A data acquisition system for real-time magnetic equilibrium reconstruction on ASDEX Upgrade and its application to NTM stabilization experiments

被引：23

作者：

Giannone, L. ^{[1
]}

Reich, M. ^{[1
]}

Maraschek, M. ^{[1
]}

Poli, E. ^{[1
]}

Rapson, C. ^{[1
]}

Barrera, L. ^{[1
]}

McDermott, R. ^{[1
]}

Mlynek, A. ^{[1
]}

Ruan, Q. ^{[2
]}

Treutterer, W. ^{[1
]}

Wenzel, L. ^{[2
]}

Bock, A. ^{[1
]}

Conway, G. ^{[1
]}

Fischer, R. ^{[1
]}

Fuchs, J. C. ^{[1
]}

Lackner, K. ^{[1
]}

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

Preuss, R. ^{[1
]}

Rampp, M. ^{[4
,5
]}

Schuhbeck, K. H. ^{[1
]}

Stober, J. ^{[1
]}

Zohm, H. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

[2] Natl Instruments, Austin, TX 78759 USA

[3] Univ Coll Cork, Assoc EURATOM DCU, Dept Phys, Cork, Ireland

[4] Comp Ctr RZG, Max Planck Soc, D-85748 Garching, Germany

[5] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

来源：

FUSION ENGINEERING AND DESIGN | 2013年 / 88卷 / 12期

关键词：

Real-time tokamak equilibrium; MSE; Neoclassical tearing mode; Feedback control; ASDEX Upgrade; Magnetic probes; NEOCLASSICAL TEARING MODES; RADIAL ELECTRIC-FIELD; DIII-D; POISSONS-EQUATION; TOKAMAK PLASMAS; FEEDBACK-CONTROL; CURRENT PROFILES; MHD EQUILIBRIUM; JT-60U TOKAMAK; ACTIVE CONTROL;

D O I：

10.1016/j.fusengdes.2013.10.008

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The pre-emptive stabilization of a neoclassical tearing mode, NTM, requires the calculation of the tokamak magnetic equilibrium in real-time. A launcher mirror is positioned to deposit electron cyclotron current drive on the rational surface where the NTM should appear. A real-time Grad-Shafranov solver using constraints from magnetic probe, flux loop and Motional Stark Effect measurements has been developed to locate these rational surfaces and deliver this information to the mirror controller in real-time. A novel algorithm significantly reduces the number of operations required in the first and second step of the solver. Contour integrals are carried out to calculate the q profile as a function of normalized radius and the rational surfaces are found by spline interpolation. A cycle time of 0.6 ins for calculating two tokamak equilibria in parallel using four current basis functions with magnetic constraints only and using six current basis functions with magnetic and MSE constraints has been achieved. Using these tools, pre-emptive stabilization of a m/n =3/2 NTM mode in ASDEX Upgrade could be demonstrated. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：3299 / 3311

页数：13

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