Time-resolved extreme ultraviolet study of PLT tokamak plasmas

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5937247

Stratton, B C

A grazing incidence time-resolving spectrograph developed for magnetically-confined fusion plasma diagnostics was used to study impurity emissions from Princeton Large Torus (PLT) tokamak plasmas. Experiments on line identification, ionic level populations, and impurity radiation during ICRF plasma heating are described. Calculations of level populations in highly-ionized atoms are used in interpreting spectroscopic data but have been experimentally checked in few cases. Measured relative intensities of many allowed transitions in the FI- BI-like ions of titanium, chromium, iron, nickel, and germanium are compared with values from published level population calculations. With a few exceptions, agreement is within 30%, the estimated error of the measurements, In iron, comparison of measured and calculated electron density-dependent line intensity ratios at two different densities shows that, in most cases, these ratios are reliable for density measurements. The similarity between tokamak and published solar-flare spectra is shown. The increase in impurity radiation during ICRF heating of PLT plasmas at power levels up to 3 MW was studied. Measurements of metallic impurity (titanium and iron) densities in a number of ICRF heating experiments are given.

• Research Organization: Johns Hopkins Univ., Baltimore, MD (USA)
• OSTI ID: 5937247
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
EXTREME ULTRAVIOLET RADIATION
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
IMPURITIES
IONS
PLASMA DIAGNOSTICS
PLASMA HEATING
PLT DEVICES
RADIATIONS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
ULTRAVIOLET RADIATION