A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes

被引：35

作者：

Terranova, D. ^{[1
]}

Bonfiglio, D. ^{[1
]}

Boozer, A. H. ^{[2
]}

Cooper, A. W. ^{[3
]}

Gobbin, M. ^{[1
]}

Hirshman, S. P. ^{[5
]}

Lorenzini, R. ^{[1
]}

Marrelli, L. ^{[1
]}

Martines, E. ^{[1
]}

Momo, B. ^{[1
]}

Pomphrey, N. ^{[6
]}

Predebon, I. ^{[1
]}

Sanchez, R. ^{[5
]}

Spizzo, G. ^{[1
]}

Agostini, M. ^{[1
]}

Alfier, A. ^{[1
]}

Apolloni, L. ^{[1
]}

Auriemma, F. ^{[1
]}

Baruzzo, M. ^{[1
]}

Bolzonella, T. ^{[1
]}

Bonomo, F. ^{[1
]}

Brombin, M. ^{[1
]}

Canton, A. ^{[1
]}

Cappello, S. ^{[1
]}

Carraro, L. ^{[1
]}

Cavazzana, R. ^{[1
]}

Dal Bello, S. ^{[1
]}

Delogu, R. ^{[1
]}

De Masi, G. ^{[1
]}

Drevlak, M. ^{[4
]}

Fassina, A. ^{[1
]}

Ferro, A. ^{[1
]}

Franz, P. ^{[1
]}

Gaio, E. ^{[1
]}

Gazza, E. ^{[1
]}

Giudicotti, L. ^{[1
]}

Grando, L. ^{[1
]}

Guo, S. C. ^{[1
]}

Innocente, P. ^{[1
]}

Lopez-Bruna, D. ^{[6
]}

Manduchi, G. ^{[1
]}

Marchiori, G. ^{[1
]}

Martin, P. ^{[1
]}

Martini, S. ^{[1
]}

Menmuir, S. ^{[1
]}

Munaretto, S. ^{[1
]}

Novello, L. ^{[1
]}

Paccagnella, R. ^{[1
]}

Pasqualotto, R. ^{[1
]}

Pereverzev, G. V. ^{[7
]}

机构：

[1] Assoc EURATOM ENEA Fus, Consorzio RFX, Padua, Italy

[2] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA

[3] Ecole Polytech Fed Lausanne, Assoc Euratom Confederat Suisse, Ctr Rech Phys Plasmas, CH-1015 Lausanne, Switzerland

[4] Max Planck Inst Plasma Phys, Greifswald, Germany

[5] ORNL Fus Energy Div, Oak Ridge, TN USA

[6] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[7] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2010年 / 52卷 / 12期

关键词：

REVERSED-FIELD PINCH; TOROIDAL PLASMAS; COEFFICIENTS; CONFINEMENT; EVOLUTION;

D O I：

10.1088/0741-3335/52/12/124023

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The full three-dimensional (3D) approach is now becoming an important issue for all magnetic confinement configurations. It is a necessary condition for the stellarator but also the tokamak and the reversed field pinch (RFP) now cannot be completely described in an axisymmetric framework. For the RFP the observation of self-sustained helical configurations with improved plasma performances require a better description in order to assess a new view on this configuration. In this new framework plasma configuration studies for RFX-mod have been considered both with tools developed for the RFP as well as considering codes originally developed for the stellarator and adapted to the RFP. These helical states are reached through a transition to a very low/reversed shear configuration leading to internal electron transport barriers. These states are interrupted by MHD reconnection events and the large T-e gradients at the barriers indicate that both current and pressure driven modes are to be considered. Furthermore the typically flat T-e profiles in the helical core have raised the issue of the role of electrostatic and electromagnetic turbulence in these reduced chaos regions, so that a stability analysis in the correct 3D geometry is required to address an optimization of the plasma setup. In this view the VMEC code proved to be an effective way to obtain helical equilibria to be studied in terms of stability and transport with a suite of well tested codes. In this work, the equilibrium reconstruction technique as well as the experimental evidence of 3D effects and their first interpretation in terms of stability and transport are presented using both RFP and stellarator tools.

引用

页数：15

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