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Collisionality: Difference between revisions
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(Created page with 'In a plasma, the collision time ''τ<sub>coll</sub>'' is defined as the time in which the trajectory of a (charged) particle undergoes a change of direction of 90 degrees. Due…') |
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<ref>K. Miyamoto, ''Plasma Physics and Controlled Nuclear Fusion'', Springer-Verlag (2005) ISBN 3540242171</ref> | <ref>K. Miyamoto, ''Plasma Physics and Controlled Nuclear Fusion'', Springer-Verlag (2005) ISBN 3540242171</ref> | ||
:<math>\nu = \left ( \frac{qq*n*}{\varepsilon_0 m}\right )^2 \frac{\ln \Lambda}{4\pi (m_r/m)v^3n*}</math> | :<math>\nu = \left ( \frac{qq^*n^*}{\varepsilon_0 m}\right )^2 \frac{\ln \Lambda}{4\pi (m_r/m)v^3n^*}</math> | ||
assuming ''v > v*'', where ''m<sub>r</sub> = mm*/(m+m*)'' is the reduced mass and ''n*'' the bulk particle density. | assuming ''v > v*'', where ''m<sub>r</sub> = mm*/(m+m*)'' is the reduced mass and ''n*'' the bulk particle density. | ||