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

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Institut fuer Plasmaforschung, Pfaffenwaldring 31, D-7000 Stuttgart-80, Federal Republic of Germany
OSTI Identifier:
5761125
Resource Type:
Journal Article
Journal Name:
Rev. Sci. Instrum.; (United States)
Additional Journal Information:
Journal Volume: 56:5
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Holzhauer, E, and Kasparek, W. Measurement of the magnetic field direction in a plasma by collective scattering with a CO/sub 2/ laser. United States: N. p., 1985. Web. doi:10.1063/1.1138269.
Holzhauer, E, & Kasparek, W. Measurement of the magnetic field direction in a plasma by collective scattering with a CO/sub 2/ laser. United States. https://doi.org/10.1063/1.1138269
Holzhauer, E, and Kasparek, W. Wed . "Measurement of the magnetic field direction in a plasma by collective scattering with a CO/sub 2/ laser". United States. https://doi.org/10.1063/1.1138269.
@article{osti_5761125,
title = {Measurement of the magnetic field direction in a plasma by collective scattering with a CO/sub 2/ laser},
author = {Holzhauer, E and Kasparek, W},
abstractNote = {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.},
doi = {10.1063/1.1138269},
url = {https://www.osti.gov/biblio/5761125}, journal = {Rev. Sci. Instrum.; (United States)},
number = ,
volume = 56:5,
place = {United States},
year = {1985},
month = {5}
}