Estimate of the Deposition Profile of Carbon Pellets Using a High-Speed VUV Imaging System in the LHD

MING Tingfeng (明廷凤); Satoshi OHDACHI; Yasuhiro SUZUKI; LHD Experiment Group

doi:10.1088/1009-0630/15/12/03

Plasma Science and Technology > 2013 > 15(12): 1178-1184. > DOI: 10.1088/1009-0630/15/12/03

MING Tingfeng (明廷凤), Satoshi OHDACHI, Yasuhiro SUZUKI, LHD Experiment Group. Estimate of the Deposition Profile of Carbon Pellets Using a High-Speed VUV Imaging System in the LHD[J]. Plasma Science and Technology, 2013, 15(12): 1178-1184. DOI: 10.1088/1009-0630/15/12/03

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Estimate of the Deposition Profile of Carbon Pellets Using a High-Speed VUV Imaging System in the LHD

1 The Graduate University for Advanced Studies, 322-6 Oroshi-cho, Toki 509-5292, Japan 2 National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan

Funds: supported by the NIFS budget code ULPP021, the Ministry of Education Science, Sports and Culture, Grant-in-Aid for Scientific Research (B) 23340184, and partially supported by the JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics (No.11261140328)

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Received Date: August 09, 2012

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Abstract

Abstract

The deposition profile of the impurity pellet is measured by a two-dimensional fast- framing vacuum ultraviolet (VUV) camera system in the large helical device (LHD). The fast framing camera selectively measures the emission from the hydrogen-like ions of carbon (C VI) with a frame rate of several kHz. From the emission profile of the hydrogen-like carbon ions, which are in the process of ionization, the initial deposition profile of the carbon is estimated using a simple one-dimensional transport model.
- VUV,
- impurity transport,
- carbon pellet injection,
- LHD

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