Measurement of the magnetic field direction in a plasma by collective scattering with a CO/sub 2/ laser

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

DOI:https://doi.org/10.1063/1.1138269· OSTI ID:5761125

Holzhauer, E; Kasparek, W

The effect of strongly magnetized electrons on the spectrum of collective electron density fluctuations can be used to measure the magnetic field direction in a plasma with laser light scattering. The application of this method to measure the poloidal field in tokamaks is discussed. It is shown that noncircular beam cross sections will increase the angular resolution without loss in spatial resolution. In experiments to measure the ion temperature this technique results in an increase of scattered power received. The magnetic field direction was measured for the first time in a laboratory plasma using a pulsed CO/sub 2/ laser and coherent detection.

• Research Organization: Institut fuer Plasmaforschung, Pfaffenwaldring 31, D-7000 Stuttgart-80, Federal Republic of Germany
• OSTI ID: 5761125
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 56:5
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
INFRARED SPECTROMETERS
TOKAMAK DEVICES
ION TEMPERATURE
LIGHT SCATTERING
MAGNETIC FIELDS
CARBON DIOXIDE LASERS
CROSS SECTIONS
ELECTRON DENSITY
SPATIAL RESOLUTION
CLOSED PLASMA DEVICES
GAS LASERS
LASERS
MEASURING INSTRUMENTS
RESOLUTION
SCATTERING
SPECTROMETERS
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics