Vertical high-resolution Bragg x-ray spectrometer for the tokamak fusion test reactor

Journal Article · Fri Aug 01 00:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138711· OSTI ID:5564980

Bitter, M; Hill, K W; Cohen, S; von Goeler, S; Hsuan, H; Johnson, L C; Raftopulos, R; Reale, M; Schechtman, N; Sesnic, S; Spinos, F; Timberlake, J; Weicher, S; Young, N; Young, K M

A Bragg x-ray spectrometer of high spectral resolution (lambda/..delta..lambda = 10 000--20 000) which accommodates three crystals and position-sensitive detectors in the Johann configuration has been installed in the diagnostic basement of the tokamak fusion test reactor (TFTR) for the measurement of radial ion temperature profiles. The ion temperature is derived from the Doppler broadening of K-italic..cap alpha..-resonance lines of metal impurity ions, e.g., Ti, Cr, Fe, and Ni, in the helium-like and hydrogen-like charge states. The x-ray diffraction plane is almost perpendicular to the magnetic axis, but slightly tilted by an angle of 3.8/sup 0/, which makes it possible to measure poloidal and toroidal plasma rotation velocities of v-italic/sub THETA/>5 x 10/sup 3/ m/s and v-italic/sub Phi/>1 x 10/sup 5/ m/s, from the Doppler shift of spectral lines. Results obtained from the observation of TiXXl K-italic..cap alpha..-line spectra with a 220-silicon crystal of a 2d-italic spacing of 3.8400 A-circle and a curvature radius of 11.05 m are reported.

• Research Organization: Princeton University, Plasma Physics Laboratory, Princeton, New Jersey 08544
• OSTI ID: 5564980
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 57:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
X-RAY SPECTROMETERS
TFTR TOKAMAK
RESOLUTION
BEAM INJECTION HEATING
BRAGG REFLECTION
CONFIGURATION
IMPURITIES
ION TEMPERATURE
NEUTRAL ATOM BEAM INJECTION
PERFORMANCE
PLASMA CONFINEMENT
PLASMA DENSITY
TITANIUM IONS
X-RAY SPECTRA
BEAM INJECTION
CHARGED PARTICLES
CONFINEMENT
HEATING
IONS
MEASURING INSTRUMENTS
PLASMA HEATING
REFLECTION
SPECTRA
SPECTROMETERS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
700102* - Fusion Energy- Plasma Research- Diagnostics