Magnetic field fluctuations (and the associated current perturbation) have been measured in the core of a high-temperature reversed-field pinch using a newly developed fast-polarimetry system. Radial magnetic field fluctuation levels of [Formula presented] are measured in standard-reversed-field pinch discharges which increase to [Formula presented] during the sawtooth crash (enhanced dynamo). The fluctuation level is reduced fourfold for high-confinement plasmas where the core-resonant tearing modes are suppressed.
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy