Nonlinear control of transport in drift wave turbulence

被引：2
作者：
Brandt, C. [1 ]
Grulke, O. [1 ,2 ]
Klinger, T. [1 ,2 ]
机构：
[1] EURATOM, MPI Plasma Phys, D-17491 Greifswald, Germany
[2] Ernst Moritz Arndt Univ Greifswald, D-17489 Greifswald, Germany
来源：
JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷
关键词：
52.25.Fi; 52.25.Xz; 52.30.Ex; 52.35.Kt; 52.35.Ra;
D O I：
10.1016/j.jnucmat.2009.01.082
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The control of the dynamics of drift waves is investigated experimentally in a linear laboratory plasma device. The control parameter is a mode selective drive of currents parallel to the magnetic field using an arrangement of eight azimuthally arranged electrodes and eight saddle coils, respectively. The driven currents resemble the intrinsic drift mode currents. Single coherent drift modes are synchronized in frequency by both control setups only if the control signal has the same mode structure and direction of phase velocity as the drift mode. The frequency range of synchronization depends nonlinearly on the amplitude of the driven Current. In drift wave turbulence the turbulent fluctuations are synchronized to a single coherent drift mode to the expense of the energy of the broadband turbulent fluctuations. As a result the phase shift of density and potential fluctuations decreases considerably, thereby reducing the cross-field transport. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：380 / 383
页数：4
相关论文
共 8 条
[1]   Interchange turbulence in the TCV scrape-off layer [J].
Garcia, OE ;
Horacek, J ;
Pitts, RA ;
Nielsen, AH ;
Fundamenski, W ;
Graves, JP ;
Naulin, V ;
Rasmussen, JJ .
PLASMA PHYSICS AND CONTROLLED FUSION, 2006, 48 (01) :L1-L10
[2]   Tokamak turbulence computations on closed and open magnetic flux surfaces [J].
Ribeiro, TT ;
Scott, B .
PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (10) :1657-1679
[3]   Drift waves in a high-density cylindrical helicon discharge -: art. no. 042103 [J].
Schröder, C ;
Grulke, O ;
Klinger, T ;
Naulin, V .
PHYSICS OF PLASMAS, 2005, 12 (04) :1-6
[4]   Spatial mode structures of electrostatic drift waves in a collisional cylindrical helicon plasma [J].
Schröder, C ;
Grulke, O ;
Klinger, T ;
Naulin, V .
PHYSICS OF PLASMAS, 2004, 11 (09) :4249-4253
[5]   Mode selective control of drift wave turbulence [J].
Schröder, C ;
Klinger, T ;
Block, D ;
Piel, A ;
Bonhomme, G ;
Naulin, V .
PHYSICAL REVIEW LETTERS, 2001, 86 (25) :5711-5714
[6]   Basic studies of fluctuations, transport and their control [J].
Sen, AK ;
Chiu, JS ;
Chen, J ;
Tham, P .
PLASMA PHYSICS AND CONTROLLED FUSION, 1997, 39 (5A) :333-340
[7]   FEEDBACK-CONTROL AND STABILIZATION EXPERIMENTS ON THE TEXAS EXPERIMENTAL TOKAMAK (TEXT) [J].
UCKAN, T ;
RICHARDS, B ;
WOOTTON, AJ ;
BENGTSON, RD ;
BRAVENEC, R ;
CARRERAS, BA ;
LI, GX ;
HURWITZ, P ;
PHILLIPS, PE ;
ROWAN, WL ;
TSUI, HYW ;
UGLUM, JR ;
WEN, Y ;
WINSLOW, D .
JOURNAL OF NUCLEAR MATERIALS, 1995, 220 :663-667
[8]   Propagating structures in drift-wave turbulence [J].
Windisch, T ;
Grulke, O ;
Klinger, T .
PHYSICA SCRIPTA, 2006, T122 :15-18
1