Journal ArticleDOI
Ion temperature measurements in JT-60 plasmas by active beam scattering
Kenji Tobita,Y. Kusama,M. Nemoto,Hiroshi Takeuchi,H. Yoshida,Akira Sakasai,Hirotaka Kubo,Y. Koide,Tatsuo Sugie,T. Itoh,Y. Tsukahara,N. Akaoka +11 more
TLDR
In this paper, active beam scattering method was applied to ion temperature measurements in JT-60 plasmas and the ion temperature found was in reasonable agreement with that obtained from Doppler broadening of the Ti XXI and Ti XXII resonance lines in the temperature range of 1.5 to 10 keV.Abstract:
The active beam scattering method was applied to ion temperature measurements in JT-60 plasmas. The ion temperature found was in reasonable agreement with that obtained from Doppler broadening of the Ti XXI and Ti XXII resonance lines in the temperature range of 1.5 to 10 keV. With the help of the scattering system, the central ion temperature of JT-60 plasmas during 40 keV and 70-75 keV NBI heating was measured. Higher ion temperature was obtained during 70 to 75 keV than during 40 keV NBI heating. These data and a possible explanation are presented. A numerical simulation of this diagnostic indicates that the ion temperature as deduced from the diagnostic is almost equal to the bulk temperature when the ratio of high energy ion component to the total ion stored energy is less than 0.3.read more
Citations
More filters
Journal ArticleDOI
Bootstrap current during perpendicular neutral injection in JT-60
TL;DR: In this paper, the experimental resistive loop voltages are compared with the calculations, using the neoclassical resistivity, with and without the bootstrap current, and the Spitzer resistivity for a wide range of plasma current.
Journal ArticleDOI
Rutherford scattering diagnostic for the Madison symmetric torus reversed-field pinch
J. C. Reardon,G. Fiksel,Cary Forest,A. F. Abdrashitov,Vladimir I. Davydenko,A. A. Ivanov,S. A. Korepanov,S. V. Murachtin,G. I. Shulzhenko +8 more
TL;DR: In this article, Abdrashitov et al. used the Rutherford scattering (RS) technique to measure the bulk majority ion temperature on the Madison symmetric torus (MST).
Journal ArticleDOI
Ion sources for fusion plasma diagnostics
Mamiko Sasao,Kenneth A. Connor,Katsumi Ida,Harukazu Iguchi,A. A. Ivanov,Masaki Nishiura,Daniel Thomas,Motoi Wada,Mikiro Yoshinuma +8 more
TL;DR: In this article, a heavy ion beam probe (HIBP) made from alkali metal ions is injected directly without neutralization to measure plasma potential and density, as well as their fluctuations.
Journal ArticleDOI
Measurements of neutral beam stopping for hydrogen and helium in the JT-60 plasma
Kenji Tobita,T Itoh,Akira Sakasai,Yoshinori Kusama,Y Ohara,Y Tsukahara,M. Nemoto,Yasunori Kawano,H Hubo,Hiroshi Takeuchi,Tatsuo Sugie +10 more
TL;DR: In this paper, the authors measured the Shine-Through for hydrogen and helium beams in a plasma and found that the beam stopping increment was about 0.2 at ne=(3.1-5.0) cm-3 and Zeff=1.6-2.5.
Journal ArticleDOI
Chapter 8: Particle Diagnostics
TL;DR: In this paper, three techniques for particle diagnostics of magnetically confined fusion plasmas are reviewed: charge exchange neutral particle analysis, Rutherford scattering, and heavy ion beam probes.
References
More filters
Journal ArticleDOI
Experimentally inferred ion thermal diffusivity profiles in the Doublet III tokamak: Comparison with neoclassical theory
R. J. Groebner,W. Pfeiffer,F. Blau,K. H. Burrell,E. Fairbanks,R. P. Seraydarian,H.E. St. John,R. E. Stockdale +7 more
TL;DR: In this paper, a series of 18 neutral-beam-heated discharges in the Doublet III tokamak were examined and the experimentally inferred values of the ion thermal diffusivity predicted by neoclassical theory.
Journal ArticleDOI
Spatially Resolved Measurements of Fully Ionized Low- Z Impurities in the PDX Tokamak
R. J. Fonck,M. Finkenthal,Robert James Goldston,D. L. Herndon,R. A. Hulse,R. Kaita,D. D. Meyerhofer +6 more
TL;DR: In this article, the distribution of fully ionized oxygen and carbon in PDX tokamak plasma is reported, and the C/sup 6 +/ and O/sup 8 +/ ions are observed out to radii beyond the limiter.
Journal Article
Temperature measurement in a low-density medium with an atomic beam.
Journal ArticleDOI
Charge exchange neutral particle mass and energy analyzer for the JT‐60 tokamak
K. Hayashi,K. Hashimoto,H. Yamato,Hiroshi Takeuchi,Yukitoshi Miura,Takeo Nishitani,Makoto Shiho,H. Maeda +7 more
TL;DR: In this paper, a charge exchange neutral particle mass and energy analyzer for JT•60 is described, which analyzes H, D, and He simultaneously up to a maximum energy of 110 keV.
Journal ArticleDOI
Effect of target gas temperature on the scattering cross section
TL;DR: In this paper, a general expression for the observed differential scattering cross section in the laboratory frame in terms of the differential cross-section in the center-of-mass frame for the general case of arbitrary initial motion of the target is given for hard-sphere scattering.