TY - JOUR
T1 - Coherent scattering in Nd-laser beat-wave experiments
T2 - Modulational instability in multiphoton ionization plasmas
AU - Amiranoff, F.
AU - Dyson, A.
AU - Laberge, M.
AU - Marquès, J. R.
AU - Moulin, F.
AU - Cros, B.
AU - Matthieussent, G.
AU - Stenz, C.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - The generation of long, 1 cm, and homogeneous plasmas, n ∼ 1017 cm-3, Δn/n ≤ 1%, by multi-photon ionization of low pressure gases, H2, D2 and N2 at pressures of a few torr, has been characterized by Thomson thermal scattering. After the initial full ionization, the hydrodynamic evolution due to the ponderomotive force of the laser itself is observed. In such plasmas, the modulational instability of high phase velocity plasma waves generated by Nd-laser beat-waves (Φ ∼ 1014 W cm-2) has been observed by Thomson scattering of an auxiliary green beam. Both ion waves, electron waves and their harmonics are detected when the plasma frequency is equal to the difference frequency between the two pump lasers.
AB - The generation of long, 1 cm, and homogeneous plasmas, n ∼ 1017 cm-3, Δn/n ≤ 1%, by multi-photon ionization of low pressure gases, H2, D2 and N2 at pressures of a few torr, has been characterized by Thomson thermal scattering. After the initial full ionization, the hydrodynamic evolution due to the ponderomotive force of the laser itself is observed. In such plasmas, the modulational instability of high phase velocity plasma waves generated by Nd-laser beat-waves (Φ ∼ 1014 W cm-2) has been observed by Thomson scattering of an auxiliary green beam. Both ion waves, electron waves and their harmonics are detected when the plasma frequency is equal to the difference frequency between the two pump lasers.
U2 - 10.1016/0021-9169(95)00139-5
DO - 10.1016/0021-9169(95)00139-5
M3 - Article
AN - SCOPUS:33750640052
SN - 0021-9169
VL - 58
SP - 1063
EP - 1067
JO - Journal of Atmospheric and Terrestrial Physics
JF - Journal of Atmospheric and Terrestrial Physics
IS - 8-9
ER -