Ten years of W programme in ASDEX Upgrade-challenges and conclusions

被引：78

作者：

Neu, R. ^{[1
]}

Bobkov, V. ^{[1
]}

Dux, R. ^{[1
]}

Fuchs, J. C. ^{[1
]}

Gruber, O. ^{[1
]}

Herrmann, A. ^{[1
]}

Kallenbach, A. ^{[1
]}

Maier, H. ^{[1
]}

Mayer, M. ^{[1
]}

Puetterich, T. ^{[1
]}

Rohde, V. ^{[1
]}

Sips, A. C. C. ^{[2
]}

Stober, J. ^{[1
]}

Sugiyama, K. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

[2] Culham Sci Ctr, EFDA Close Support Unit, Abingdon, Oxon, England

来源：

PHYSICA SCRIPTA | 2009年 / T138卷

关键词：

TUNGSTEN COATINGS; DIII-D; DIVERTOR; TRANSPORT; DISCHARGES; GRAPHITE; TOKAMAK; PLASMAS; TILES; CFC;

D O I：

10.1088/0031-8949/2009/T138/014038

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Since 1999 ASDEX Upgrade increased its tungsten plasma-facing components (PFCs) and finally reached a full W coverage in 2007. Most of the initial goals of the investigations were successfully achieved. A highlight of the investigations was multiple start-ups and operation without any boronization demonstrating that performance and confinement similar to boronized operation with carbon PFCs can be reached in high power, high density discharges. This also allowed the investigation of the hydrogen retention without disturbing effects from the low-Z coating. A strong reduction of hydrogen retention was found in gas balance measurements as well as in post-mortem analyses. On the other hand, an almost complete suppression of low-Z divertor radiation was achieved after boronization, providing valuable information on the control requirements of radiative cooling by artificially introduced impurities. Among the challenges remains the strong increase of the W source and W concentration resulting from ICRH. At the same time it helped to identify the underlying physics and may lead to solutions superior to the presently used ones.

引用

页数：6

共 39 条

[1] Edge Te and ne profiles during type-I ELM mitigation experiments with perturbation fields on JET [J].

Alfier, A. ;

Beurskens, M. ;

Giovannozzi, E. ;

Kempenaars, M. ;

Koslowski, H. R. ;

Liang, Y. ;

McKenna, C. ;

Pasqualotto, R. ;

Saarelma, S. ;

Walsh, M. ;

De La Luna, E. .

NUCLEAR FUSION, 2008, 48 (11)

[2]

BOBKOV V, 2009, NUCL FUSION IN PRESS

[3] Plasma-wall interaction and plasma behaviour in the non-boronised all tungsten ASDEX Upgrade [J].

Dux, R. ;

Bobkov, V. ;

Herrmann, A. ;

Janzer, A. ;

Kallenbach, A. ;

Neu, R. ;

Mayer, M. ;

Mueller, H. W. ;

Pugno, R. ;

Puetterich, T. ;

Rohde, V. ;

Sips, A. C. C. .

JOURNAL OF NUCLEAR MATERIALS, 2009, 390-91 :858-863

[4] RMP ELM suppression in DIII-D plasmas with ITER similar shapes and collisionalities [J].

Evans, T. E. ;

Fenstermacher, M. E. ;

Moyer, R. A. ;

Osborne, T. H. ;

Watkins, J. G. ;

Gohil, P. ;

Joseph, I. ;

Schaffer, M. J. ;

Baylor, L. R. ;

Becoulet, M. ;

Boedo, J. A. ;

Burrell, K. H. ;

deGrassie, J. S. ;

Finken, K. H. ;

Jernigan, T. ;

Jakubowski, M. W. ;

Lasnier, C. J. ;

Lelmen, M. ;

Leonard, A. W. ;

Lonnroth, J. ;

Nardon, E. ;

Parail, V. ;

Schmitz, O. ;

Unterberg, B. ;

West, W. P. .

NUCLEAR FUSION, 2008, 48 (02)

[5] Suppression of large edge localized modes with edge resonant magnetic fields in high confinment DIII-D plasmas [J].

Evans, TE ;

Moyer, RA ;

Watkins, JG ;

Osborne, TH ;

Thomas, PR ;

Becoulet, M ;

Boedo, JA ;

Doyle, EJ ;

Fenstermacher, ME ;

Finken, KH ;

Groebner, RJ ;

Groth, M ;

Harris, JH ;

Jackson, GL ;

La Haye, RJ ;

Lasnier, CJ ;

Masuzaki, S ;

Ohyabu, N ;

Pretty, DG ;

Reimerdes, H ;

Rhodes, TL ;

Rudakov, DL ;

Schaffer, MJ ;

Wade, MR ;

Wang, G ;

West, WP ;

Zeng, L .

NUCLEAR FUSION, 2005, 45 (07) :595-607

[6] High-heat-flux loading of tungsten coatings on graphite deposited by plasma spray and physical vapor deposition [J].

GarciaRosales, C ;

Deschka, S ;

Hohenauer, W ;

Duwe, R ;

Gauthier, E ;

Linke, J ;

Lochter, M ;

Mallener, WKWM ;

Plochl, L ;

Rodhammer, P ;

Salito, A .

FUSION TECHNOLOGY, 1997, 32 (02) :263-276

[7] Compatibility of ITER scenarios with full tungsten wall in ASDEX Upgrade [J].

Gruber, O. ;

Sips, A. C. C. ;

Dux, R. ;

Eich, T. ;

Fuchs, J. C. ;

Herrmann, A. ;

Kallenbach, A. ;

Maggi, C. F. ;

Neu, R. ;

Puetterich, T. ;

Schweinzer, J. ;

Stober, J. .

NUCLEAR FUSION, 2009, 49 (11)

[8] Experiences with tungsten coatings in high heat flux tests and under plasma load in ASDEX Upgrade [J].

Herrmann, A. ;

Greuner, H. ;

Fuchs, J. C. ;

de Marne, P. ;

Neu, R. .

PHYSICA SCRIPTA, 2009, T138

[9] Integrated exhaust control with divertor parameter feedback and pellet ELM pacemaking in ASDEX Upgrade [J].

Kallenbach, A ;

Lang, PT ;

Dux, R ;

Fuchs, C ;

Herrmann, A ;

Meister, H ;

Mertens, V ;

Neu, R ;

Pütterich, T ;

Zehetbauer, T .

JOURNAL OF NUCLEAR MATERIALS, 2005, 337 (1-3) :732-736

[10] Non-boronized compared with boronized operation of ASDEX Upgrade with full-tungsten plasma facing components [J].

Kallenbach, A. ;

Dux, R. ;

Mayer, M. ;

Neu, R. ;

Puetterich, T. ;

Bobkov, V. ;

Fuchs, J. C. ;

Eich, T. ;

Giannone, L. ;

Gruber, O. ;

Herrmann, A. ;

Horton, L. D. ;

Maggi, C. F. ;

Meister, H. ;

Mueller, H. W. ;

Rohde, V. ;

Sips, A. ;

Staebler, A. ;

Stober, J. .

NUCLEAR FUSION, 2009, 49 (04)

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