1. Two new tools at Alcator C-Mod yield fundamental insights into short-, coherent edge fluctuations associated with steady-state, reactor-relevant regimes.
Scanning Mirror Langmuir Probe
Simultaneously measures high-resolution n, Te, F profiles & fluctuations across edge plasma with unprecedented detail
Reveals Quasi-Coherent Mode to be a drift-wave with interchange forcing
Shoelace Antenna
Inductively drives a drift-wave-like perturbation in a tokamak edge for the first time
Weakly-damped resonance is
detected at frequency and k of the QCM
Suggests that it is possible to actively regulate particle/impurity transport across LCFS
resonances
QCM spatial profile