Trends of W behavior in ICRF assisted discharges in ASDEX Upgrade

被引：4

作者：

Czarnecka, A. ^{[1
]}

Bobkov, V. ^{[2
]}

Dux, R. ^{[2
]}

Puetterich, T. ^{[2
]}

Sertoli, M. ^{[2
]}

机构：

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

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

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 463卷

关键词：

ANTENNA; SYSTEM; JET;

D O I：

10.1016/j.jnucmat.2014.12.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

During Ion Cyclotron Range of Frequencies (ICRF) operation with metallic plasma facing components, plasma wall interaction processes are modified, which needs to be understood in order to reduce the ICRF-related rise in impurity concentration and maximize ICRF coupling. This contribution is focused on gathering and analyzing a database on W-behavior during ICRF spanning a multi-parameter space. The gas puff dependence is investigated in selected pulses that feature the injection of deuterium (D-2) main gas, with impurity gas nitrogen (N-2), argon (Ar) and krypton (Kr). C-W was found to decrease with the total gas injection rate, which was also correlated with the changes of electron density in the location of the C-W measurements. Although the addition of N-2, Ar and Kr impacted on the increase in sputtering, to achieve a similar C-W level with mixed puffing, one needs to inject considerably more gas. Moreover, C-W is shown to change after implementation of boron coatings on the ICRF antenna limiters. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：601 / 604

页数：4

共 27 条

[1] Investigations of impurity seeding and radiation control for long-pulse and high-density H-mode plasmas in JT-60U [J].

Asakura, N. ;

Nakano, T. ;

Oyama, N. ;

Sakamoto, T. ;

Matsunaga, G. ;

Itami, K. .

NUCLEAR FUSION, 2009, 49 (11)

[2] Tungsten spectroscopy for the measurement of W-fluxes from plasma facing components [J].

Beigman, I. ;

Pospieszczyk, A. ;

Sergienko, G. ;

Tolstikhina, I. Yu ;

Vainshtein, L. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2007, 49 (11) :1833-1847

[3] Influence of Gas Injection Location and Magnetic Perturbations on ICRF Antenna Performance in ASDEX Upgrade [J].

Bobkov, V. ;

Stepanov, I. ;

Jacquet, P. ;

Monakhov, I. ;

Bilato, R. ;

Colas, L. ;

Czarnecka, A. ;

Dux, R. ;

Faugel, H. ;

Kallenbach, A. ;

Mueller, H. W. ;

Noterdaeme, J. -M. ;

Potzel, S. ;

Puetterich, Th. ;

Suttrop, W. .

RADIOFREQUENCY POWER IN PLASMAS, 2014, 1580 :271-274

[4] ICRF operation with improved antennas in ASDEX Upgrade with W wall [J].

Bobkov, V. ;

Balden, M. ;

Bilato, R. ;

Braun, F. ;

Dux, R. ;

Herrmann, A. ;

Faugel, H. ;

Fuenfgelder, H. ;

Giannone, L. ;

Kallenbach, A. ;

Maier, H. ;

Mueller, H. W. ;

Neu, R. ;

Noterdaeme, J-M ;

Puetterich, Th ;

Rohde, V. ;

Tsujii, N. ;

Zeus, F. ;

Zohm, H. .

NUCLEAR FUSION, 2013, 53 (09)

[5] ICRF antenna-plasma interactions and its influence on W sputtering in ASDEX upgrade [J].

Bobkov, Vl ;

Braun, F. ;

Colas, L. ;

Dux, R. ;

Faugel, H. ;

Giannone, L. ;

Herrmann, A. ;

Kallenbach, A. ;

Mueller, H. W. ;

Neu, R. ;

Noterdaeme, J. -M. ;

Puetterich, Th ;

Siegl, G. ;

Wolfrum, E. .

JOURNAL OF NUCLEAR MATERIALS, 2011, 415 (01) :S1005-S1008

[6] Compatibility of ICRF antennas with W-coated limiters for different plasma geometries in ASDEX Upgrade [J].

Bobkov, Vl. V. ;

Braun, F. ;

Dux, R. ;

Herrmann, A. ;

Kallenbach, A. ;

Neu, R. ;

Noterdaeme, J.-M. ;

Puetterich, Th. .

JOURNAL OF NUCLEAR MATERIALS, 2007, 363 (1-3) :122-126

[7] Assessment of compatibility of ICRF antenna operation with full W wall in ASDEX Upgrade [J].

Bobkov, Vl V. ;

Braun, F. ;

Dux, R. ;

Herrmann, A. ;

Giannone, L. ;

Kallenbach, A. ;

Krivska, A. ;

Mueller, H. W. ;

Neu, R. ;

Noterdaeme, J. -M. ;

Puetterich, T. ;

Rohde, V. ;

Schweinzer, J. ;

Sips, A. ;

Zammuto, I. .

NUCLEAR FUSION, 2010, 50 (03)

[8] ICRF system enhancements at ASDEX upgrade [J].

Braun, F ;

Hofmeister, F ;

Wesner, F ;

Becker, W ;

Faugel, H ;

Hartmann, D ;

Noterdaeme, JM .

FUSION ENGINEERING AND DESIGN, 2001, 56-57 :551-555

[9] IMPURITY RELEASE FROM THE ICRF ANTENNA SCREENS IN JET [J].

BURES, M ;

JACQUINOT, J ;

LAWSON, K ;

STAMP, M ;

SUMMERS, HP ;

DIPPOLITO, DA ;

MYRA, JR .

PLASMA PHYSICS AND CONTROLLED FUSION, 1991, 33 (08) :937-967

[10] Impurity production from the ion cyclotron resonance heating antennas in JET [J].

Czarnecka, A. ;

Durodie, F. ;

Figueiredo, A. C. A. ;

Lawson, K. D. ;

Lerche, E. ;

Mayoral, M-L ;

Ongena, J. ;

Van Eester, D. ;

Zastrow, K-D ;

Bobkov, Vl V. ;

Coffey, I. H. ;

Colas, L. ;

Jacquet, P. ;

Monakhov, I. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2012, 54 (07)

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