Power load studies in JET and ASDEX-Upgrade with full-W divertors

被引：50

作者：

Sieglin, B. ^{[2
]}

Eich, T. ^{[2
]}

Scarabosio, A. ^{[2
]}

Arnoux, G. ^{[3
]}

Balboa, I. ^{[3
]}

Devaux, S. ^{[2
]}

Herrmann, A. ^{[2
]}

Hoppe, F. ^{[2
]}

Hoelzl, M. ^{[2
]}

Kallenbach, A. ^{[2
]}

Lang, P. ^{[2
]}

Matthews, G. F. ^{[3
]}

Marsen, S. ^{[4
]}

Pamela, S. ^{[3
]}

Rack, M. ^{[5
]}

Wenninger, R. ^{[2
]}

机构：

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

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

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

[4] Max Planck Inst Plasma Phys, D-17491 Greifswald, Germany

[5] Forschungszentrum Julich GmbH, Assoc EURATOM FZJ, Inst Energy & Climate Research Plasma Phys, D-52425 Julich, Germany

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2013年 / 55卷 / 12期

基金：

欧盟地平线“2020”;

关键词：

TUNGSTEN; PLASMAS;

D O I：

10.1088/0741-3335/55/12/124039

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：

For the design and operation of large fusion devices, a detailed understanding of the power exhaust processes is necessary. This paper will give an overview of the current research on divertor power load mechanisms. The results shown are obtained in JET with the ITER-like wall (ILW) and ASDEX-Upgrade with tungsten coated plasma-facing components (PFCs). The challenges of infrared thermography on an ITER-like bulk tungsten divertor are presented. For the steady-state heat load, the power fall-off length lambda(q) in JET-ILW is compared to an empirical scaling found in JET and the ASDEX-Upgrade with carbon PFCs. A first attempt to scale the divertor broadening S in the ASDEX-Upgrade with tungsten PFCs is shown. The edge localized mode (ELM) duration t(ELM) in JET-C and JET-ILW is compared. For similar pedestal conditions (T-e,T-ped and n(e,ped)), similar ELM durations are found in JET-C and JET-ILW. For higher n(e,ped) at the same pedestal pressure p(e,ped), longer ELM durations are found in JET-ILW. The pedestal pressure p(e,ped) is found to be a good qualifier for the ELM energy fluency in both JET-C and JET-ILW. Improved diagnostic capabilities reveal ELM substructures on the divertor target occurring a few milliseconds before the ELM crash.

引用

页数：8

共 28 条

[1] Upgrade of the infrared camera diagnostics for the JET ITER-like wall divertor [J].

Balboa, I. ;

Arnoux, G. ;

Eich, T. ;

Sieglin, B. ;

Devaux, S. ;

Zeidner, W. ;

Morlock, C. ;

Kruezi, U. ;

Sergienko, G. ;

Kinna, D. ;

Thomas, P. D. ;

Rack, M. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2012, 83 (10)

[2] The effect of a metal wall on confinement in JET and ASDEX Upgrade [J].

Beurskens, M. N. A. ;

Schweinzer, J. ;

Angioni, C. ;

Burckhart, A. ;

Challis, C. D. ;

Chapman, I. ;

Fischer, R. ;

Flanagan, J. ;

Frassinetti, L. ;

Giroud, C. ;

Hobirk, J. ;

Joffrin, E. ;

Kallenbach, A. ;

Kempenaars, M. ;

Leyland, M. ;

Lomas, P. ;

Maddison, G. ;

Maslov, M. ;

McDermott, R. ;

Neu, R. ;

Nunes, I. ;

Osborne, T. ;

Ryter, F. ;

Saarelma, S. ;

Schneider, P. A. ;

Snyder, P. ;

Tardini, G. ;

Viezzer, E. ;

Wolfrum, E. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2013, 55 (12)

[3] Edge-localized modes - physics and theory [J].

Connor, JW .

PLASMA PHYSICS AND CONTROLLED FUSION, 1998, 40 (05) :531-542

[4] Type-I ELM filamentary substructure on the JET divertor target [J].

Devaux, S. ;

Eich, T. ;

Arnoux, G. ;

Fundamenski, W. ;

Thomsen, H. .

JOURNAL OF NUCLEAR MATERIALS, 2011, 415 (01) :S865-S868

[5]

Devaux S, 2011, 38 EPS C PLASM PHYS, V35, P49

[6] Type-I ELM substructure on the divertor target plates in ASDEX Upgrade [J].

Eich, T ;

Herrmann, A ;

Neuhauser, J ;

Dux, R ;

Fuchs, JC ;

Günter, S ;

Horton, LD ;

Kallenbach, A ;

Lang, PT ;

Maggi, CF ;

Maraschek, M ;

Rohde, V ;

Schneider, W .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (06) :815-842

[7] Nonaxisymmetric energy deposition pattern on ASDEX upgrade divertor target plates during type-I edge-localized modes [J].

Eich, T ;

Herrmann, A ;

Neuhauser, J .

PHYSICAL REVIEW LETTERS, 2003, 91 (19)

[8] Empiricial scaling of inter-ELM power widths in ASDEX Upgrade and JET [J].

Eich, T. ;

Sieglin, B. ;

Scarabosio, A. ;

Herrmann, A. ;

Kallenbach, A. ;

Matthews, G. F. ;

Jachmich, S. ;

Brezinsek, S. ;

Rack, M. ;

Goldston, R. J. .

JOURNAL OF NUCLEAR MATERIALS, 2013, 438 :S72-S77

[9] Inter-ELM Power Decay Length for JET and ASDEX Upgrade: Measurement and Comparison with Heuristic Drift-Based Model [J].

Eich, T. ;

Sieglin, B. ;

Scarabosio, A. ;

Fundamenski, W. ;

Goldston, R. J. ;

Herrmann, A. .

PHYSICAL REVIEW LETTERS, 2011, 107 (21)

[10] Type-I ELM power deposition profile width and temporal shape in JET [J].

Eich, T. ;

Thomsen, H. ;

Fundamenski, W. ;

Arnoux, G. ;

Brezinsek, S. ;

Devaux, S. ;

Herrmann, A. ;

Jachmich, S. ;

Rapp, J. .

JOURNAL OF NUCLEAR MATERIALS, 2011, 415 (01) :S856-S859

← 1 2 3 →