[Table of Contents]

Plasma and Fusion Research

Volume 10, 3402036 (2015)

Regular Articles


Evaluation of Zeff Profile in Low-Density and High-Ti Discharges with Carbon Pellet Injection based on Space-Resolved EUV Spectroscopy in LHD
Xianli HUANG1), Shigeru MORITA1,2), Tetsutarou OISHI1,2), Motoshi GOTO1,2) and Hongming ZHANG1)
1)
Department of Fusion Science, Graduate University for Advanced Studies, Toki, Gifu 509-5292, Japan
2)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
(Received 24 November 2014 / Accepted 26 February 2015 / Published 16 April 2015)

Abstract

Zeff profile analysis has been carried out in a low-density and high-Ti discharge with carbon pellet injection. The evolution of the Zeff profile shows a centrally peaked profile just after the pellet injection while the profile gradually returns to an original flat profile as a function of time. Comparison between the evolution of Zeff and Ti profiles in the plasma center strongly suggests that there is a positive relation between Zeff and Ti.


Keywords

Zeff measurement, bremsstrahlung, EUV spectroscopy, high-Ti, carbon pellet

DOI: 10.1585/pfr.10.3402036


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This paper may be cited as follows:

Xianli HUANG, Shigeru MORITA, Tetsutarou OISHI, Motoshi GOTO and Hongming ZHANG, Plasma Fusion Res. 10, 3402036 (2015).