Perpendicular ion heating in turbulence and reconnection: magnetic moment breaking by coherent fluctuations [0.03%]
湍流和重联中的垂加热:相干涨落破坏磁矩
Alfred Mallet,Kristopher Klein,Benjamin Divakar Giles Chandran et al.
Alfred Mallet et al.
We study the interaction of an ion with a fluctuation in the electromagnetic fields that is localised in both space and time. We study the scale dependence of the interaction in both space and time, deriving a generic form for the ion's ene...
Omar French,Gregory R Werner,Dmitri A Uzdensky
Omar French
Relativistic magnetic reconnection has been proposed as an important non-thermal particle acceleration (NTPA) mechanism that generates power-law spectra and high-energy emissions. Power-law particle spectra are in general characterised by t...
Relativistic Nonthermal Particle Acceleration in Two-Dimensional Collisionless Magnetic Reconnection [0.03%]
二维无碰撞磁重联中的相对论非热粒子加速
Dmitri A Uzdensky
Dmitri A Uzdensky
Magnetic reconnection, especially in the relativistic regime, provides an efficient mechanism for accelerating relativistic particles and thus offers an attractive physical explanation for nonthermal high-energy emission from various astrop...
Jean C Perez,Benjamin D G Chandran,Kristopher G Klein et al.
Jean C Perez et al.
A growing body of evidence suggests that the solar wind is powered to a large extent by an Alfvén-wave (AW) energy flux. AWs energize the solar wind via two mechanisms: heating and work. We use high-resolution direct numerical simulations ...
J Squire,A A Schekochihin,E Quataert et al.
J Squire et al.
We propose that pressure anisotropy causes weakly collisional turbulent plasmas to self-organize so as to resist changes in magnetic-field strength. We term this effect "magneto-immutability" by analogy with incompressibility (resistance to...
Stochastic proton heating by kinetic-Alfvén-wave turbulence in moderately high- β plasmas [0.03%]
中等β值等离子体中动理学阿尔芬波湍流的随机质子加热
Ian W Hoppock,Benjamin D G Chandran,Kristopher G Klein et al.
Ian W Hoppock et al.
Stochastic heating refers to an increase in the average magnetic moment of charged particles interacting with electromagnetic fluctuations whose frequencies are much smaller than the particles' cyclotron frequencies. This type of heating ar...
Pressure-anisotropy-induced nonlinearities in the kinetic magnetorotational instability [0.03%]
压强各向异性引起的动理论磁旋转不稳定性非线性效应
J Squire,E Quataert,M W Kunz
J Squire
In collisionless and weakly collisional plasmas, such as hot accretion flows onto compact objects, the magnetorotational instability (MRI) can differ significantly from the standard (collisional) MRI. In particular, pressure anisotropy with...
Parametric Instability, Inverse Cascade, and the 1 /f Range of Solar-Wind Turbulence [0.03%]
参数不稳定、反向级联和太阳风湍流的1/f范围
Benjamin D G Chandran
Benjamin D G Chandran
In this paper, weak turbulence theory is used to investigate the nonlinear evolution of the parametric instability in 3D low-β plasmas at wavelengths much greater than the ion inertial length under the assumption that slow magnetosonic wav...