帶電粒子束所引起的不穩定性在太空電漿環境中普遍存在著。本文利用一維靜電場全粒子模式探討帶電粒子束所產生的不穩定性問題，主要的應用在地球磁層電漿邊界層由電子與背景電漿所造成的不穩定性效應，以及天文系統中由不同來源之帶電粒子相對運動所產生的不穩定性。我們考慮的自由參數包括：帶電粒子束的漂移速度相對於光速之比、帶電粒子束之熱速度相對於漂移速度之比，以及離子與電子之質量比。我們分析孤立波之形成、特性與這些參數之關係。 Streaming instability may occur in many space plasma environments. In this study, we examine the electrostatic streaming instability based on the one-dimensional electrostatic full particle numerical code. The applications include the plasma sheet boundary layer of the Earth’s magnetosphere, where the electron beams may encounter the background plasma, and the Gamma-ray burst, where high speed plasma may encounter the interstellar plasma. We vary the ratio of the beam drift velocity to the speed of light, the ratio of the beam thermal velocity to the drift velocity, and the mass ratio of the ion to electron to examine the relations between these parameters and the formation as well as the characteristics of the electrostatic solitary waves.
