Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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S. Besshou¹, K. Aizawa¹, K. Hanatani², K. Kondo¹, T. Mizuuchi², K, Nagasaki², Y. Nakamura¹, M. Nakasuga¹, T. Obiki², H. Okada², F. Sano², M. Wakatani¹, W. L. Ang¹, T. Hamada¹, K. Ichikawa¹, Y. Ikeda¹, H. Kawazome¹, T. Kobayashi¹, Y. Liu¹, S. Maeno¹, Y. Manabe¹, H. Shidara¹, Y. Suzuki¹, M. Takeda¹, T. Takamiya¹, K. Tomiyama¹, O. Yamagishi¹, Y. Ijiri², K. Sakamoto², T. Senju², M. Shibano², K. Toshi², K. Yaguchi<sup>2

1</sup>Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University, Japan
²Institute of Advanced Energy, Kyoto University, Japan

Abstract: This report describes the behavior of the initial plasmas in Heliotron J since July 2000. Hydrogen has been successfully produced by electron cyclotron resonance heating (ECH) (53 GHz, P_ECH ≤ 400 kW, Δ t ≤ 50 ms). The stored energy was measured with the diamagnetic double loops as a function of magnetic field strength (0.61 T< <B> axis < 1.44 T). The value of Wp ≈ 0.7 kJ, which corresponds to <β> 8776; 0.2 %, was obtained by the second harmonic ECH at <B> axis ≈ 0.95 T with the input power 400 kW, l/2π = 0.18 m and <R> axis = 1.20 m. The values of Wp ≈ 0.8 kJ and <β> ≈ 0.1 % were obtained at <B> axis ≈ 1.44 T by the off-axis fundamental ECH. Preliminary magnetic configuration scan with the vertical field coils controls the plasma position (1.1 m < <R> axis < 1.3 m), the rotational transform, etc. The configuration effects on the energy content are discussed.

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