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A Brief Introduction to Space Plasma Physics.pdf - Institute of ...

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1<br />

2<br />

2<br />

C ⎛ B ⎞<br />

A ⎜ ⎟<br />

⎝ µ<br />

0<br />

ρ ⎠<br />

• The most general solution is b = b( z ± C t ) . This is a<br />

where = ⎜ ⎟ is called the Alfvén velocity.<br />

disturbance propagating along magnetic field lines at the<br />

Alfvén velocity.<br />

2<br />

∂ b<br />

2<br />

∂t<br />

=<br />

C<br />

∂<br />

u<br />

2<br />

2<br />

A 2<br />

∂z<br />

A

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