Stable Spheromaks with Profile Control

Fowler, T K ; Jayakumar, R

关键词: CURRENT DENSITY;    NIMROD;    NON-INDUCTIVE CURRENT DRIVE;    RELAXATION;    STABILITY;    THERMONUCLEAR REACTORS;   

DOI  :  10.2172/926008
RP-ID  :  LLNL-TR-400902
PID  :  OSTI ID: 926008
Others  :  TRN: US0802518

美国|英语

来源: SciTech Connect

【 摘 要 】

A spheromak equilibrium with zero edge current is shown to be stable to both ideal MHD and tearing modes that normally produce Taylor relaxation in gun-injected spheromaks. This stable equilibrium differs from the stable Taylor state in that the current density j falls to zero at the wall. Estimates indicate that this current profile could be sustained by non-inductive current drive at acceptable power levels. Stability is determined using the NIMROD code for linear stability analysis. Non-linear NIMROD calculations with non-inductive current drive could point the way to improved fusion reactors.