Density fluctuation spectra of a collision-dominated plasma measured by light scattering

Journal Article · Mon Apr 17 04:00:00 EDT 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.1848· OSTI ID:6164966

Zhang, Y Q; DeSilva, A W; Mostovych, A N

The low-frequency electron density spectral function S(k,..omega..), having an ion acoustic peak (at ..omega../similar to/kc/sub s/) and an entropy peak (..omega.. = 0), has been measured by light scattering in a thermal collisional argon arc plasma. The entropy peak is for the first time observed in a plasma. A prediction of the spectrum derived from Braginskii's equations is adopted to estimate the transport coefficients. Ion viscosity, ion thermal conductivity, and electron-ion energy-transfer frequency determined from fitting to the data differ from predictions by -39%, +16%, and -22%, respectively.

• Research Organization: Laboratory for Plasma and Fusion Energy Studies, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6164966
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:16; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ARGON
CARBON DIOXIDE LASERS
COLLISIONAL PLASMA
COLLISIONS
CURRENTS
ELECTRIC ARCS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ELEMENTS
ENERGY TRANSFER
ENTROPY
FLUCTUATIONS
FLUIDS
GAS LASERS
GASES
ION ACOUSTIC WAVES
ION COLLISIONS
ION WAVES
LASERS
LIGHT SCATTERING
NONMETALS
PHYSICAL PROPERTIES
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA WAVES
RARE GASES
SCATTERING
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VARIATIONS
VISCOSITY