Linear signatures in nonlinear gyrokinetics: interpreting turbulence with pseudospectra

Autor: D R Hatch, F Jenko, A Bañón Navarro, V Bratanov, P W Terry, M J Pueschel

Publikováno v: New Journal of Physics, Vol 18, Iss 7, p 075018 (2016)

A notable feature of plasma turbulence is its propensity to retain features of the underlying linear eigenmodes in a strongly turbulent state—a property that can be exploited to predict various aspects of the turbulence using only linear informatio

Externí odkaz: https://doaj.org/article/558bd2f604ba4033b474d9e43b5de7ce

On the impact of electric field fluctuations on microtearing turbulence

Autor: M. Hamed, M. J. Pueschel, J. Citrin, M. Muraglia, X. Garbet, Y. Camenen

Publikováno v: Physics of Plasmas, 30(4):042303. American Institute of Physics
Physics of Plasmas, 30, 042303

The magnetic drift and the electric potential play an important role in microtearing destabilization by increasing the growth rate of this instability in the presence of collisions, while in electrostatic plasma micro-turbulence, zonal electric poten

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89cf4b56dea9c02fead7179c283375c6
https://doi.org/10.1063/5.0104879

Reduced models for ETG transport in the tokamak pedestal

Autor: D. R. Hatch, C. Michoski, D. Kuang, B. Chapman-Oplopoiou, M. Curie, M. Halfmoon, E. Hassan, M. Kotschenreuther, S. M. Mahajan, G. Merlo, M. J. Pueschel, J. Walker, C. D. Stephens

Publikováno v: Physics of Plasmas, 29(6):062501. American Institute of Physics

This paper reports on the development of reduced models for electron temperature gradient (ETG) driven transport in the pedestal. Model development is enabled by a set of 61 nonlinear gyrokinetic simulations with input parameters taken from pedestals

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e5bcab49c452832dd3d05f4deb62845
https://doi.org/10.1063/5.0087403

Regimes of cosmic-ray diffusion in Galactic turbulence

Autor: P. Reichherzer, L. Merten, J. Dörner, J. Becker Tjus, M. J. Pueschel, E. G. Zweibel

Publikováno v: SN Applied Sciences, 4, 15
Sn Applied Sciences
SN Applied Sciences, 4(1):15. Springer
Appl.Sciences
Appl.Sciences, 2022, 4, pp.15. ⟨10.1007/s42452-021-04891-z⟩
SN Applied Sciences, Vol 4, Iss 1, Pp 1-14 (2021)

Cosmic-ray transport in astrophysical environments is often dominated by the diffusion of particles in a magnetic field composed of both a turbulent and a mean component. This process, which is two-fold turbulent mixing in that the particle motion is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80c07b9a37ce03e02685c7be4f9cb98e
https://www.differ.nl/bibcite/reference/8868

Mechanism for sequestering magnetic energy at large scales in shear-flow turbulence

Autor: B. Tripathi, A. E. Fraser, P. W. Terry, E. G. Zweibel, M. J. Pueschel

Publikováno v: Physics of Plasmas, 29, 070701
Physics of Plasmas, 29(7):070701. American Institute of Physics

Straining of magnetic fields by large-scale shear flow, generally assumed to lead to intensification and generation of small scales, is re-examined in light of the persistent observation of large-scale magnetic fields in astrophysics. It is shown tha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2beef0291a0ac25154a059a8d229bb1f
https://www.differ.nl/bibcite/reference/8803