Measurements of Ion Temperature and Flow Velocity in Divertor Simulator MAP-II from Hydrogenic Helium Line Emission

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  • Rapid Communications Measurements of Ion Temperature and Flow Velocity in Divertor Simulator MAP-2 from Hydrogenic Helium Line Emission

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Abstract

Ion temperature and flow velocity in the MAP-II divertor simulator plasmas were measured using a high-resolution spectrometer combined with image expander optics which can also correct the astigmatism in spherical mirrors. The fine structure of the hydrogenic helium line was taken into consideration in the fitting procedures. This enables the comparison of the absolute flow velocity measurements between spectroscopy and the Mach probe.

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