LOOP HEATING BY DC ELECTRIC-CURRENT AND ELECTROMAGNETIC-WAVE EMISSIONS SIMULATED BY 3-D EM PARTICLE CODE

We have shown that a current-carrying plasma loop can be heated by mag netic pinch driven by the pressure imbalance between inside and outsid e the loop, using a 3-dimensional electromagnetic (EM) particle code. Both electrons and ions in the loop can be heated in the direction per pendicular to the ambient magnetic field, therefore the perpendicular temperature can be increased about 10 times compared with the parallel temperature. This temperature anisotropy produced by the magnetic pin ch heating can induce a plasma instability, by which high-frequency el ectromagnetic waves can be excited. The plasma current which is enhanc ed by the magnetic pinch can also excite a kinetic kink instability, w hich can heat ions perpendicular to the magnetic field. The heating me chanism of ions as well as the electromagnetic emission could be impor tant for an understanding of the coronal loop heating and the electrom agnetic wave emissions from active coronal regions.