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

作者：Clayton D J^*; Jaworski M A; Kumar D; Stutman D; Finkenthal M; Tritz K

来源：Review of Scientific Instruments, 2012, 83(10): 10D521.

DOI：10.1063/1.4732066

A divertor imaging radiometer (DIR) diagnostic is being studied to measure spatially and spectrally resolved radiated power P-rad(lambda) in the tokamak divertor. A dual transmission grating design, with extreme ultraviolet (similar to 20-200 angstrom) and vacuum ultraviolet (similar to 200-2000 angstrom) 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(lambda) measurements, providing a powerful code validation tool that can also be used to estimate electron divertor temperature and impurity transport.

• 出版日期2012-10