Spatially-Resolved Electron Density Measurement in Hydrogen Pellet Ablation Cloud
Department of Fusion Science, Sokendai, Toki 509-5292, Japan
National Institute for Fusion Science, Toki 509-5292, Japan
Author to whom correspondence should be addressed.
Received: 17 April 2018 / Revised: 11 May 2018 / Accepted: 4 June 2018 / Published: 11 June 2018
A spectroscopic method for spatial resolution measurement in fuel pellet ablation clouds is being developed in the Large Helical Device (LHD). Spatial resolution is obtained thanks to optics that have a narrow, band-shaped field-of-view. The Stark-broadened
emission line of a deuterium pellet ablation cloud is isolated and analyzed with a spectral lineshape code. The electron density profile of the ablation cloud along its direction of elongation is derived through least squares fitting. The obtained profile is peaked and has a dip at its center which confirms what can be found in simulations. Moreover, the order of magnitudes for the derived electron densities are in agreement with what has already been found in the LHD.
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MDPI and ACS Style
Seguineaud, G.; Motojima, G.; Narushima, Y.; Goto, M. Spatially-Resolved Electron Density Measurement in Hydrogen Pellet Ablation Cloud. Atoms 2018, 6, 34.
Seguineaud G, Motojima G, Narushima Y, Goto M. Spatially-Resolved Electron Density Measurement in Hydrogen Pellet Ablation Cloud. Atoms. 2018; 6(2):34.
Seguineaud, Guillaume; Motojima, Gen; Narushima, Yoshiro; Goto, Motoshi. 2018. "Spatially-Resolved Electron Density Measurement in Hydrogen Pellet Ablation Cloud." Atoms 6, no. 2: 34.
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