Divertor electron temperature and impurity diffusion measurements with a spectrally resolved imaging radiometer

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4732066· OSTI ID:22093831

Clayton, D. J.; Kumar, D.; Stutman, D.; Finkenthal, M.; Tritz, K. ^[1]; Jaworski, M. A. ^[2]

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1. Johns Hopkins University, Baltimore, Maryland 21218 (United States)
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

A divertor imaging radiometer (DIR) diagnostic is being studied to measure spatially and spectrally resolved radiated power P{sub rad}({lambda}) in the tokamak divertor. A dual transmission grating design, with extreme ultraviolet ({approx}20-200 A) and vacuum ultraviolet ({approx}200-2000 A) gratings placed side-by-side, can produce coarse spectral resolution over a broad wavelength range covering emission from impurities over a wide temperature range. The DIR can thus be used to evaluate the separate P{sub rad} contributions from different ion species and charge states. Additionally, synthetic spectra from divertor simulations can be fit to P{sub rad}({lambda}) measurements, providing a powerful code validation tool that can also be used to estimate electron divertor temperature and impurity transport.

• OSTI ID: 22093831
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHARGE STATES
DESIGN
DIFFRACTION GRATINGS
DIFFUSION
DIVERTORS
ELECTRON TEMPERATURE
EMISSION
EXTREME ULTRAVIOLET RADIATION
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
RADIOMETERS
RESOLUTION
SIMULATION
SPECTRA
SPECTROSCOPY
TOKAMAK DEVICES
TRANSMISSION
WAVELENGTHS