AI Article Synopsis
- The study focuses on how magnetic fields penetrate and interact with magnetized plasma, which is crucial for understanding both plasma physics and astrophysics.
- Special measurements were carried out using a Hall probe on the DED system of the TEXTOR tokamak, and data were analyzed through a two-fluid plasma model.
- Key findings include that changes in plasma rotation due to forced magnetic reconnection are influenced by the differential rotation between the DED field and plasma, affecting the excitation of tearing modes through momentum transfer mechanisms.
Article Abstract
The magnetic field penetration process into a magnetized plasma is of basic interest both for plasma physics and astrophysics. In this context special measurements on the field penetration and field amplification are performed by a Hall probe on the dynamic ergodic divertor (DED) on the TEXTOR tokamak and the data are interpreted by a two-fluid plasma model. It is observed that the growth of the forced magnetic reconnection by the rotating DED field is accompanied by a change of the plasma fluid rotation. The differential rotation frequency between the DED field and the plasma plays an important role in the process of the excitation of tearing modes. The momentum input from the rotating DED field to the plasma is interpreted by both a ponderomotive force at the rational surface and a radial electric field modified by an edge ergodization.
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| http://dx.doi.org/10.1103/PhysRevLett.97.085003 | DOI Listing |
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