Tungsten melt layer motion and splashing on castellated tungsten surfaces at the tokamak TEXTOR

被引：56

作者：

Coenen, J. W. ^{[1
]}

Bazylev, B. ^{[3
]}

Brezinsek, S. ^{[1
]}

Philipps, V. ^{[1
]}

Hirai, T. ^{[2
]}

Kreter, A. ^{[1
]}

Linke, J. ^{[1
]}

Sergienko, G. ^{[1
]}

Pospieszczyk, A. ^{[1
]}

Tanabe, T. ^{[4
]}

Ueda, Y. ^{[5
]}

Samm, U. ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Energy Res Plasma Phys, EURATOM Assoc, D-52425 Julich, Germany

[2] ITER Org, F-13108 St Paul Les Durance, France

[3] Forschungszentrum Karlsruhe, Inst Hochleistungsimpuls & Mikrowellentech, Assoc Euratom FZK, D-76021 Karlsruhe, Germany

[4] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Higashi Ku, Fukuoka 8128581, Japan

[5] Osaka Univ, Grad Sch Engn, Osaka 5650871, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2011年 / 415卷 / 01期

关键词：

HEAT LOADS; ITER; DIAGNOSTICS;

D O I：

10.1016/j.jnucmat.2010.09.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dedicated melt experiments of castellated tungsten (W) surfaces under high heat-loads were carried out in TEXTOR. Several 2 mm thick tungsten plates were used in single and multiple exposure to steady state heat loads of similar to 20 MW/m(2) up to 70 MW/m(2). The evolution of the melt layer, its motion under tokamak conditions as well as melt ejection are shown. The motion is dominated by the Lorentz-force, driven via the thermionic emission current of the heated W-plate and the toroidal magnetic field while plasma pressure can be neglected under TEXTOR conditions. In theses experiments no significant material losses are observed (<100 mu g), while melt layer ejection in form of mm sized droplets is evident. The castellated structure can hinder the motion of thin melt while thick layers and multiple exposures lead to filling of gaps. Power-handling capabilities are significantly influenced by the changes in surface topology. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S78 / S82

页数：5

共 28 条

[1] Analysis of tungsten melt-layer motion and splashing under tokamak conditions at TEXTOR
Coenen, J. W.
Philipps, V.
Brezinsek, S.
Bazylev, B.
Kreter, A.
Hirai, T.
Laengner, M.
Tanabe, T.
Ueda, Y.
Samm, U.
NUCLEAR FUSION, 2011, 51 (08)
[2] MODELING OF TUNGSTEN MELT LAYER EROSION CAUSED BY JxB FORCE AT TEXTOR WITH THE CODE MEMOS
Bazylev, B.
Coenen, J. W.
PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY, 2013, (01): : 3 - 7
[3] Performance and erosion of a tungsten brush limiter exposed at the TEXTOR tokamak
Hirai, T
Philipps, V
Huber, A
Sergienko, G
Linke, J
Wakui, T
Tanabe, T
Rubel, M
Wada, M
Ohgo, T
Pospieszczyk, A
Ohya, K
Barabash, V
JOURNAL OF NUCLEAR MATERIALS, 2003, 313 : 67 - 71
[4] Numerical simulations of tungsten melt layer erosion caused by J x B force at TEXTOR
Bazylev, B.
Igitkhanov, Yu
Coenen, J. W.
Philipps, V.
Ueda, Y.
PHYSICA SCRIPTA, 2011, T145
[5] Melt-layer ejection and material changes of three different tungsten materials under high heat-flux conditions in the tokamak edge plasma of TEXTOR
Coenen, J. W.
Philipps, V.
Brezinsek, S.
Pintsuk, G.
Uytdenhouwen, I.
Wirtz, M.
Kreter, A.
Sugiyama, K.
Kurishita, H.
Torikai, Y.
Ueda, Y.
Samm, U.
NUCLEAR FUSION, 2011, 51 (11)
[6] Testing of tungsten and tantalum limiters at the TEXTOR tokamak: Material performance and deuterium retention
Hirai, T
Rubel, M
Philipps, V
Huber, A
Tanabe, T
Wada, M
Ohgo, T
Pospieszczyk, A
Sergienko, G
Wienhold, P
PHYSICA SCRIPTA, 2003, T103 : 59 - 62
[7] Penetration depths of injected/sputtered tungsten in the plasma edge layer of TEXTOR
Laengner, M.
Brezinsek, S.
Coenen, J. W.
Pospieszczyk, A.
Kondratyev, D.
Borodin, D.
Stoschus, H.
Schmitz, O.
Philipps, V.
Samm, U.
JOURNAL OF NUCLEAR MATERIALS, 2013, 438 : S865 - S870
[8] Effects of impurity transport and melt layer motion to the tungsten wall erosion during anomaly events
Ibano, K.
Tsutsui, T.
Lang, T. L.
Togo, S.
Ogawa, Y.
JOURNAL OF NUCLEAR MATERIALS, 2015, 463 : 185 - 188
[9] Tokamak active laser pyrometry for tungsten deposited layer characterisation
Semerok, A.
Jaubert, F.
Fomichev, S. V.
Thro, P. -Y.
Grisolia, C.
FUSION ENGINEERING AND DESIGN, 2012, 87 (03) : 267 - 274
[10] Origin and nature of the emissive sheath surrounding hot tungsten tokamak surfaces
Tolias, P.
Komm, M.
Ratynskaia, S.
Podolnik, A.
NUCLEAR MATERIALS AND ENERGY, 2020, 25

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