ON THE WAY TO A MULTI-FREQUENCY ECRH SYSTEM FOR ASDEX UPGRADE

被引:0
作者
Stober, J. [1 ]
Franke, Th [1 ]
Gruenwald, G. [1 ]
Leuterer, F. [1 ]
Manini, A. [1 ]
Monaco, F. [1 ]
Muenich, M. [1 ]
Neu, R. [1 ]
Schuetz, H. [1 ]
Wagner, D. [1 ]
Zohm, H. [1 ]
Gantenbein, G. [2 ]
Heidinger, R. [2 ]
Meier, A. [2 ]
Thumm, M. [2 ]
Kasparek, W. [3 ]
Lechte, C. [3 ]
Chirkov, A. V. [4 ]
Denisov, G. G. [4 ]
Litvak, A. [4 ]
Malygin, S. A. [5 ]
Myasnikov, V. E. [5 ]
Nichiporenko, V. O. [5 ]
Popov, L. G. [5 ]
Solyanova, E. A. [5 ]
Tai, E. M. [5 ]
Meo, F. [6 ]
Woskov, P. [7 ]
机构
[1] Max Planck Inst Plasma Phys, EURATOM Assoc, Boltzmannstr 2, D-85748 Garching, Germany
[2] Forschungszentrum Karlsruhe, EURATOM Assoc, Karlsruhe, Germany
[3] Univ Stuttgart, Inst Plasmaforsch, Stuttgart, Germany
[4] RAS, Inst Appl Sci, Nizhnii Novgorod, Russia
[5] GYCOM Ltd, Nizhnii Novgorod, Russia
[6] Tech Univ Denmark, EURATOM Assoc, Roskilde, Denmark
[7] MIT, Plasma Sci & Fusion Ctr, Cambridge, MA 02139 USA
来源
ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING | 2009年
关键词
D O I
10.1142/9789812814647_0061
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
The ECRH system for ASDEX Upgrade is currently extended by 4 multi-frequency units of I MW, 10 s each. The first unit, a two-frequency system is operational since early 2007. The contribution reports on the commissioning of this unit and on two examples of application: at 140 GHz the system is crucial for H-mode operation with the fully W-coated plasma facing components now present in ASDEX Upgrade for moderate values of density and safety-factor, to Suppress central accumulation of heavy impurities. At 105 GHz the EC-beam is used as probe for a collective Thomson scattering diagnostic, which uses the launcher of the second unit as receiver. The other 3 units shall additionally operate at intermediate frequencies, requiring alternative solutions for the windows. For the gyrotron window a Brewster-angle set-up is used successfully. At the torus a Fabry-Perot-type double-disk window is used. It has been tested successfully with low power.
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页码:433 / +
页数:3
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