Thomson scattering at plasma densities below 10/sup 12/ cm/sup -3/

Journal Article · Tue Jan 01 04:00:00 EST 1985 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138478· OSTI ID:5984858

Cobble, J A

Major upgrades in the ruby-laser Thomson scattering system on the microwave-driven ELMO Bumpy Torus-Scale plasma have enabled routine and reliable measurements of the electron temperature and density along a plasma radius. Consisting of both signal-to-noise enhancement techniques and refined data handling procedures, these upgrades allow density determinations down to 2 x 10/sup 11/ cm/sup -3/. Radial profiles of bulk electron parameters are essentially flat across the core plasma. Evidence is presented for a 10/sup 11/-cm/sup -3/ density suprathermal distribution of electrons, which leads to an understanding of contradictory temperature measurements and of energy flow in the plasma.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• OSTI ID: 5984858
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 56:1; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
BUMPY TORI
COHERENT SCATTERING
DATA
DATA ACQUISITION SYSTEMS
DISTRIBUTION
DISTRIBUTION FUNCTIONS
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
ELMO BUMPY TORUS
ELMO DEVICES
EMISSION SPECTROSCOPY
ENERGY TRANSFER
EXPERIMENTAL DATA
FUNCTIONS
INELASTIC SCATTERING
INFORMATION
LASERS
LIGHT TRANSMISSION
MAGNETIC MIRRORS
MICROWAVE RADIATION
NUMERICAL DATA
OPEN PLASMA DEVICES
PLASMA DENSITY
PLASMA DIAGNOSTICS
RADIATIONS
RAMAN EFFECT
RAYLEIGH SCATTERING
RUBY LASERS
SCATTERING
SOLID STATE LASERS
SPATIAL DISTRIBUTION
SPECTROPHOTOMETRY
SPECTROSCOPY
SPUTTERING
THERMONUCLEAR DEVICES
THOMSON SCATTERING