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pro vyhledávání: '"Sattin F."'
The ion temperature during magnetic reconnections measured along the direction of the magnetic field at the MST Reverse Field Pinch has not yet received a satisfactory theoretical explanation. In this work we argue that it is consistent with a pictur
Externí odkaz:
http://arxiv.org/abs/2312.13067
Autor:
Sattin, F., Salasnich, L.
Publikováno v:
Physica D 460, 134067 (2024)
TThe Toda-Brumer-Duff (TBD) is an analytical criterion for estimating the local exponential rate of divergence between nearby trajectories in dynamical systems, and it is employed as a test for assessing the existence of chaos therein. It is fairly s
Externí odkaz:
http://arxiv.org/abs/2310.01915
Autor:
Sattin, F., Escande, D. F.
Publikováno v:
Physical Review E 065201 , vol. 107 (2023)
Stochastic heating is a well-known mechanism through which magnetized particles may be energized by low-frequency electromagnetic waves. In its simplest version, under spatially homogeneous conditions, it is known to be operative only above a thresho
Externí odkaz:
http://arxiv.org/abs/2211.07194
Autor:
Sattin, F.
Publikováno v:
Physics Letters A 382 (2018) 2551-2554
Superstatistics [C. Beck and E.G.D. Cohen, Physica A 322, 267 (2003)] is a formalism aimed at describing statistical properties of a generic extensive quantity E in complex out-of-equilibrium systems in terms of a superposition of equilibrium canonic
Externí odkaz:
http://arxiv.org/abs/1804.06359
Autor:
Sattin, F.
Publikováno v:
Physica Scripta 8 (2018) 085001
Time series of observables measured from complex systems do often exhibit non-normal statistics, their statistical distributions (PDF's) are not gaussian and often skewed, with roughly exponential tails. Departure from gaussianity is related to the i
Externí odkaz:
http://arxiv.org/abs/1710.07097
Publikováno v:
Nuclear Fusion 57 (2017) 056010
A limit for the edge density, ruled by radiation losses from light impurities, is established by a minimal cylindrical magneto-thermal equilibrium model. For ohmic tokamak and reversed field pinch the limit scales linearly with the plasma current, as
Externí odkaz:
http://arxiv.org/abs/1609.07956
Publikováno v:
chapter in book "Nonlinear Systems", vol.1 (Springer, 2018)
Diffusion is the macroscopic manifestation of disordered molecular motion. Mathematically, diffusion equations are partial differential equations describing the fluid-like large-scale dynamics of parcels of molecules. Spatially inhomogeneous systems
Externí odkaz:
http://arxiv.org/abs/1512.07428
Experiments featuring fast heat propagation, or so called "non-local" transport, were a puzzle for almost two decades. However recently it was shown, and it is recalled here, that a collective ideal MHD response of the plasma provides a quantitative
Externí odkaz:
http://arxiv.org/abs/1401.7542
Autor:
Sattin, F., Escande, D. F.
Publikováno v:
Physical Review Letters 112, 095003 (2014)
A long standing puzzle in fusion research comes from experiments where a sudden peripheral electron temperature perturbation is accompanied by an almost simultaneous opposite change in central temperature, in a way incompatible with local transport m
Externí odkaz:
http://arxiv.org/abs/1307.6877