Far infrared and microwave plasma diagnostics

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Fusion Technology

OSTI ID:249576

Waidmann, G ^[1]

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1. Association EURATOM-KFA, Juelich (Germany)

The theory of electromagnetic wave propagation in a cold plasma is only briefly treated. Optical approximations made for diagnostic applications are mentioned. Refractive index measurements via FIR-interferometry are discussed and an electron density profile evaluation is illustrated. The principle of microwave reflectometry is presented and examples from fixed frequency and pulsed radar reflectometry are shown. The theoretical background of electron cyclotron emission is given in a simplified version and examples of electron temperature measurements on TEXTOR are presented. Scattering of mm-waves from high temperature plasmas is shortly sketched. An example of a rapidly growing density fluctuation in a critical operational situation is illustrated by collective wave scattering on a turbulent plasma. Magnetic field fluctuation studies carried out by cross-polarization scattering of microwaves are reported. 14 refs., 12 figs.

• OSTI ID: 249576
• Report Number(s): CONF-9509335--
• Journal Information: Fusion Technology, Journal Name: Fusion Technology Journal Issue: 2T Vol. 29; ISSN 0748-1896; ISSN FUSTE8
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
99 GENERAL AND MISCELLANEOUS
ELECTROMAGNETIC RADIATION
ELECTRON CYCLOTRON-RESONANCE
ELECTRON DENSITY
ELECTRON TEMPERATURE
INTERFEROMETRY
MAGNETIC FIELDS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEASURING METHODS
MICROWAVE RADIATION
PLASMA DIAGNOSTICS
RADAR
REFRACTIVE INDEX
SCATTERING