Determination of ion temperature and rotation velocity profiles by visible, uv, and x-ray spectroscopy on Doublet 3

Conference · Thu Nov 01 04:00:00 EST 1984

OSTI ID:5594652

Burrell, K H; Brooks, N H; Groebner, R J; Lee, P; Lieber, A J; Rottler, C L; Seraydarian, R P; Wojtowicz, S

Spectroscopic diagnostics are utilized extensively on the Doublet 3 Tokamak to determine ion temperature and toroidal rotation speed by means of the Doppler broadening and Doppler shift of spectral lines radiated by various impurity ions. Ion temperatures up to 6 keV and rotation speeds up to 300 km/s have been measured. Equipment employed in the four main systems ranges from visible spectrometers to a high-resolution Bragg crystal x-ray spectrometer. Among the lines employed are visible and uv magnetic dipole lines of metallic impurities (e.g., Ti, Fe, and Ni) visible and uv lines of He, C, and O excited by charge-exchange recombination with neutrals from one of the hydrogen heating beams and x-ray lines from He-like and Li-like Ti. The various systems give ion temperature profile information for discharges heated by Ohmic, neutral beam injection and electron cyclotron heating. Under neutral beam conditions, the systems based on charge exchange excitation produce seven point profiles every 20 ms for the duration of the heating pulse. The hardware utilized in each system, the theoretical basis for the data analysis and some of the difficulties encountered in extracting the desired information from complex spectra are discussed.

• Research Organization: GA Technologies, Inc., San Diego, CA (USA)
• OSTI ID: 5594652
• Report Number(s): N-85-18734; CONF-8411168-
• 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
BEAM INJECTION
CHARGE EXCHANGE
CLOSED PLASMA DEVICES
DOUBLET REACTORS
EMISSION SPECTROSCOPY
ION TEMPERATURE
PLASMA DIAGNOSTICS
SPECTROSCOPY
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS