Wave coupling in solar winds
Solar flares generate radio waves that are detected on Earth. Understanding these signals would allow to better anticipate flares and their effects. At LULI, laser-plasma interaction was able to reproduce some of these radio waves, in order to study their properties.
What we have achieved at LULI :
Solar flares generate intense pulses of electromagnetic radiation (solar bursts) in the radio frequency range (1-100 MHz), typically either at the plasma frequency (ωp) of the region from which they originate or at a multiple of that frequency (nth order harmonic at frequency nωp). These signals are the signature of electron beams propagating in the solar corona or the interplanetary medium. The knowledge of their properties would be an important advance for space meteorology, and help anticipate the effects on Earth of solar flares.