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S. Tsuji-Iio, Y. Komatsu, J. Kondoh1,
H. Tsutsui, T. Murakami, K. Shimada, T. Akiyama,
T. Uemura, R. Shimada
Research Laboratory for Nuclear Reactors, Tokyo Institute of
Technology, O-okayama, Meguro-ku, Tokyo 152-8550, Japan
1 Present address: Electrotechnical Laboratory, 1-1-4 Umezono,
Tsukuba, Ibaraki 305-8568, Japan
Abstract. We manufactured a small pulsed tokamak with force balanced coils
(FBCs), which balance the net centering force and the net radial hoop force
due to the poloidal and toroidal current components, respectively. The
centering force was demonstrated to be reduced by an order of magnitude
compared with the computed one of the TF coils of the same dimension. The
plasma current up to 10 kA was achieved by two-step FBC magnetization since
the force-balanced winding provides not only toroidal magnetic fields but
also the poloidal magnetic flux to induce the plasma current. The plasma
column was well centered in the vacuum vessel within the time constant of
shell effects of the vessel.
IAEA 2001
