Empirical scaling of sawtooth period for onset of neoclassical tearing modes

被引：55

作者：

Chapman, I. T. ^{[1
]}

Buttery, R. J. ^{[2
]}

Coda, S. ^{[3
]}

Gerhardt, S. ^{[4
]}

Graves, J. P. ^{[3
]}

Howell, D. F. ^{[1
]}

Isayama, A. ^{[5
]}

La Haye, R. J.

Liu, Y. ^{[6
]}

Maget, P. ^{[7
]}

Maraschek, M. ^{[8
]}

Sabbagh, S. ^{[9
]}

Sauter, O. ^{[3
]}

机构：

[1] EURATOM, CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] Gen Atom, San Diego, CA USA

[3] Ecole Polytech Fed Lausanne, CRPP, Assoc EURATOM Confederat Suisse, CH-1015 Lausanne, Switzerland

[4] Princeton Univ, PPPL, Princeton, NJ 08543 USA

[5] Japan Atom Energy Agcy, Naka Ku, Naka, Ibaraki 3110193, Japan

[6] SW Inst Phys, Chengdu, Peoples R China

[7] IRFM, CEA, F-13108 St Paul Les Durance, France

[8] EURATOM Ass, MPI Plasmaphys, D-85748 Garching, Germany

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

来源：

NUCLEAR FUSION | 2010年 / 50卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

MAGNETIC ISLANDS; NONLINEAR DYNAMICS; MHD ACTIVITY; BETA; DISCHARGES; CURVATURE;

D O I：

10.1088/0029-5515/50/10/102001

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：

Experimental observations from a range of tokamaks show that neoclassical tearing modes (NTMs) are triggered at lower plasma pressure when the sawtooth period is longer. A multi-machine database from nine tokamaks has been established in order to extrapolate the acceptable sawtooth period to avoid triggering NTMs in ITER. It is found that the governing physics is best compared between machines by normalizing the sawtooth period to the resistive diffusion time and using the normalized beta as a measure of performance and global stability. A multi-parameter power scaling is determined from regression analysis of the complete dataset and compared favourably with experimental data from a number of machines.

引用

页数：7

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