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
收藏
页数：17
相关论文
共 50 条
  • [21] Latest investigations on fluctuations, ELM filaments and turbulent transport in the SOL of ASDEX Upgrade
    Mueller, H. W.
    Adamek, J.
    Cavazzana, R.
    Conway, G. D.
    Fuchs, C.
    Gunn, J. P.
    Herrmann, A.
    Horacek, J.
    Ionita, C.
    Kallenbach, A.
    Kocan, M.
    Maraschek, M.
    Maszl, C.
    Mehlmann, F.
    Nold, B.
    Peterka, M.
    Rohde, V.
    Schweinzer, J.
    Schrittwieser, R.
    Vianello, N.
    Wolfrum, E.
    Zuin, M.
    NUCLEAR FUSION, 2011, 51 (07)
  • [22] Overview of recent pedestal studies at ASDEX Upgrade
    Wolfrum, E.
    Viezzer, E.
    Burckhart, A.
    Dunne, M. G.
    Schneider, P. A.
    Willensdorfer, M.
    Fable, E.
    Fischer, R.
    Hatch, D.
    Jenko, F.
    Kurzan, B.
    Manz, P.
    Rathgeber, S. K.
    NUCLEAR FUSION, 2015, 55 (05)
  • [23] Parameter dependence of ELM loss reduction by magnetic perturbations at low pedestal density and collisionality in ASDEX upgrade
    Leuthold, N.
    Suttrop, W.
    Fischer, R.
    Kappatou, A.
    Kirk, A.
    McDermott, R.
    Mlynek, A.
    Valovic, M.
    Willensdorfer, M.
    PLASMA PHYSICS AND CONTROLLED FUSION, 2017, 59 (05)
  • [24] New understanding of inter-ELM pedestal turbulence, transport, and gradient behavior in the DIII-D tokamak
    Barada, K.
    Rhodes, T. L.
    Haskey, S. R.
    Groebner, R.
    Diallo, A.
    Banerjee, S.
    Zeng, L.
    Yan, Z.
    Chen, J.
    Laggner, F.
    Wang, G.
    NUCLEAR FUSION, 2021, 61 (12)
  • [25] Effects of inter-ELM quasi-coherent modes on the dynamics of pedestal turbulence on HL-2A tokamak
    Wen, J.
    Shi, Z. B.
    Zhong, W. L.
    Zou, X. L.
    Jiang, M.
    Ke, R.
    Xu, J. Q.
    Chen, W.
    Yang, Z. C.
    Liang, A. S.
    Yu, X.
    Wu, N.
    He, X. X.
    Shi, P. W.
    Xiao, G. L.
    Tong, R. H.
    Yuan, B. D.
    Zhu, Y. R.
    Zhang, Y. P.
    Gao, J. M.
    Han, M. K.
    Dong, J. Q.
    Shen, Y.
    Ji, X. Q.
    NUCLEAR FUSION, 2024, 64 (07)
  • [26] Complex structure of turbulence across the ASDEX Upgrade pedestal
    Leppin, L. A.
    Goerler, T.
    Cavedon, M.
    Dunne, M. G.
    Wolfrum, E.
    Jenko, F.
    JOURNAL OF PLASMA PHYSICS, 2023, 89 (06)
  • [27] Pedestal properties of negative triangularity discharges in ASDEX Upgrade
    Vanovac, B.
    Dunne, M.
    Puetterich, T.
    Happel, T.
    Hobirk, J.
    Silvagni, D.
    Faitsch, M.
    Lee, K.
    Conway, G. D.
    Bielajew, R.
    Yoo, C.
    White, A. E.
    Bernert, M.
    David, P.
    Fischer, R.
    Stieglitz, D.
    PLASMA PHYSICS AND CONTROLLED FUSION, 2024, 66 (11)
  • [28] Thomson scattering analysis of large scale fluctuations in the ASDEX Upgrade edge
    Kurzan, B.
    Horton, L. D.
    Murmann, H.
    Neuhauser, J.
    Suttrop, W.
    PLASMA PHYSICS AND CONTROLLED FUSION, 2007, 49 (06) : 825 - 844
  • [29] Developments towards an ELM-free pedestal radiative cooling scenario using noble gas seeding in ASDEX Upgrade
    Kallenbach, A.
    Bernert, M.
    David, P.
    Dunne, M. G.
    Dux, R.
    Fable, E.
    Fischer, R.
    Gil, L.
    Goerler, T.
    Janky, F.
    McDermott, R. M.
    Suttrop, W.
    Tardini, G.
    Wischmeier, M.
    NUCLEAR FUSION, 2021, 61 (01)
  • [30] I-mode pedestal relaxation events at ASDEX Upgrade
    Silvagni, D.
    Eich, T.
    Happel, T.
    Harrer, G. F.
    Griener, M.
    Dunne, M.
    Cavedon, M.
    Faitsch, M.
    Gil, L.
    Nille, D.
    Tal, B.
    Fischer, R.
    Stroth, U.
    Brida, D.
    David, P.
    Manz, P.
    Viezzer, E.
    NUCLEAR FUSION, 2020, 60 (12)
12345