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The goal of Tokamak à Configuration Variable (TCV) is to investigate effects of plasma shape, in particular high elongation (up to 3), on tokamak physics. Such elongated configurations (I(p)=1 MA) are highly vertically unstable with growth rates up to gamma = 4000 s{-1}. Control of the vertical position using the poloidal coils located outside the vessel is limited to gamma greater or equal to 1000 s{-1} because of the shielding effect of the conductive vessel and because of the relative slow time response of their power supplies (0.8 ms thyristor 12 pulse switching at 120 Hz). This dictated the necessity to install a coil set inside the vacuum vessel fed with a Fast Power Supply (FPS). The choice and design of the system with a special attention to the mechanical and electrical constraints in TCV tokamak, as the results and real performances, is presented.

Additional information

Authors: FAVRE A ET AL, École Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse (CH);ELKJAER A, Danfysik A/S, Jyllinge (DK)
Bibliographic Reference: Article: Proceedings of the 19th Symposium on Fusion Technology, Lisboa (PT), September 16-20, 1996
Record Number: 199611539 / Last updated on: 1997-01-27
Original language: en
Available languages: en