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Urso, L.*; Zohm, H.*; Fischer, R.*; Isayama, Akihiko; Kamada, Yutaka; ASDEX Upgrade Team; JT-60 Team
Europhysics Conference Abstracts (CD-ROM), 32D, 4 Pages, 2008/00
no abstracts in English
Oikawa, Toshihiro; Polevoi, A. R.*; Bonoli, P. T.*; Campbell, D. J.*; Henderson, M.*
no journal, ,
We have been developing physics models and computational codes for heating and current drive of NB, EC and LH. A NB code has been developed in JAEA and on the Monte-Carlo scheme with employing the Suzuki model for the ionization process, which are based on the most recent atomic data. An EC code, also developed in JAEA, is based on the ray-tracing and quasi-linear Fokker-Planck equation. A LH code, which was introduced from MIT, employs a 2D equivalent collision operator in the 1D Fokker-Planck code. Then the LH code shows a good agreement with fully 2D codes. A design changes of the NB and its injection port in 2007 made the range of the NB injection angle narrower than in the EDA2001, then the NBCD profile shifts inward by a minor radius of 
0.05. The LH spectrum has to have a relatively high value of 
because of the accessibility condition. With this spectrum, LHCD is 0.83MA in the reference steady-state scenario for a 20MW injection from an equatorial port.
Ide, Shunsuke; JT-60 Team
no journal, ,
Development of high normalized beta (
) and high bootstrap current fraction (
) advanced tokamak (AT) plasma has been pursued in JT-60U. In the AT development, increasing the key parameters and extending the sustaining duration are both important. In recent JT-60U experiments, 
4.2 and 
100% have been achieved in short time scale (energy confinement time) and sustainment of =2.3 for 23 s and =70% for 8 s in long time scale (several to several tens of current diffusion time) have been demonstrated. These achievements have been supported and stimulated progress in understanding of physics issue: effect of plasma rotation on resistive wall mode, energy confinement, effect of localized current drive on neo-classical tearing mode, off-axis current drive by NBI and so forth. Based on the physics understanding, integrated active control has been developed. These results will contribute establishing physics operation in JT-60SA. In this presentation, recent progress in AT development in JT-60U will be discussed with emphasis on their impact for JT-60SA.
