2005 I 3
From QED
We have:
Writing the last two terms, with , :
The :
So comparing with the term, the latter term will be negligible if:
Or:
So the condition is that:
The second term will be negligible if:
Or:
So the term is negligible if:
Along magnetic field lines, the scale length will be λmfp = vT / ν. The relevant collision frequency will be self-collisions (with the like species). The relevant time scale will be ν. Then:
The ratio is then:
This page was recovered in October 2009 from the Plasmagicians page on Generals_2005_I_3 dated 20:23, 15 May 2007.