@article{oai:nipr.repo.nii.ac.jp:00008026,
 author = {大家, 寛 and OYA, Hiroshi},
 journal = {南極資料},
 month = {Feb},
 note = {P(論文), 電離圏および磁気圏において複雑に展開している波動粒子相互作用は,静電的プラスマ波動から電磁波動に至る広大なプラスマ波動の全域にわたるω-k図の中に,それぞれの波動粒子相互作用を位置づけることによって整理することがてきる.この整理は,ますω/Ω_e (Ω_eは電子サイクロトロン角周波数)とΩ_eおよひπ_e (πeはよプラスマ角周波数)といった二つの鍵をもって行われるが,電離層,プラスマ圏,およひ磁気圏にわたって,三つの重要な波動粒子相互作用のチャンネルか存在する.すなわち,1) π_e<ω<√<π_e^2+Ω_e^2 2) Ω_e/2くωくΩ_eおよび3) ω&sime;Ω_<LHR>(Ω_<LHR>は低域ハイフリット周波数)である.こうした三つのチャンネルを通して言える重要な事柄は,磁気圏に豊富に存在している,比較的低工ネルギーの粒子成分か静電的プラスマ波動を生成することが,プラスマ波動生成の本質を作っていることである.これは,宇宙空間のプラスマ波動が100keV以上の範囲の高工ネルキ一粒子によって面接生成されるとする従来の考え方を本質的に変えてゆく., Wave-particle interactions that are important processes for the control of the electromagnetic states in the earth's magnetosphere are surveyed relatingto the auroral zone that is the most suitable window to clarify the various aspects of wave-particle interactions. The wave-particle interactions are classified using two-dimensional keys ; the first is the plasma parameter and the second is the frequency normalized by the electron cyclotron frequency. The plasma parameter is directly related to the place, such as ionosphere. plasmasphere, plasmapause and magnetosphere. The frequency normalized by the electron cyclotron frequency at a given region becomes a useful tool for analyses of the fundamental process of the wave generation both for the beam-wave instability or the other instability due to non Maxwellian type velocity distribution of the particles. Three channels are important for the generation of the plasma waves such as 1) between the plasma frequency and the upper hybrid resonance frequency, 2) between half electron cyclotron frequency and exact electron cyclotron frequency, and 3) near the lower hybrid resonance frequency. These channels largely contribute to the generation of the plasma waves and also wave-particle interactions relating to the electrostatic mode that produces strong interaction even with the low energy particles that occupy the majority of the population in the earth's magnetosphere. This evidence gives a revolutionary change to the old concept of wave particle interaction that has been concentrated only to the wave-particle interaction between the electromagnetic waves and the high energetic particles with energy larger than several tens keV.},
 pages = {1--17},
 title = {電離圏・磁気圏における波動粒子相互作用},
 volume = {64},
 year = {1979},
 yomi = {オオヤ, ヒロシ}
}