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Dynamic behavior of theL-Htransition
Physical Review Letters, 1994The dynamic behavior of the L-H transition in the ASDEX-Upgrade tokamak is described. We focus on the periodic L-H-L transitions known as ``dithering H mode'' and show that there is an intrinsic time scale in this process which is characteristic for the L-H transition.
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Tokamak edge turbulence and the L-H transition
Czechoslovak Journal of Physics, 1998B. N. Rogers, J. F. Drake, A. Zeiler
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A Universal Coherence Law for the L–H Transition
For decades, the transition from low-confinement (L-mode) to high-confinement (H-mode) in magnetically confined plasmas has remained unpredictable, forcing designs to rely on empirical power-threshold fits. We demonstrate that a simple dimensionless ratio, Θ=kBTeh Δν,\Theta = \frac{k_B T_e}{h \, \Delta\nu},Θ=hΔνkBTe, collapses the L→H transition ...openaire +1 more source
AOFT Field Structures of the TCV L–H Transition
We present a compact, data-driven visualisation of organisational dynamics during the TCV L–H transition using the Alpha–Omega Field Theory (AOFT). The effective organisational frequency f(t) = \frac{1}{2\pi}\sqrt{P_{\mathrm{heat}}(t)/W_{\mathrm{MHD}}(t)} is computed directly from experimental heating-power and stored-energy time series of a ...openaire +1 more source
Staged approach towards physics-based L-H transition models
Nuclear Fusion, 2020openaire +1 more source