Generation of superthermal plasma flows in current sheets

The profiles of the He II 3203 Å and He II 4686 Å spectral lines of helium ions have been detected and analyzed. Using these data, the processes of acceleration and heating of a plasma in current sheets that are formed in magnetic configurations with X-type singular lines have been analyzed. The generation of plasma flows with energies of $400$–$1300$ eV, which are much higher than the thermal energy of ions, has been revealed. The acceleration of the plasma induced by Ampere forces is likely spatially inhomogeneous, which should lead to shear plasma flows in a current sheet.