title: Suppression of n=1 tilt instability by magnetic shaping coils in Rotamak plasmas.
abstract: Measurements from the array of Mirnov magnetic coils provide the first evidence for n=1 tilt and radial shift instabilities in a 40 ms field-reversed configuration (FRC) driven by rotating magnetic field. External plasma-shaping magnetic coils are utilized to suppress the n=1 instability modes. It is demonstrated that by energizing the middle shaping coil with 250-500 A current, the tilt mode is completely suppressed when a doublet FRC with an internal figure-of-eight separatrix is formed.
authors: Prairie View A & M University, Prairie View, Texas 77446, USA.
authors: X
authors: X
authors: Yang
authors: Y
authors: Y
authors: Petrov
authors: T S
authors: TS
authors: Huang