Zobrazeno 1 - 10
of 278
pro vyhledávání: '"Reiman, A. H."'
Autor:
Fu, Lanke, Mitra, E. Litvinova, Nies, R., Reiman, A. H., Austin, M., Bardoczi, L., Brookman, M., Chen, Xi, Choi, W., Fisch, N. J., Hu, Q., Hyatt, A., Jung, E., La Haye, R., Logan, N. C., Maraschek, M., McClenaghan, J. J., Strait, E., Welander, A., Yang, J., team, ASDEX Upgrade
Theoretical studies have suggested that nonlinear effects can lead to "radio frequency condensation", which coalesces RF power deposition and driven current near the center of a magnetic island. It is predicted that an initially broad current profile
Externí odkaz:
http://arxiv.org/abs/2410.13717
A nonlinear effect, RF (radio frequency) condensation, can be used to facilitate RF stabilization of magnetic islands. Previously studied semi-analytical models for RF condensation are suited mainly for broad deposition profiles and are unable to han
Externí odkaz:
http://arxiv.org/abs/2312.08623
Autor:
Frank, S. J., Perks, C. J., Nelson, A. O., Qian, T., Jin, S., Cavallaro, A. J., Rutkowski, A., Reiman, A. H., Freidberg, J. P., Rodriguez-Fernandez, P., Whyte, D. G.
A new ARC-class, highly-radiative, pulsed, L-mode, burning plasma scenario is developed and evaluated as a candidate for future tokamak reactors. Pulsed inductive operation alleviates the stringent current drive requirements of steady-state reactors,
Externí odkaz:
http://arxiv.org/abs/2207.08726
The stabilization of tearing modes with rf driven current benefits from the cooperative feedback loop between rf power deposition and electron temperature within the island. This effect, termed rf current condensation, can greatly enhance and localiz
Externí odkaz:
http://arxiv.org/abs/2106.07906
Tearing modes in tokamaks typically rotate while small and then lock at a fixed location when larger. Research on present-day devices has focused almost exclusively on stabilisation of rotating modes, as it has been considered imperative to avoid loc
Externí odkaz:
http://arxiv.org/abs/2106.06581
The stabilization of tearing modes with rf waves is subject to a nonlinear effect, termed rf current condensation, that has the potential to greatly enhance and localize current driven within magnetic islands. Here we extend previous investigations o
Externí odkaz:
http://arxiv.org/abs/2102.11833
Autor:
Reiman, A. H., Bertelli, N., Bonoli, P. T., Fisch, N. J., Frank, S. J., Jin, S., Nies, R., Rodriguez, E.
As tokamaks are designed and built with increasing levels of stored energy in the plasma, disruptions become increasingly dangerous. It has been reported that 95% of the disruptions in the Joint European Torus (JET) tokamak with the ITER-like wall ar
Externí odkaz:
http://arxiv.org/abs/2012.15389
Publikováno v:
Phys. Rev. E 103, 053201 (2021)
Because of the large mass differences between electrons and ions, the heat diffusion in electron-ion plasmas exhibits more complex behavior than simple heat diffusion found in typical gas mixtures. In particular, heat is diffused in two distinct, but
Externí odkaz:
http://arxiv.org/abs/2012.00869
By exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilisation of magnetic islands. We present a numerical analysis of current condensation, coupling a geometrical optics
Externí odkaz:
http://arxiv.org/abs/2005.05997
Despite high demonstrated efficiency, lower-hybrid current drive (LHCD) has not been considered localized enough for neoclassical tearing mode (NTM) stabilization in tokamaks. This assessment must be reconsidered in view of the RF current condensatio
Externí odkaz:
http://arxiv.org/abs/2004.10794