Barriers for the reduction of transport due to the EXB drift in magnetized plasmas

Details Barriers for the reduction of transport due to the EXB drift in magnetized plasmas Barriers for the reduction of transport due to the EXB drift in magnetized plasmas

2009-01-19

arxiv.org/abs/0901.2848v1

Journal of Physics A Mathematical and Theoretical 42, 42(2009) (2009) 085501

Physics

Mathematical Physics

18

Scientific paper

10.1088/1751-8113/42/8/085501

We consider a 1 1/2degrees of freedom Hamiltonian dynamical system, which models the chaotic dynamics of charged test-particles in a turbulent electric field, across the confining magnetic field in controlled thermonuclear fusion devices. The external electric field E = \nabla\bigvee is modeled by a phenomenological potential V and the magnetic field B is considered uniform. It is shown that, by introducing a small additive control term to the external electric field, it is possible to create a transport barrier for this dynamical system. The robustness of this control method is also investigated. This theoretical study indicates that alternative transport barriers can be triggered without requiring a control action on the device scale as in present Internal Transport Barriers (ITB).

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