Equilibrium fluctuation energy of gyrokinetic plasma

Gyrokinetic statistical absolute equilibrium and turbulence

Free energy cascade in gyrokinetic turbulence.

In gyrokinetic theory, the quadratic nonlinearity is known to play an important role in the dynamics by redistributing (in a conservative fashion) the free energy between the various active scales. In the present study, the free energy transfer is analyzed for the case of ion temperature gradient driven turbulence. It is shown that it shares many properties with the energy transfer in fluid tur...

Fluctuation-dissipation relations and energy landscape in an out-of-equilibrium strong-glass-forming liquid.

We study the out-of-equilibrium dynamics following a temperature jump in a model for silica, a strong liquid, and compare it with the well known case of fragile liquids. We calculate the fluctuation-dissipation relation, from which it is possible to estimate an effective temperature T(eff) associated with the slow out-of-equilibrium structural degrees of freedom. We find the striking and unexpl...

Fluctuation-Dissipation Relations Far from Equilibrium.

Near equilibrium, where all currents of a system vanish on average, the fluctuation-dissipation relation (FDR) connects a current's spontaneous fluctuations with its response to perturbations of the conjugate thermodynamic force. Out of equilibrium, fluctuation-response relations generally involve additional nondissipative contributions. Here, in the framework of stochastic thermodynamics, we s...

Soft-x-ray emission, plasma equilibrium, and fluctuation studies on Madison Symmetric Torus

A miniature multichord soft-x-ray detection system has been installed on the Madison Symmetric Torus ~MST! reversed-field pinch to study the plasma equilibrium and fluctuation properties of standardand improved-confinement discharges. Because of the relatively flat MST density and temperature profiles, the spatial resolution is relatively poor along the line of sight. However, the system can re...