Characterisation of the fast-ion edge resonant transport layer induced by 3D perturbative fields in the ASDEX Upgrade tokamak through full orbit simulations

被引：41

作者：

Sanchis, L. ^{[1
,2
]}

Garcia-Munoz, M. ^{[1
,2
]}

Snicker, A. ^{[3
]}

Ryan, D. A. ^{[4
]}

Zarzoso, D. ^{[5
]}

Chen, L. ^{[6
]}

Galdon-Quiroga, J. ^{[1
,2
]}

Nocente, M. ^{[7
]}

Rivero-Rodriguez, J. F. ^{[1
,2
]}

Rodriguez-Ramos, M. ^{[2
]}

Suttrop, W. ^{[8
]}

Van Zeeland, M. A. ^{[9
]}

Viezzer, E. ^{[1
,2
]}

Willensdorfer, M. ^{[8
]}

Zonca, F. ^{[10
]}

机构：

[1] Univ Seville, Dept Atom Mol & Nucl Phys, Avda Reina Mercedes, E-41012 Seville, Spain

[2] Univ Seville, CSIC, Junta Andalucia, Ctr Nacl Aceleradores, Avda Thomas A Edison 7, E-41092 Seville, Spain

[3] Aalto Univ, Dept Appl Phys, FI-00076 Aalto, Finland

[4] Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England

[5] Aix Marseille Univ, CNRS, UMR, PIIM, F-7345 Mareseille, France

[6] Zhejiang Univ, IFTS, Hangzhou 310027, Zhejiang, Peoples R China

[7] Univ Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy

[8] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

[9] Gen Atom Co, San Diego, CA 92186 USA

[10] ENEA CR Frascati, CP 65, I-00044 Frascati, Italy

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2019年 / 61卷 / 01期

关键词：

fast-ion transport; tokamak; magnetic perturbations; AUG; nonlinear resonances; ASCOT; canonical angular momentum; MAGNETIC PERTURBATIONS;

D O I：

10.1088/1361-6587/aaef61

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：

In recent experiments at the ASDEX Upgrade tokamak the existence of an Edge Resonant Transport Layer (ERTL) was revealed as the main transport mechanism responsible for the measured fast-ion losses in the presence of externally applied 3D fields. The Monte Carlo orbitfollowing code ASCOT was used to study the fast-ion transport including the plasma response calculated with MARS-F, reproducing a strong correlation of fast-ion losses with the poloidal mode spectra of the 3D fields. In this work, a description of the physics underlying the ERTL is presented by means of numerical simulations together with an analytical model and experimental measurements to validate the results. The degradation of fast-ion confinement is calculated in terms of the variation of the toroidal canonical momentum (delta P-phi). This analysis reveals resonant patterns at the plasma edge activated by 3D perturbations and emphasizes the relevance of nonlinear resonances. The impact of collisions and the radial electric field on the ERTL is analysed.

引用

页数：10

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