DISCUSSION OF PLASMA INSTABILITY BETWEEN SOLAR WIND AND TYPE-I COMET TAIL

In this paper, the "two-stream" plasma instability between solar wind and comet tail in a force-free field case is discussed. The data come from the exploration for comet Giacobini-Zinner by International Cometary Explorer Spacecraft. The conclusion shows that "two stream" instability exsists in the inner part of a comet if a resonable plasma distribution is considered.