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中国科学技术大学在东方超环（EAST）等离子体中测量到磁不稳定性产生的发电机（dynamo）效应（图）
东方超环 等离子体 磁不稳定性 发电机效应
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2024/1/31
中国科学技术大学核科学技术学院等离子体物理与聚变工程系的磁测量实验课题组，与中科院等离子体物理研究所团队紧密合作，首次在EAST超导托卡马克装置上测量到内扭曲模的磁扰动幅度分布，并进一步通过磁涨落和电子温度涨落的关联，确定了磁不稳定性诱发的发电机（Dynamo）效应的大小和方向，表明该发电机效应对磁约束聚变装置安全运行密切相关的电流分布控制起重要作用。该工作以“Fluctuation-induce...
Scaling and intermittency in incoherent α-shear dynamo
Dynamo magnetic fields MHD turbulence
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2011/8/17
Abstract: We consider mean-field dynamo models with fluctuating \alpha effect, both with and without shear. The \alpha effect is chosen to be Gaussian white noise with zero mean and given covariance. ...
Kinematic dynamo in spherical Couette flow
Kinematic dynamo spherical Couette flow
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2010/11/18
In this work we investigate numerically the kinematic dynamo driven by spherical Couette flow. We calculate both 2D and 3D flows, different global rotation rates, opposite directions of differential ...
Dynamo Onset as a First-Order Transition: Lessons from a Shell Model for Magnetohydrodynamics
First-Order Transition Magnetohydrodynamics
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2010/4/8
We carry out systematic and high-resolution studies of dynamo action in a shell model for magnetohydrodynamic (MHD) turbulence over wide ranges of the magnetic Prandtl number $Pr_{\rm M}$ and the magn...
Non-linear quenching of current fluctuations in a self-exciting homopolar dynamo,proved by feedback system theory
Non-linear quenching current fluctuations self-exciting homopolar dynamo feedback system theory
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2009/11/13
Hide (Nonlinear Processes in Geophysics, 1998) has produced a new mathematical model of a self-exciting homopolar dynamo driving a series- wound motor, as a continuing contribution to the theory of th...