Forbidden lines of highly ionized ions for localized plasma diagnostics

Conference · Sun Jun 01 04:00:00 EDT 1980

OSTI ID:5333219

Hinnov, E; Fonck, R; Suckewer, S

Numerous optically forbidden lines resulting from magnetic dipole transitions in low-lying electron configurations of highly ionized Fe, Ti and Cr atoms have been identified in PLT and PDX tokamak discharges, and applied for localized diagnostics in the high-temperature (0.5 to 3.0 keV) interior of these plasmas. The measurements include determination of local ion densities and their variation in time, and of ion motions (ion temperature, plasma rotations) through Doppler effect of the lines. These forbidden lines are particularly appropriate for such measurements because under typical tokamak conditions their emissivities are quite high (10/sup 11/ to 10/sup 14/ photons/cm/sup 3/-sec), and their relatively long wavelengths allow the use of intricate optical techniques and instrumentation. The spatial location of the emissivity is directly measurable, and tends to occur near radii where the ionization potential of the ion in question is equal to the local electron temperature. In future larger and presumably higher-temperature tokamaks analogous measurements with somewhat heavier atoms, particularly krypton, and perhaps zirconium appear both feasible and desirable.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AM02-76CH03073
• OSTI ID: 5333219
• Report Number(s): PPPL-1669; CONF-800320-4
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
DIVERTORS
DOPPLER EFFECT
ELECTRON TEMPERATURE
EMISSION SPECTRA
EMISSIVITY
ENERGY-LEVEL TRANSITIONS
FORBIDDEN TRANSITIONS
ION DENSITY
OPTICAL PROPERTIES
PDX DEVICES
PHYSICAL PROPERTIES
PLASMA DIAGNOSTICS
PLT DEVICES
SPECTRA
SURFACE PROPERTIES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS