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Electrostatic and magnetic turbulence in the TJ-I tokamak

C. Hidalgo, M.A. Pedrosa, A.P. Navarro, F.L. Tabarés, E. Ascasébar, F. Pérez Murano1990年被引用 12Nuclear FusionIF 3出版社

Electrostatic and magnetic turbulence has been investigated in the edge region of the TJ-I tokamak using Langmuir and magnetic probes. The relative levels for density fluctuations are in the range ñ/n ≈ 0.4–0.8 and for magnetic fluctuations /Bt ≈ 5 × 10−5. Density and potential fluctuations do not scale in the same way as a function of plasma radius (i.e. ñ/n ≠ e/Te). The particle confinement time inferred from electrostatic fluctuations is found to increase with increasing magnetic field and electron density. The global particle confinement times estimated from absolute Hα emission intensity measurements are in good agreement with the particle confinement times inferred from electrostatic fluctuations. The contribution of magnetic fluctuations to the edge particle transport is negligible.

日本語訳

TJ-Iトカマクの周辺領域において、ラングミュアプローブおよび磁気プローブを用いて、静電的および磁気的乱流を調査した。密度揺動の相対レベルはñ/n ≈ 0.4–0.8の範囲にあり、磁気揺動の相対レベルは/Bt ≈ 5 × 10−5である。密度および電位揺動は、プラズマ半径の関数として同じようにスケールしない(すなわち、ñ/n ≠ e/Te)。静電的揺動から推定される粒子閉じ込め時間は、磁場および電子密度の増加とともに増加することが見いだされた。絶対Hα発光強度測定から推定される全体の粒子閉じ込め時間は、静電的揺動から推定される粒子閉じ込め時間とよく一致する。周辺粒子輸送への磁気的揺動の寄与は無視できる。

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