阿おもね尔文波は

阿おもね尔文波は，又また称たたえ剪切阿おもね尔文波は，是ぜ等とう离子体たい中なか的てき一いち种沿磁场方向ほうこう传播的てき波なみ，这种波は的てき频率远低于等离子体たい的てき回旋かいせん频率，是ぜ一いち种线偏振ふ的てき低てい频横波よこなみ。处在磁场中ちゅう的てき导电流体りゅうたい在ざい垂直すいちょく于磁场的方かた向上こうじょう受到局部きょくぶ扰动时，沿着磁感线方向ほうこう的てき磁张力りょく提供ていきょう恢复力りょく，就会激げき发阿尔文波は。阿おもね尔文波は是ぜ由よし瑞みず典てん物理ぶつり学がく家か汉尼斯·阿おもね尔文首くび先さき预言的てき，因いん此得名めい。后きさき来らい隆德たかのり奎斯特とく（Lundquist）使用しよう1特とく斯拉左右さゆう的てき磁场在ざい水みず银中观察到了りょう阿おもね尔文波は，列れつ纳尔特とく（Lehnert）使用しよう液えき态钠也证实了阿おもね尔文波は的てき存在そんざい。

运动的てき阿おもね尔文波は。

A cluster of double layers forming in an Alfvén wave, about a sixth of the distance from the left.
图例:
红色=electrons
绿色=ions
黄色おうしょく=electric potential
橙色だいだいいろ=parallel electric field
粉こな色しょく=charge density
蓝色=magnetic field

阿おもね尔文波は的てき色いろ散ち关系为：

$\omega ^{2}=k^{2}v_{A}^{2}\cos ^{2}\theta$

这样的てき波なみ称しょう为斜阿おもね尔文波は。θしーた=0时是沿着磁感线的方向ほうこう传播的てき，称しょう为阿尔文波は。此时阿尔文波は的てき相あい速度そくど为：

$v_{A}={\frac {B}{\sqrt {\mu _{0}\rho _{0}}}}$

称しょう为阿おもね尔文速度そくど，其中μみゅー₀是ぜ等とう离子体たい的てき磁导率りつ，ρろー₀是ぜ离子的てき密度みつど。在ざい垂直すいちょく于磁感かん线的方向ほうこう上じょう阿おもね尔文波は不能ふのう传播。

阿おもね尔文时间

在ざい等とう离子体たい物理ぶつり中なか, 阿おもね尔文时间$\tau _{A}$是ぜ波は动现象ぞう的てき一いち个重要よう时标。它和阿おもね尔文速度そくど的てき关系为：

$\tau _{A}={\frac {a}{v_{A}}}$

式しき中ちゅう$a$ 代表だいひょう了りょう系けい统的特とく征せい尺度しゃくど。例れい如，$a$ 是これ托たく卡马克かつ中ちゅう较小的てき环的半径はんけい。

参まいり见

• 压缩阿尔文波は

延伸えんしん阅读

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