I - Coherence Effects in Penning Ionization, II - Volume Recombination Processes at High Pressures.
Technical rept. no. 12, Dec 77-Dec 78,
Pagination or Media Count:
A thermal energy beam source of rare gas metastable atoms He,Ne,Ar has been designed and constructed. These low energy high flux beams have been used to excite ions of the Group II metal atoms in Penning ionizing collisions. We find that optical emission from the excited ions is linearly polarized along the beam axis. This non-statistical population of the ml states of the excited ion is a sensitive measure of the interaction between the reactants of the Penning collision process. We have also examined kinetic processes related to volume recombination of electrons and ions in the afterglow of a laser initiated discharge in a mixture of potassium atoms in a high pressure buffer of Krypton. Time dependent optical emission from excited states populated in the afterglow of an ionizing laser pulse is utilized to determine electron temperatures and densities. The electron energy loss rate can then be determined. Author
- Plasma Physics and Magnetohydrodynamics