Bestimmung des Wirkungsquerschnitts σ(Cs+→Cs) aus Sondenmessungen in einem thermischen Cs-Plasma

The ion currentI _i to a Langmuir probe was measured in a Cs-plasma which was produced by contact ionization and for which the neutral densityn _g is known and the plasma density is given by the Saha equation. Using the theory of Self and Shih the collision cross section σ(Cs⁺→Cs) was calculated from the measured ion currentI _i .