RF-sheath patterns modification via novel Faraday screen and strap voltage imbalance on Tore Supra ion cyclotron antennae

被引：19

作者：

Colas, L. ^{[1
]}

Argouarch, A. ^{[1
]}

Bremond, S. ^{[1
]}

Chantant, M. ^{[1
]}

Corre, Y. ^{[1
]}

Firdaouss, M. ^{[1
]}

Goniche, M. ^{[1
]}

Guilhem, D. ^{[1
]}

Gunn, J. -P. ^{[1
]}

Jacquot, J. ^{[1
]}

Kubic, M. ^{[1
]}

Litaudon, X. ^{[1
]}

Lombard, G. ^{[1
]}

Meyer, O. ^{[1
]}

Mollard, P. ^{[1
]}

Vulliez, K. ^{[1
]}

机构：

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

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷

基金：

欧盟地平线“2020”;

关键词：

PLASMA; GENERATION; SOL;

D O I：

10.1016/j.jnucmat.2013.01.061

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using high-resolution diagnostics, this paper investigates experimentally two ways of influencing the radiofrequency (RF) sheath patterns (magnitude and spatial distribution) developing around active Tore Supra ion cyclotron antennae. Firstly two types of Faraday screen electrical designs were compared. The new design aimed at reducing the parallel RF electric field integrated along "long field lines" passing in front of the antenna, by interrupting all parallel RF current paths on its front face. This proved inefficient for attenuating the RF-sheaths on the screen itself, and only weakly modified their distribution. Secondly the ratio of strap RF voltage amplitudes was varied, either during spontaneous bifurcations of the antenna electrical operational point or through the power balance between RF generators. This affected the left-right symmetry of screen heat loads: the local fluxes tended to evolve as the RF voltages on the nearest strap. Both experiments question the method used to optimize the new screen. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：S330 / S333

页数：4

共 17 条

[1] First plasma experiments in Tore Supra with a new generation of high heat flux limiters for RF antennas [J].

Agarici, G ;

Beaumont, B ;

Bibet, P ;

Bremond, S ;

Bucalossi, J ;

Colas, L ;

Durocher, A ;

Gargiulo, L ;

Ladurelle, L ;

Lombard, G ;

Martin, G ;

Mollard, P .

FUSION ENGINEERING AND DESIGN, 2000, 49-50 :145-150

[2] Calorimetry measurements during high energy discharges at Tore Supra [J].

Chantant, M ;

Beaumont, B ;

Bibet, P ;

Ekedahl, A ;

Martinez, A ;

Vallet, JC .

FUSION ENGINEERING AND DESIGN, 2005, 74 (1-4) :897-902

[3] 2-D mapping of ICRF-induced SOL perturbations in Tore Supra tokamak [J].

Colas, L. ;

Gunn, J. P. ;

Nanobashvili, I. ;

Petrzilka, V. ;

Goniche, M. ;

Ekedahl, A. ;

Heuraux, S. ;

Joffrin, E. ;

Saint-Laurent, F. ;

Balorin, C. ;

Lowry, C. ;

Basiuk, V. .

JOURNAL OF NUCLEAR MATERIALS, 2007, 363 :555-559

[4] ION CYCLOTRON RESONANT HEATING IN TORE SUPRA [J].

Colas, L. ;

Vulliez, K. ;

Basiuk, V. .

FUSION SCIENCE AND TECHNOLOGY, 2009, 56 (03) :1173-1204

[5] Characterization of heat flux generated by ICRH heating with cantilevered bars and a slotted box Faraday screen [J].

Corre, Y. ;

Firdaouss, M. ;

Colas, L. ;

Argouarch, A. ;

Guilhem, D. ;

Gunn, J. ;

Hamlyn-Harris, C. ;

Jacquot, J. ;

Kubic, M. ;

Litaudon, X. ;

Missirlian, M. ;

Richou, M. ;

Ritz, G. ;

Serret, D. ;

Vulliez, K. .

NUCLEAR FUSION, 2012, 52 (10)

[6]

Ekedahl A, 2003, AIP CONF PROC, V694, P259, DOI 10.1063/1.1638038

[7] Tore-Supra infrared thermography system, a real steady-state diagnostic [J].

Guilhem, D ;

Bondil, JL ;

Bertrand, B ;

Desgranges, C ;

Lipa, M ;

Messina, P ;

Missirlian, M ;

Portafaix, C ;

Reichle, R ;

Roche, H ;

Saille, A .

FUSION ENGINEERING AND DESIGN, 2005, 74 (1-4) :879-883

[8]

Jacquot J., 2012, P 39 EPS C 16 ICPP S, V36F

[9] Attenuation of ICRH-induced potentials in the SOL of Tore Supra [J].

Kubic, M. ;

Gunn, J. P. ;

Colas, L. ;

Heuraux, S. ;

Faudot, E. ;

Ngadjeu, A. .

RADIO FREQUENCY POWER IN PLASMAS: PROCEEDINGS OF THE 19TH TOPICAL CONFERENCE, 2011, 1406

[10]

Kubic M., 2012, P ICONE C AN

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