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(EXP1/09) First Plasmas in Heliotron J

T. Obiki¹⁾, T. Mizuuchi¹⁾, K. Nagasaki¹⁾, H. Okada¹⁾, S. Besshou²⁾, F. Sano¹⁾, K. Kondo²⁾, Y. Liu¹⁾, Y. Nakamura²⁾, K. Hanatani¹⁾, M. Nakasuga²⁾, M. Wakatani²⁾, T. Hamada¹⁾, Y. Manabe¹⁾, H. Shidara¹⁾, O. Yamagishi²⁾, K. Aizawa²⁾, W. L. Ang¹⁾, Y. I. Ikeda¹⁾, Y. Kawazome²⁾, T. Kobayashi¹⁾, S. Maeno²⁾, T. Takamiya¹⁾, M. Takeda¹⁾, K. Tomiyama²⁾, Y. Ijiri¹⁾, T. Senju¹⁾, K. Yaguchi¹⁾, K. Sakamoto¹⁾, K. Toshi¹⁾, M. Shibano^1)
 
1) Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Japan.
²⁾ Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Japan.

Abstract.  Results obtained in the initial experiment phase of Heliotron J are reported. The electron beam mapping of the magnetic surfaces has revealed that the observed surfaces are in basic agreement with the calculated ones based on the measured ambient field around the device. For 53.2-GHz second harmonic ECH hydrogen plasmas, a fairly wide resonance range for breakdown by the TE₀₂ mode has been observed in Heliotron J as compared with that of Heliotron E. With ECH injection powers up to $\sim$ 400kW, diamagnetic stored energies up to $\sim$ 0.7 kJ were obtained without the optimized density control.

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