Plasma mass density, species mix and fluctuation diagnostics using fast Alfven wave

Conference · Sat Jun 01 04:00:00 EDT 1996

OSTI ID:441736

Ikezi, H; deGrassie, J S; Pinsker, R I; Snider, R T

The authors propose to employ a fast Alfven wave interferometer and reflectometer as a tokamak diagnostic to measure the plasma mass density, D-T species mix profile, and density fluctuations. Utilize the property that the phase velocity of the fast wave propagating across the magnetic field is the Alfven speed with thermal correction, this fast wave interferometer on the DIII-D tokamak was successfully used to obtain the line integrated density. Since the position of the ion-ion hybrid cut-off in tokamaks is uniquely determined by the species mix ratio and the wave frequency, the reflectometer arrangement finds the species mix profile. The inversion method of reflectometry is discussed. The multiple chord interferometer also measures the mass density fluctuation profile.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-89ER51114
• OSTI ID: 441736
• Report Number(s): GA--A22340; CONF-960543--42; ON: DE97002681
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
DOUBLET-3 DEVICE
HYBRID RESONANCE
IONIC COMPOSITION
PHASE VELOCITY
PLASMA DENSITY
PLASMA DIAGNOSTICS
REFRACTION