Tokamak Fusion Test Reactor horizontal high-resolution Bragg x-ray spectrometer (abstract)
A bent quartz-crystal spectrometer of the Johann type with a spectral resolution of lambda/..delta..lambda = 10000--25000 is used on the Tokamak Fusion Test Reactor (TFTR) to determine central plasma parameters from the spectra of helium-like and lithium-like metal impurity ions (Ti, Cr, Fe, and Ni). The spectra are observed along a central radial chord and are recorded by a position-sensitive multiwire proportional counter with a spatial resolution of 250 ..mu... Standard delay-line time-difference readout is employed. The data are histogrammed and stored in 64 K of memory providing 128 time groups of 512-channel spectra. The central ion temperature and the toroidal plasma rotation are inferred from the Doppler broadening and Doppler shift of the K..cap alpha.. lines. The central electron temperature, the distribution of ionization states, and dielectronic recombination rates are obtained from satellite-to-resonance line ratios. The performance of the spectrometer is demonstrated by measurements of the Ti XXI K..cap alpha.. radiation.
- Research Organization:
- Princeton University, Plasma Physics Laboratory, Princeton, New Jersey 08544
- OSTI ID:
- 5545601
- Journal Information:
- Rev. Sci. Instrum.; (United States), Vol. 56:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLASMA DIAGNOSTICS
X-RAY SPECTROMETERS
TFTR REACTORS
ELECTRON TEMPERATURE
ION TEMPERATURE
X-RAY SPECTRA
FABRICATION
PERFORMANCE
CHROMIUM IONS
DOPPLER BROADENING
EXPERIMENTAL DATA
IONIZATION
IRON IONS
LINE BROADENING
NICKEL IONS
PLASMA
RECOMBINATION
ROTATION
TITANIUM IONS
CHARGED PARTICLES
DATA
INFORMATION
IONS
MEASURING INSTRUMENTS
MOTION
NUMERICAL DATA
SPECTRA
SPECTROMETERS
700102* - Fusion Energy- Plasma Research- Diagnostics