标题：Active Experiment with a Rocket-Borne High Power Electron Gun (c. Wave-Particle Interactions in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I)
其他标题：ロケット搭載大出力電子銃装置を用いたActive Experiment(c.磁気圏内の波動粒子相互作用)(第2回極域における電離圏磁気圏総合観測シンポジウム : Part I)
摘要：High power electron beam experiments have been performed by sounding rockets, and the spacecraft charging due to beam emission has been investigated. The charging effect was found to be considerably depressed by the extra ionization effect around the spacecraft due to collisions between the high power electron beam and the neutral gas.
