Modelling of arc-electrode systems - preliminary results for high pressure xenon arc lamps

摘要

The integrated electrode-plasma models developed for 0.1 MPa argon arcs can he adapted for high pressure lamp situations, but different 1-D boundary layer models have to be used. The transition of the cathode operation mode from diffuse to constricted within a small current range can not be predicted by neglecting the cathode sheath. Additionally, further physical effects may play a role for this phenomenon, e.g. 1.the electron emission mode changing from thermionic to field enhanced. 2. deviations of electron and heavy particle temperatures (PLTE).