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Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak

Yong Liu, Yuejiang Shi, Tao Zhang, Chu Zhou, Xiaolan Zou, Hailin Zhao, Ahdi Liu, Tianfu Zhou, Xiang Liu, Shoubiao Zhang2019年被引用 10Nuclear FusionIF 3出版社

Evolution of electron temperature, electron density and its fluctuation with high spatial and temporal resolutions are presented for the cold pulse propagation induced by super-sonic molecular beam injection (SMBI) in ohmic plasmas in the EAST tokamak. The non-local heat transport occurs for discharges with plasma current kA (), and electron density ne0 below a critical value of m−3. In contrary to the response of core electron temperature and electron density (roughly 10 ms after SMBI), the electron density fluctuation in the plasma core increases promptly after SMBI and reaches its maximum around 15 ms after SMBI. The electron density fluctuation in the plasma core begins to decrease before the core electron temperature reaches its maximum (roughly 30 ms). It was also observed that the turbulence perpendicular velocity close to the inversion point of the temperature perturbation changes sign after SMBI.

日本語訳

高空間・高時間分解能での電子温度、電子密度およびその変動の時間発展を、EASTトカマクにおけるオーミックプラズマ中の超音速分子ビーム入射(SMBI)によって誘起された冷パルス伝播について示す。非局所熱輸送は、プラズマ電流 kA()、および電子密度 ne0 が臨界値 m−3 未満である放電において発生する。コア電子温度および電子密度の応答(SMBI後およそ10 ms)とは対照的に、コア電子密度変動はSMBI後に即座に増加し、SMBI後およそ15 msで最大に達する。コア電子密度変動は、コア電子温度が最大値(およそ30 ms)に達する前に減少し始める。また、温度摂動の反転点付近における乱流垂直速度が、SMBI後に符号を変えることも観測された。

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east高精度(タイトル一致)

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EASTNeutral beam injectionMolecular beamSupersonic molecular beam injection
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