Time developments of the current sheet width and the electron temperature estimated from the electron velocity distribution around the current sheet ﹩-0.2L_{0}\leq y\leq 0.2L_{0}﹩ at every ﹩\omega _{pe}t=50﹩. (a) Time development of current sheet width is shown by triangles and a solid line. (b) Development of the electron temperatures ﹩T_{\perp }﹩ and ﹩T_{\Vert }﹩ are shown by the open circles and the filled circles, respectively, with the solid lines.