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

A divertor imaging radiometer (DIR) diagnostic is being studied to measure spatially and spectrally resolved radiated power P(rad)(λ) in the tokamak divertor. A dual transmission grating design, with extreme ultraviolet (~20-200 Å) and vacuum ultraviolet (~200-2000 Å) gratings placed side-by-side, c...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2012-10, Vol.83 (10), p.10D521-10D521
Main Authors: Clayton, D J, Jaworski, M A, Kumar, D, Stutman, D, Finkenthal, M, Tritz, K
Format: Article
Language:English
Subjects:
Charge
CHARGE STATES
DESIGN
DIFFRACTION GRATINGS
DIFFUSION
DIVERTORS
ELECTRON TEMPERATURE
EMISSION
EXTREME ULTRAVIOLET RADIATION
Gratings (spectra)
Imaging radiometers
Impurities
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
PLASMA DIAGNOSTICS
PLASMA IMPURITIES
RADIOMETERS
RESOLUTION
SIMULATION
SPECTRA
SPECTROSCOPY
TOKAMAK DEVICES
TRANSMISSION
Ultraviolet
WAVELENGTHS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A divertor imaging radiometer (DIR) diagnostic is being studied to measure spatially and spectrally resolved radiated power P(rad)(λ) in the tokamak divertor. A dual transmission grating design, with extreme ultraviolet (~20-200 Å) and vacuum ultraviolet (~200-2000 Å) 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(rad) contributions from different ion species and charge states. Additionally, synthetic spectra from divertor simulations can be fit to P(rad)(λ) measurements, providing a powerful code validation tool that can also be used to estimate electron divertor temperature and impurity transport.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4732066