Multimachine Data-Based Prediction of High-Frequency Sensor Signal Noise for Resistive Wall Mode Control in ITER

被引：5

作者：

Liu, Yueqiang ^{[1
,2
,3
]}

Sabbagh, S. A. ^{[4
]}

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

Gerasimov, S. ^{[1
]}

Gribov, Y. ^{[5
]}

Hender, T. C. ^{[1
]}

Igochine, V. ^{[6
]}

Maraschek, M. ^{[6
]}

Matsunaga, G. ^{[7
]}

Okabayashi, M. ^{[8
]}

Strait, E. J. ^{[9
]}

机构：

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

[2] Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China

[3] Chalmers, Dept Earth & Space Sci, SE-41296 Gothenburg, Sweden

[4] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[5] ITER Org, Route Vinon Verdon,CS90046, F-13067 St Paul Les Durance, France

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

[7] Japan Atom Energy Agcy, 801-1 Mukouyama, Naka, Ibaraki 3110193, Japan

[8] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA

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

来源：

FUSION SCIENCE AND TECHNOLOGY | 2016年 / 70卷 / 03期

关键词：

Sensor noise; resistive wall mode; DIII-D TOKAMAK; FEEDBACK STABILIZATION; PLASMA ROTATION; ACTIVE FEEDBACK; EXTERNAL-MODES;

D O I：

10.13182/FST15-207

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 high-frequency noise measured by magnetic sensors, at levels above the typical frequency of resistive wall modes, is analyzed across a range of present tokamak devices including DIII-D, JET, MAST, ASDEX Upgrade, JT-60U, and NSTX. A high-pass filter enables identification of the noise component with Gaussian-like statistics that shares certain common characteristics in all devices considered. A conservative prediction is made for ITER plasma operation of the high-frequency noise component of the sensor signals, to be used for resistive wall mode feedback stabilization, based on the multimachine database. The predicted root-mean-square n = 1 (n is the toroidal mode number) noise level is 10(4) to 10(5) G/s for the voltage signal, and 0.1 to 1 G for the perturbed magnetic field signal. The lower cutoff frequency of the Gaussian pickup noise scales linearly with the sampling frequency, with a scaling coefficient of about 0.1. These basic noise characteristics should be useful for the modeling-based design of the feedback control system for the resistive wall mode in ITER.

引用

页码：387 / 405

页数：19

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