Scale lengths of inter-ELM fluctuations in the pedestal of ASDEX Upgrade

被引：5

作者：

Kurzan, B. ^{[1
]}

Fuchs, C. ^{[1
]}

Scarabosio, A. ^{[1
]}

Scott, B. D. ^{[1
]}

机构：

[1] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2009年 / 51卷 / 06期

关键词：

ALCATOR C-MOD; DIVERTOR TOKAMAK; TURBULENCE; EDGE; PLASMAS; TRANSPORT; COMPUTATION;

D O I：

10.1088/0741-3335/51/6/065009

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：

Fluctuations of electron density and temperature in the hot pedestal are investigated in-between type-I edge localized modes (ELMs) by high resolution, high precision Thomson scattering. The observed fluctuations of electron density and temperature are correlated and in phase. The amplitudes of these fluctuations become observable above a line-averaged electron density of about 4 x 10(19) m(-3). The heat transport in the pedestal is investigated by analysing the heat diffusivity. The experimentally found variations in the relative fluctuation amplitudes of electron density and temperature and of the heat diffusivity can be explained by different scale lengths of the underlying turbulence. The large fluctuations of electron density and temperature scale with a hybrid scale between ideal and resistive magneto-hydrodynamics, while the thermal transport occurs on the smallest scale lengths of the turbulence.

引用

页数：17

共 22 条

[1]

Braginskii S. I., 1965, Rev. Plasma Phys, V1, P205

[2] Experiments and simulation of edge turbulence and filaments in MAST [J].

Dudson, B. D. ;

Ben Ayed, N. ;

Kirk, A. ;

Wilson, H. R. ;

Counsell, G. ;

Xu, X. ;

Umansky, M. ;

Snyder, P. B. ;

LLoyd, B. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2008, 50 (12)

[3] Density limits in toroidal plasmas [J].

Greenwald, M .

PLASMA PHYSICS AND CONTROLLED FUSION, 2002, 44 (08) :R27-R80

[4] 3-DIMENSIONAL FLUID SIMULATIONS OF THE NONLINEAR DRIFT-RESISTIVE BALLOONING MODES IN TOKAMAK EDGE PLASMAS [J].

GUZDAR, PN ;

DRAKE, JF ;

MCCARTHY, D ;

HASSAM, AB ;

LIU, CS .

PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1993, 5 (10) :3712-3727

[5] In vessel pressure measurement in nuclear fusion experiments with ASDEX gauges [J].

Haas, G ;

Bosch, HS .

VACUUM, 1998, 51 (01) :39-46

[6] Thomson scattering analysis of large scale fluctuations in the ASDEX Upgrade edge [J].

Kurzan, B. ;

Horton, L. D. ;

Murmann, H. ;

Neuhauser, J. ;

Suttrop, W. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2007, 49 (06) :825-844

[7] Signal processing of Thomson scattering data in a noisy environment in ASDEX Upgrade [J].

Kurzan, B ;

Jakobi, M ;

Murmann, H .

PLASMA PHYSICS AND CONTROLLED FUSION, 2004, 46 (01) :299-317

[8] Measurement and scaling of the radial correlation lengths of turbulence at the plasma edge of ASDEX Upgrade [J].

Kurzan, B ;

Hempel, SD ;

Holzhauer, E ;

Scott, B ;

Serra, F ;

Suttrop, W ;

Zeiler, A .

PLASMA PHYSICS AND CONTROLLED FUSION, 2000, 42 (03) :237-253

[9] Evidence for electromagnetic fluid drift turbulence controlling the edge plasma state in the Alcator C-Mod tokamak [J].

LaBombard, B ;

Hughes, JW ;

Mossessian, D ;

Greenwald, M ;

Lipschultz, B ;

Terry, JL .

NUCLEAR FUSION, 2005, 45 (12) :1658-1675

[10] Cross-field plasma transport and main-chamber recycling in diverted plasmas on Alcator C-Mod [J].

LaBombard, B ;

Umansky, MV ;

Boivin, RL ;

Goetz, JA ;

Hughes, J ;

Lipschultz, B ;

Mossessian, D ;

Pitcher, CS ;

Terry, JL .

NUCLEAR FUSION, 2000, 40 (12) :2041-2060

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