Density limit studies in the tokamak and the reversed-field pinch

被引：15

作者：

Spizzo, G. ^{[1
]}

Pucella, G. ^{[2
]}

Tudisco, O. ^{[2
]}

Zuin, M. ^{[1
]}

Agostini, M. ^{[1
]}

Alessi, E. ^{[3
]}

Auriemma, F. ^{[1
]}

Bin, W. ^{[3
]}

Buratti, P. ^{[2
]}

Carraro, L. ^{[1
]}

Cavazzana, R. ^{[1
]}

Ciaccio, G. ^{[1
]}

De Masi, G. ^{[1
]}

Esposito, B. ^{[2
]}

Galperti, C. ^{[3
]}

Garavaglia, S. ^{[3
]}

Granucci, G. ^{[3
]}

Marinucci, M. ^{[2
]}

Marrelli, L. ^{[1
]}

Martines, E. ^{[1
]}

Mazzotta, C. ^{[2
]}

Minelli, D. ^{[3
]}

Moro, A. ^{[3
]}

Puiatti, M. E. ^{[1
]}

Scarin, P. ^{[1
]}

Sozzi, C. ^{[3
]}

Spolaore, M. ^{[1
]}

Schmitz, O. ^{[4
]}

Vianello, N. ^{[1
]}

White, R. B. ^{[5
]}

机构：

[1] Consorzio RFX, Padua, Italy

[2] ENEA, Ctr Ric Frascati, Rome, Italy

[3] CNR, IFP, I-20125 Milan, Italy

[4] Univ Wisconsin, Dept Engn Phys, Madison, WI USA

[5] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

NUCLEAR FUSION | 2015年 / 55卷 / 04期

关键词：

theory; design; and computerized simulation; particle orbits; two-fluid and multi-fluid plasmas; particle orbit and trajectory; plasma-material interactions; boundary layer effects; RADIAL ELECTRIC-FIELD; PARTICLE-TRANSPORT; PLASMA; CONFINEMENT; TURBULENCE;

D O I：

10.1088/0029-5515/55/4/043007

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 ITER scenarios and the project of DEMO involve stable operation above the Greenwald density, which justifies efforts to understand and overcome the density limit, this last observed as a disruptive termination of tokamak discharges and a thermal crash (with no disruption) of stellarator and reversed-field pinch (RFP) ones. Both in the tokamak and the RFP, new findings show that the high density limit is not governed by a unique, theoretically well-determined physical phenomenon, but by a combination of complex mechanisms involving two-fluid effects, electrostatic plasma response to magnetic islands and plasma-wall interaction. In this paper we will show new evidence challenging the traditional picture of the 'Greenwald limit', in particular with reference to the role of thermal instabilities and the edge radial electric field Er in the development of this limit.

引用

页数：10

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