Fig. 3: Estimate of field-reversal parameter in the Norm configuration during and after reversal process.
From: Generation of field-reversed configurations via neutral beam injection
a Distribution of maximum ζ across 4671 shots with plasma radius (rΔΦ) greater than 40 cm which persisted longer than 30 ms and average ζ during the reversal process while 20 < rΔΦ < 35 cm. Dashed line indicates best result on 2XIIB. b Time history of a typical field-reversed configuration’s (shot #147783) magnetic field (Bz) at the wall (measured) and r = 0 cm (inferred by model described in Eq. (4)), as well as a calculation of ζ(t) itself. Shaded region indicates the pre-reversal averaging time window for the blue distribution in (a).
