Simulation modeling of fully non-inductive buildup scenario in high bootstrap current tokamaks without center solenoids

Y. Nakamura, H. Tsutsui, K. Tobita, N. Takei, Y. Takase, T. Ozeki, S. C. Jardin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Using the TSC with L-mode based, improved core confinement model, i.e. CDBM [4], consistent simulations of fully non-inductive buildup were carried out from the practical control aspects of the compact, CS-less tokamak. The integrated scenario was shown to meet the control and physics requirements set by plasma shaping, available NB-heating power, reasonable HH factor and allowable Greenwald density limit. In a high power NB-heating, a self-organized, spatiotemporal oscillation of the plasma pressure and current was predicted to occur, while no oscillation at lower power NB-heating. The oscillation mechanism was clarified that in the full non-inductive CD plasmas, tiny, toroidal electric field plays the key role in the ITB-formation. Furthermore, a new challenging technique of the external ITB-control via tiny, toroidal electric field was proposed for noninductive driven, advanced operation. The strong ITB-structure may affect the NB and CD deposition profiles, which are assumed fixed in the present study. The further modeling of the interplay between the ITB-structure and the deposition profile is left for future study. Property of the spatioemporal oscillation should should depend on the ELM activity that limits the pedestal pressure, and this is left for future study.

Original languageEnglish
Title of host publication32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
Pages998-1001
Number of pages4
Publication statusPublished - 2005 Dec 1
Externally publishedYes
Event32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets - Tarragona, Spain
Duration: 2005 Jun 272005 Jul 1

Publication series

Name32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
Volume2

Other

Other32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets
CountrySpain
CityTarragona
Period05/6/2705/7/1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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