Results 71 to 80 of about 922 (184)

Influence of the density gradient on turbulent heat transport at ion-scales: an inter-machine study with the gyrokinetic code stella

open access: yesNuclear Fusion
Efficient control of turbulent heat transport is crucial for magnetic confinement fusion reactors. This work discusses the complex interplay between density gradients and microinstabilities, shedding light on their impact on turbulent heat transport in ...
H. Thienpondt   +4 more
doaj   +1 more source

Impact of nitrogen seeding on L–H transitions and their role for detachment in ASDEX Upgrade

open access: yesNuclear Fusion
The required heating power, $P_{\mathrm{LH}}$ , to access the high confinement regime (H-mode) in nitrogen seeded deuterium plasmas is investigated at the ASDEX Upgrade tokamak. It is shown that a stepwise increase of the nitrogen seeding level increases
G. Birkenmeier   +10 more
doaj   +1 more source

Reversal of the isotopic dependence of energy confinement in system size scans

open access: yesNuclear Fusion
We report a reversal in the isotopic dependence of energy confinement with increasing system size $\rho^{\ast-1}$ from electrostatic global δ f gyrokinetic simulations.
Lei Qi   +3 more
doaj   +1 more source

Balancing physics priors and data for disruption prediction in future tokamaks

open access: yesNuclear Fusion
Disruption remains a major barrier to the safe, sustained operation of tokamaks. Although current understanding of disruption physics is broadly valid across existing tokamaks, it cannot provide accurate disruption prediction rules.
Fengming Xue   +11 more
doaj   +1 more source

Stellarators with enhanced tritium confinement and edge radiation control

open access: yesNuclear Fusion
A stellarator design is described with the purpose of achieving three goals: (1) enhance the confinement time of tritium. (2) Have a sufficient density of high- Z impurities to radiate the thermal power escaping from the core while having an extremely ...
Allen H. Boozer
doaj   +1 more source

H-mode dithering phase studies on ST40. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2023
Andrew Y   +9 more
europepmc   +1 more source

SPECTRA ANALYSIS OF RUNAWAY ELECTRON SYNCHROTRON RADIATION FOR THE RECENT EAST RUNAWAY EXPERIMENT

open access: yesEast European Journal of Physics, 2017
The energy of disruption generated runaway electrons can reach as high as tens of megaelectronvolt and they can cause a serious damage of plasma-facing-component surfaces in large tokamaks like International Thermonuclear Experimental Reactor (ITER). The
I. M. Pankratov, V. Y. Bochko
doaj  

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