Berlin 2001 – wissenschaftliches Programm

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AMPD: EPS AMPD

AMPD 9: Sitzung 9

AMPD 9.4: Vortrag

Freitag, 6. April 2001, 11:45–12:10, H105

Interaction of Laser Light with Plasmas — •H.-J. Kunze — Institut für Experimentalphysik V, Ruhr-Universität, 44780 Bochum, Germany

Laser radiation incident on laboratory plasmas interacts with all constituents of the plasma (electrons, ions, atoms, molecules), and the intensity and spectrum of the scattered fraction not only contains information on the individual scattering processes but also on various parameters of the plasma. Through nearly four decades Thomson scattering by the plasma electrons has developed into one of the most important diagnostic techniques for low- and high-temperature, low- and high-density plasmas. Although scattering by the electrons remains the fundamental process, depending on the parameter regime contributions may add up incoherently, the intensity and spectrum of the scattered radiation mirroring density and velocity distribution of the electrons in this limit, or they add coherently, the spectrum mirroring collective properties of the plasma.

After a survey of the potentials, current techniques, problems and results are discussed for the different parameter regimes ranging from low-density plasmas for technical applications to high density plasmas studied in inertial fusion experiments.