Py. Cheung et al., STIMULATED RADIATION FROM STRONG LANGMUIR TURBULENCE IN IONOSPHERIC MODIFICATION, Physical review letters, 79(7), 1997, pp. 1273-1276
New measurements of stimulated electromagnetic emissions (SEE) in low
duty cycle heating experiments performed at the HIPAS Observatory are
presented. Two distinct types of spectra, a weak diffuse type and a st
ronger type with deep frequency modulations, were observed. These resu
lts have been compared with numerical predictions from a 1D driven and
damped Zakharov model and are found to be consistent with Langmuir co
llapse processes (strong spectra) and Langmuir turbulence of the coexi
stence type (weak spectra). Through this joint experimental and numeri
cal study, evidence of strong Langmuir turbulence via SEE measurements
has been demonstrated.