Driven Resonance in Partially Relaxed Plasmas

Details Driven Resonance in Partially Relaxed Plasmas Driven Resonance in Partially Relaxed Plasmas

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvl..98q5001t&link_type=abstract

Physical Review Letters, vol. 98, Issue 17, id. 175001

Statistics

Applications

3

Spheromaks, Current Drive, Helicity Injection, Magnetohydrodynamics And Plasmas

Scientific paper

A Taylor-relaxed plasma (j=kB with k a constant) under external magnetic helicity injection encounters resonances in spatial frequencies of its force-free eigenmodes. Such driven resonance underlies the physics of magnetic self-organization and determines the flux amplification in laboratory helicity injection applications. Here we show that for partially relaxed plasmas where the deviation from the fully relaxed Taylor state, for example, a flux-dependent k, is a function of the normalized flux χ/χa with χa the poloidal flux at the magnetic axis, a modified driven resonance persists even if k(χ) has an order-unity variation across the flux surfaces.

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