Experimental estimation of tungsten impurity sputtering due to Type I ELMs in JET-ITER-like wall using pedestal electron cyclotron emission and target Langmuir probe measurements

被引：44

作者：

Guillemaut, C. ^{[1
,2
,16
]}

Jardin, A. ^{[3
]}

Horacek, J. ^{[4
,49
]}

Borodkina, I. ^{[3
,5
]}

Autricque, A. ^{[3
]}

Arnoux, G. ^{[6
,15
]}

Boom, J. ^{[7
,61
]}

Brezinsek, S. ^{[8
,41
]}

Coenen, J. W. ^{[8
,41
]}

De La Luna, E. ^{[9
]}

Devaux, S. ^{[10
,61
]}

Eich, T. ^{[7
]}

Harting, D. ^{[6
,15
,41
]}

Kirschner, A. ^{[8
,41
]}

Lipschultz, B. ^{[11
,63
,104
]}

Matthews, G. F. ^{[6
,15
]}

Meigs, A. ^{[6
]}

Moulton, D. ^{[6
,13
]}

O'Mullane, M. ^{[12
,59
]}

Stamp, M. ^{[6
]}

Abhangi, M. ^{[46
]}

Abreu, P. ^{[52
]}

Aftanas, M. ^{[49
]}

Afzal, M. ^{[15
]}

Aggarwal, K. M. ^{[32
]}

Aho-Mantila, L. ^{[106
]}

Ahonen, E. ^{[13
]}

Aints, M. ^{[102
]}

Airila, M. ^{[106
]}

Albanese, R. ^{[100
]}

Alegre, D. ^{[58
]}

Alessi, E. ^{[45
]}

Aleynikov, P. ^{[54
]}

Alfier, A. ^{[19
]}

Alkseev, A. ^{[67
]}

Allan, P. ^{[15
]}

Almaviva, S. ^{[91
]}

Alonso, A. ^{[58
]}

Alper, B. ^{[15
]}

Alsworth, I. ^{[15
]}

Alves, D. ^{[52
]}

Ambrosino, G. ^{[100
]}

Ambrosino, R. ^{[101
]}

Amosov, V. ^{[84
]}

Andersson, F. ^{[23
]}

Andersson Sunden, E. ^{[27
]}

Angelone, M. ^{[86
]}

Anghel, A. ^{[81
]}

Anghel, M. ^{[80
]}

Angioni, C. ^{[61
]}

机构：

[1] EUROfus Consortium, JET, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] Univ Lisbon, Inst Super Tecn, Inst Plasmas & Fusao Nucl, P-1699 Lisbon, Portugal

[3] CEA, IRFM, F-13108 St Paul Les Durance, France

[4] Inst Plasma Phys AS CR, IPPCR, Slovankou 3, Prague 18221 8, Czech Republic

[5] Natl Res Nucl Univ MEPhI, Kashirskoye Sh 31, Moscow 115409, Russia

[6] Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England

[7] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

[8] Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany

[9] CIEMAT, Lab Nacl Fus, E-28040 Madrid, Spain

[10] Univ Lorraine, CNRS UMR7198, Inst Jean Lamour, F-54506 Vandoeuvre Les Nancy, France

[11] Univ York, YPI, York YO10 5DQ, N Yorkshire, England

[12] Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland

[13] Aalto Univ, FIN-00076 Aalto, Finland

[14] BCS, Barcelona, Spain

[15] Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England

[16] IRFM, CEA, F-13108 St Paul Les Durance, France

[17] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

[18] Consorzio CREATE, I-80125 Naples, Italy

[19] Consorzio RFX, I-35127 Padua, Italy

[20] Daegu Univ, Gyongsan 712174, Gyeongbuk, South Korea

[21] Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain

[22] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium

[23] Chalmers Univ Technol, Dept Earth & Space Sci, SE-41296 Gothenburg, Sweden

[24] Univ Cagliari, Dept Elect & Elect Engn, I-09123 Cagliari, Italy

[25] Comenius Univ, Fac Math Phys & Informat, Dept Expt Phys, Bratislava 84248, Slovakia

[26] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G4 ONG, Lanark, Scotland

[27] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[28] Lund Univ, Dept Phys, SE-22100 Lund, Sweden

[29] KTH, SCI, Dept Phys, SE-10691 Stockholm, Sweden

[30] Univ Oxford, Dept Phys, Oxford OX1 2JD, England

[31] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[32] Queens Univ, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland

[33] Univ Catania, Dipartimento Ingn Elettr Elettr & Sistemi, I-95125 Catania, Italy

[34] Dublin City Univ, Dublin, Ireland

[35] CRPP, EPFL, CH-1015 Lausanne, Switzerland

[36] CNRS, UMR 7648, Ecole Polytech, F-91128 Palaiseau, France

[37] EUROfus Programme Management Unit, D-85748 Garching, Germany

[38] Culham Sci Ctr, EUROfus Programme Management Unit, Abingdon OX14 3DB, Oxon, England

[39] European Commiss, B-1049 Brussels, Belgium

[40] FOM Inst DIFFER, NL-3430 BE Nieuwegein, Netherlands

[41] Forsch Zentrum Julich GmbH, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany

[42] Fus Energy Joint Undertaking, Barcelona 08019, Spain

[43] KTH, EES, Fus Plasma Phys, SE-10044 Stockholm, Sweden

[44] Gen Atom, San Diego, CA 85608 USA

[45] IFP CNR, I-20125 Milan, Italy

[46] Inst Plasma Res, Gandhinagar 382428G, Gujarat, India

[47] Bulgarian Acad Sci, Inst Elect, BU-1784 Sofia, Bulgaria

[48] Inst Plasma Phys & Laser Microfus, PL-01497 Warsaw, Poland

[49] Inst Plasma Phys AS CR, Prague 182 00 8, Czech Republic

[50] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

来源：

PHYSICA SCRIPTA | 2016年 / T167卷

关键词：

tungsten sputtering; edge localized mode; magnetic confinement fusion;

D O I：

10.1088/0031-8949/2015/T167/014005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ITER baseline scenario, with 500 MW of DT fusion power and Q = 10, will rely on a Type I ELMy H-mode and will be achieved with a tungsten (W) divertor. W atoms sputtered from divertor targets during mitigated ELMs are expected to be the dominant source in ITER. W impurity concentration in the plasma core can dramatically degrade its performance and lead to potentially damaging disruptions. Understanding the physics of the target W source due to sputtering during ELMs and inter-ELMs is important and can be helped by experimental measurements with improved precision. It has been established that the ELMy target ion impact energy has a simple linear dependence with the pedestal electron temperature measured by Electron Cyclotron Emission (ECE). It has also been shown that Langmuir Probes (LP) ion flux measurements are reliable during ELMs due to the surprisingly low electron temperature. Therefore, in this paper, LP and ECE measurements in JET-ITER-Like-Wall (ILW) unseeded Type I ELMy H-mode experiments have been used to estimate the W sputtering flux from divertor targets in ELM and inter-ELM conditions. Comparison with similar estimates using W I spectroscopy measurements shows a reasonable agreement for the ELM and inter-ELM W source. The main advantage of the method involving LP measurements is the very high time resolution of the diagnostic (similar to 10 mu s) allowing very precise description of the W sputtering source during ELMs.

引用

页数：7

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