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Electron heat transport studies

机译:电子传热研究

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Electron transport in fusion plasmas is intensively studied in coordinated experiments and great progress in physics understanding has been achieved during the past years. A threshold in normalized gradient explains most of the observations, both in steady-state and transient conditions. The results convincingly suggest that trapped electron modes (TEM) dominate electron transport at low and moderate collisionality, with electron heating. The stabilization of these modes at high collisionality predicted by theory is found in the experiments. Electron transport is then driven by the ion temperature gradient modes. At low collisionality, if TEM are stabilized by negative shear and Shafranov shift effects, electron internal transport barriers may develop.
机译:在协同实验中,对聚变等离子体中的电子传输进行了深入研究,并且在过去的几年中,在物理理解上取得了长足的进步。归一化梯度中的阈值解释了稳态和瞬态条件下的大多数观察结果。结果令人信服地表明,在低和中等碰撞度下,随着电子加热,陷阱电子模式(TEM)主导了电子传输。实验中发现了这些模式在理论上预测的高碰撞性下的稳定性。然后,电子传输由离子温度梯度模式驱动。在低碰撞性下,如果通过负剪切力和Shafranov位移效应使TEM稳定,则可能形成电子内部传输势垒。

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