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Runaway electron measurements in the JET tokamak

B Esposito, R Martin Solis, P van Belle, O N Jarvis, F B Marcus, G Sadler, R Sanchez, B Fischer, P Froissard, J M Adams1996年Plasma Physics and Controlled FusionIF 2.2出版社

The perpendicular x-ray emission up a to few MeV of runaway electrons has been measured in JET low-density ohmic discharges by means of the fast electron bremsstrahlung profile monitor. A diffusion model simulating the temporal evolution of the line-integrated x-ray signals is used to determine the runaway radial transport coefficient in the central region of the plasma ( for r/a<0.5); a comparison is made with the predictions of magnetic and electrostatic turbulent transport theories and limits on the level of radial magnetic field fluctuations are found.

日本語訳

JETの低密度オーミック放電における runaway 電子の垂直方向のX線放出が、高速電子制動放射プロファイルモニターを用いて数MeVまで測定された。ライン積分X線信号の時間発展をシミュレートする拡散モデルを用いて、プラズマ中心領域(r/a<0.5)における runaway 電子の径方向輸送係数を決定した。また、磁気流体力学的不安定性および静電乱流輸送理論による予測との比較が行われ、径方向磁場変動レベルの上限が求められた。

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