Detailed comparison between fluctuation characteristics at high-field-side (HFS) and low-fieldside (LFS) scrape off layers (SOLs) has been made, for the first time, in the L mode plasma of JT-60U tokamak using reciprocating Langumuir probes. Statistical analysis based on probability distribution function (PDF) was employed to describe intermittent (non-diffusion) transport in SOL plasma fluctua...

Large amplitude magnetic fluctuation with ion cyclotron range frequency was observed inside the current sheet region during magnetic reconnection in the plasma merging experiment for the first time. The fluctuation exhibited parallel phase velocity close to the drift velocity in the current sheet and parallel wavelength comparable with the ion gyroradius, suggesting that the reconnection rate e...

Fluctuation-driven particle flux is greatly reduced in the plasma radial region where zonal flows are present in the H-1 toroidal heliac. This occurs without reduction in the fluctuation level. Statistical properties of fluctuations are significantly modified in this region. It is shown that the randomization of phases of coherent structures by zonal flows is responsible for the observed effect...

The thermal fluctuation level of the Weibel instability is recalculated. It is shown that the divergence of the fluctuations at long wavelengths, i.e. the Weibel infrared catastrophe, never occurs. At large wavelengths the thermal fluctuation level is terminated by the presence of even the smallest available stable thermal anisotropy. Weibel fields penetrate only one skin depth into the plasma....

Fate of light hadronic excitations above the critical temperature Tc of the QCD phase transition was first investigated 20 years ago.1,2 In Ref. 1 whose title is “Fluctuation effects in hot quark matter: precursors of chiral transition at finite temperature”, the hadrinic modes above Tc were discussed in connection with the critical fluctuation associated with chiral symmetry restoration: The a...