Abstract
Dynamic stabilization of the helicalm=1 instability was studied in the linear high-β screw pinch ISAR III (Ti≈50 to 500eV;ne≈5·1016 cm−3; β≧0.5). The experimentally determined growth rates ωi (0.5 to 3·106 s−1) and wavelengths (100 to 200 cm) of these modes are about the same as in a toroidal screw pinch and both agree well with theory. Two methods of dynamic stabilization were investigated. In both cases the stabilizing effects were better than expected from existing theory.
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