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...193..293m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 293-297.
Statistics
Computation
4
Electron Beams, Electrostatic Waves, Plasma Radiation, Solar Corona, Solar Flares, Solar X-Rays, Computational Grids, Time Dependence
Scientific paper
We investigate the generation of Langmuir waves by a time dependent thick target electron beam in the solar corona. It is shown that, as far as wave generation is concerned, the beam can be treated as if it were in a steady state if the electrons are injected on a timescale greater than about 1s. If the injection timescale is as short as 100 ms, however, the energy density of Langmuir waves produced by a given instantaneous flux of electrons may be amplified by as much as an order of magnitude. We argue that the wavelevel is nevertheless unlikely to exceed the threshold for strong turbulence (i.e. the modulational instability), and that the propagation of thick target beams can therefore be adequately described using the quasi-linear theory. It is concluded that microwave bursts which drift towards higher frequencies with time may be attributed to 2nd harmonic plasma radiation, resulting from the coalescence of beam-excited Langmuir waves.
No associations
LandOfFree
Langmuir wave generation by electron beams producing short timescale hard X-ray emission in solar flares 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 Langmuir wave generation by electron beams producing short timescale hard X-ray emission in solar flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Langmuir wave generation by electron beams producing short timescale hard X-ray emission in solar flares will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1670104