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

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

igpp.ucla.edu
from igpp.ucla.edu More from this publisher
10.02.2014 Views

B r • The force is along and away from the direction of increasing B. • Since E = 0 and kinetic energy must be conserved 1 2 1 2 2 2 mv = 2 m( v + v⊥) a decrease in v must yield an increase in v⊥ • Particles will turn around when B = 1 mv 2 2 µ

• The second adiabatic invariant – The integral of the parallel momentum over one complete bounce between mirrors is constant (as long as B doesn’t change much in a bounce). J = ∫ s s 1 2 2mv ds = const. – Using conservation of energy and the first adiabatic invariant J = ∫ s s 1 2 B 2 2mv(1 − ) 1 ds B here B m is the magnetic field at the mirror point. m = const.

B r<br />

• The force is along and away from the direction <strong>of</strong><br />

increasing B.<br />

• Since E = 0 and kinetic energy must be conserved<br />

1 2 1 2 2<br />

2<br />

mv =<br />

2<br />

m(<br />

v + v⊥)<br />

a decrease in v must yield an increase in v⊥<br />

• Particles will turn around when<br />

B =<br />

1<br />

mv<br />

2<br />

2<br />

µ

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!