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Particle and Electron Thermal Transport Research Group

The Transient Transport Working Group focuses on the results-based approach to analyzing particle and electron thermal transport in fusion reactors. The group makes significant contributions in understanding power balance, modulated ECH results, and gradient change enhancement through innovative heating techniques. Their research delves into analyzing Qe gradients, time-dependent perturbation analysis, and evolution to new equilibriums. Future work includes more experiments on particle transport, refined ECH experiments, modulation of electron heating modes, and potential ion heating studies.

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Particle and Electron Thermal Transport Research Group

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Presentation Transcript

  1. Transient Transport Working Group • Emphasis moved from technique to results • Regular contributions to particle and electron thermal transport

  2. Ryter: Complementary power balance and modulated ECH results on ASDEX-U and other machines; new two-point heating to maximize change in gradient • Measure of Qe(Te) from DIII-D • Wade: Necessity of time-dependent perturbation analysis for particle transport to separate D,V

  3. Comment on Density Evolution n to t If t = 1/[d(ln(n)/dt] large; interpretation ambiguous • Jump at to to much smaller D; slow evolution to new equilibrium • Slow evolution in D and/or V beginning at to Need response to known (fast) forcing

  4. Future Work • More particle transport experiments • Continuation of modulated ECH experiments including ingenious refinements • Modulation of other localized electron heating modes • Possible ion heating experiments -- not through fast ions

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