Measurements of laser coupling and plasma profiles in longer-scalelength plasmas. Memorandum report

Technical Report · Thu Sep 30 04:00:00 EDT 1982

OSTI ID:6084213

Herbst, M J; Burkhalter, P G; Grun, J; Obenschain, S P; Stamper, J A

Novel configuration of our two-beam laser allows laser-coupling experiments to be performed in longer-scalelength plasmas (Ln approx. equal to nc/10), which better simulate reactor-sized pellet plasmas. Preliminary observations show increased backscatter, as expected, but also reveal large reduction in 2 omega 0 and high-energy x-ray emissions. The latter may indicate lessened importance of resonance absorption in longer-scalelength plasmas. Measurements of plasma profiles are at least as important as coupling measurements in these experiments and we show new diagnostic techniques based upon tracer-dot methods. These include the first techniques available for velocity profile measurement, was well as an improved x-ray spectroscopic method for density and temperature profile measurement.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• OSTI ID: 6084213
• Report Number(s): AD-A-121043/4
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208* -- Fusion Power Plant Technology-- Inertial Confinement Technology
ABSORPTION
BACKSCATTERING
CHEMICAL REACTIONS
COUPLING
ENERGY TRANSFER
IMPLOSIONS
LASER IMPLOSIONS
LASER TARGETS
LASERS
REDUCTION
RESONANCE ABSORPTION
SCATTERING
SPECTRA
TARGETS
X-RAY SPECTRA