JET scrape-off-layer ionization at lower hybrid wave launching

被引：7
|
作者：
Petrzilka, V. [1 ]
Mailloux, J. [2 ]
Ongena, J. [3 ]
Corrigan, G. [2 ]
Fuchs, V. [1 ]
Goniche, M. [4 ]
Parail, V. [2 ]
Belo, P. [5 ]
Ekedahl, A. [4 ]
Jacquet, P. [2 ]
Mayoral, M-L [2 ]
Silva, C. [5 ]
Stamp, M. [2 ]
机构：
[1] Assoc EURATOM IPP CR, Prague 18221 8, Czech Republic
[2] Assoc EURATOM CCFE, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[3] Royal Mil Acad, Assoc EURATOM Belgian State, Plasma Phys Lab, Brussels, Belgium
[4] IRFM, Assoc EURATOM CEA Cadarache, F-13108 St Paul Les Durance, France
[5] Assoc Euratom IST, Ctr Fusao Nucl, Lisbon, Portugal
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2012年 / 54卷 / 07期
关键词：
TORE-SUPRA; ELECTRONS; EDGE; POWER; DIVERTOR; GRILL;
D O I：
10.1088/0741-3335/54/7/074005
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：
We present in this paper modelling of the JET scrape-off layer ( SOL) including direct SOL ionization by launched lower hybrid (LH) waves. For that purpose, the two-dimensional fluid code EDGE2D-NIMBUS was modified in order to account for possible enhanced ionization in the SOL, due to the LH power absorbed by the electrons in a layer extending in the radial direction from the launcher. By taking the direct LH SOL ionization into account, the observed modification of the density in front of the LH antenna during a LH power and gas injection, can be explained. The JET grill private SOL limiters, acting as sinks for the particles, are also included in the model. We compare the efficiency of gas puffing from the top and the outer mid-plane for SOL density enhancement and improvement in LH coupling. The observed reduction of the temporal variation of the LH wave reflection coefficient and of measured saturated currents in the SOL during ELMs, is explained. The density depletion, by ponderomotive forces in front of the grill, is estimated.
引用
收藏
页数：11
相关论文
共 50 条
  • [21] Reduced physics model of the tokamak Scrape-Off-Layer for pulse design
    Zhang, X.
    Poli, F. M.
    Emdee, E. D.
    Podesta, M.
    NUCLEAR MATERIALS AND ENERGY, 2023, 34
  • [22] Time-dependent Kinetic Factors in ITER Scrape-Off-Layer
    Vasileska, Ivona
    Tskhakaya, David
    Kos, Leon
    29TH INTERNATIONAL CONFERENCE NUCLEAR ENERGY FOR NEW EUROPE (NENE 2020), 2020,
  • [23] Impact of a Langmuir Probe on Turbulence Measurements in the Scrape-Off-Layer of Tokamaks
    Colin, C.
    Tamain, P.
    Ghendrih, P.
    Schwander, F.
    Serre, E.
    CONTRIBUTIONS TO PLASMA PHYSICS, 2014, 54 (4-6) : 543 - 548
  • [24] Kinetic Simulations in Support of Probe Measurements of COMPASS scrape-off-layer
    Kovacic, Jernej
    Popov, Tsviatko
    Dimitrova, Miglena
    Gyergyek, Tomaz
    Cercek, Milan
    Dejarnac, Renaud
    Stockel, Jan
    Panek, Radomir
    22ND INTERNATIONAL CONFERENCE NUCLEAR ENERGY FOR NEW EUROPE, (NENE 2013), 2013,
  • [25] Helicon full-wave modeling with scrape-off-layer turbulence on the DIII-D tokamak
    Lau, Cornwall
    Brookman, Michael
    Dimits, Andris
    Dudson, Ben
    Martin, Elijah
    Pinsker, Robert I.
    Thomas, Matt
    Van Compernolle, Bart
    NUCLEAR FUSION, 2021, 61 (12)
  • [26] Absorption of lower hybrid waves in the scrape off layer of a diverted tokamak
    Wallace, G. M.
    Parker, R. R.
    Bonoli, P. T.
    Hubbard, A. E.
    Hughes, J. W.
    LaBombard, B. L.
    Meneghini, O.
    Schmidt, A. E.
    Shiraiwa, S.
    Whyte, D. G.
    Wright, J. C.
    Wukitch, S. J.
    Harvey, R. W.
    Smirnov, A. P.
    Wilson, J. R.
    PHYSICS OF PLASMAS, 2010, 17 (08)
  • [27] Density modification in the scrape-off-layer during LHW coupling at EAST
    Kong, E. H.
    Ding, B. J.
    Li, M. H.
    Li, Y. C.
    Wu, Z. G.
    Zhang, L.
    Liu, F. K.
    Shan, J. F.
    Zhang, X. J.
    Qin, C. M.
    Xu, G. S.
    Wang, H. Q.
    Gong, X. Z.
    Gan, K. F.
    Wang, M.
    Feng, J. Q.
    PLASMA PHYSICS AND CONTROLLED FUSION, 2014, 56 (07)
  • [28] Scrape-off-layer current loops and floating potential in limited tokamak plasmas
    Loizu, J.
    Morales, J. A.
    Halpern, F. D.
    Ricci, P.
    Paruta, P.
    JOURNAL OF PLASMA PHYSICS, 2017, 83 (06)
  • [29] Estimation of the scrape-off-layer width in tokamak using the electron balance equations
    Ahmed, Kamal M.
    Bekheit, A. H.
    Abd Al-Halim, M. A.
    FUSION ENGINEERING AND DESIGN, 2023, 186
  • [30] Influence of hydrogen content in tokamak scrape-off-layer on performance of lithium divertor
    Marenkov, E. D.
    Pshenov, A. A.
    NUCLEAR FUSION, 2025, 65 (01)
12345