为什么电子漂移范艾伦带向东?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 06 - t23:24:05z //www.hoelymoley.com/feeds/question/22911 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/22911 4 为什么电子漂移范艾伦带向东? “。 //www.hoelymoley.com/users/24546 2021 - 09 - 29 - t15:59:08z 2021 - 10 - 04 - t00:28:06z < h2 > < / h2 > < p >背景下图显示的三个粒子运动模式的辐射粒子的范艾伦辐射带中捕获一个纵向漂移运动:< a href = " https://i.stack.imgur.com/xzeAk.png " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/xzeAk.png " alt = "在这里输入图像描述" / > < / >但我经历一些困难理解是什么导致这个运动,和大多数来源我看看简单的这种运动状态存在,或在详细分析如这个运动的大小没有解释原因。< / p > < h2 > < / h2 > < p >问题因此我想问:< em >是什么导致质子捕获向西漂移的范艾伦辐射带吗?< / em > < / p > < h2 > < / h2 > < p >假设我想也许洛伦兹力w.r.t.行星际磁场(IMF)和(半)循环(跳跃)地球周围运动可能会导致这个漂移,但我遇到一些困难在确认/拒绝这一假设。< a href = " https://i.stack.imgur.com/2e85X.png " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/2e85X.png " alt = "在这里输入图像描述" / > < / > < / p > //www.hoelymoley.com/questions/22911/-/22935 # 22935 3 由AtmosphericPrisonEscape回答为什么电子漂移范艾伦带向东? AtmosphericPrisonEscape //www.hoelymoley.com/users/489 2021 - 10 - 04 - t00:28:06z 2021 - 10 - 04 - t00:28:06z < p >你看< span class = " math-container " > \微分算符\ vec B美元< / span >漂移(口语:grad-E漂移)。< / p > < p >这种类型的运动可以解释在一个简化的方式,想象一个二维平面时,y = 0,分开两个不同的磁场强度,< span class = " math-container " >说是< / span >美元。Let us say that for y>0, $\rm B_z$ is large and for y<0, $\rm B_z$ is weak. The strong field imparts a small gyro-radius for the charged particles, while the weak field imparts a large gyro-radius. Positive and negative charges orbit in opposite directions in the field, hence along the field gradients, they tend to drift left and right. This type of drift therefore can lead to net charge separation, which results in an E-field, which again leads to $\rm \vec E\times \vec B$-drift, which is uniform in direction for both charges.

This is somewhat illustrated in this lecture, part 2.3. There are other types of drift motions, but the aforementioned two are usually all covered in introductory lectures to plasma physics. Another good one is here.

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