Diamagnetic dynamo: significant at some conditions
Kinetic dynamo No direct measurement In ZT-40, fast electrons detected in edge may imply transport from core
Summary Evidence for importance of MHD and Hall dynamos Some indications that diamagnetic dynamo may be important Would not be surprised if kinetic dynamo was important. Evidence for stochastic transport of particles, energy - why not electron momentum?
Goal: understand what mechanisms are important, under what conditions Possibly dynamo always relaxes plasma toward preferred MHD state - specific mechanisms vary with conditions Experimental dynamo program is active, with new diagnostics.