Ion temperature measurement in a plasma column using pulsed CO/sub 2/ collective scattering and coherent detection

Journal Article · Wed May 01 04:00:00 EDT 1985 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138268· OSTI ID:5539495

Lachambre, J; Decoste, R

We describe a pulsed CO/sub 2/ laser scattering apparatus set up to measure the ion temperature of a magnetically stabilized arc plasma (n/sub e/ approx. =10/sup 21/ m/sup -3/, T/sub e/ approx. =5 eV). Sensitivity and spectral resolution considerations led us to use heterodyne detection with a separate local oscillator and a multichannel rf frequency analyzer. The forward scattering angle is chosen to be 5/sup 0/ in order to match the expected ion feature spectrum to the receiver bandwidth and also to eliminate spontaneous fluctuations from the small-k, large-amplitude signal. Experimental scattering spectra illustrate the apparatus sensitivity to discharge current. The ion temperature appears to be determined to +- 10%. Applications to high-temperature fusion plasmas are discussed.

• Research Organization: Institut de Recherche d'Hydro-Quebec, C.P. 1000, Varennes, Quebec, Canada J0L 2P0
• OSTI ID: 5539495
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 56:5; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CARBON DIOXIDE LASERS
CLOSED PLASMA DEVICES
DATA
DESIGN
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY RESOLUTION
EQUIPMENT
EXPERIMENTAL DATA
FEASIBILITY STUDIES
FLUIDS
GAS LASERS
GASES
HELIUM
HETERODYNE RECEIVERS
INFORMATION
ION TEMPERATURE
LASER RADIATION
LASERS
LIGHT SCATTERING
MICROWAVE EQUIPMENT
NONMETALS
NUMERICAL DATA
OSCILLATORS
PLASMA
PLASMA DIAGNOSTICS
RADIATIONS
RADIO EQUIPMENT
RARE GASES
RESOLUTION
SCATTERING
SENSITIVITY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES