Two new tools at Alcator C-Mod yield fundamental insights into short-, coherent edge fluctuations associated with steady-state, reactor-relevant regimes.

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Presentation transcript:

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