The influence of the buffer gases on the discharge homogeneity of F2doped excimer laser gas mixtures is investigated in a small x-ray preionised high-pressure discharge chamber. The spatial and temporal development of discharges in He/F2 and Ne/F2 gas mixtures is monitored via its fluorescence using an intensified CCD camera with a gating time of 300 ps. The formation and development of discharge filaments in He/F2 gas mixtures is completely different from that in Ne/F2. Under the same start up conditions, discharges in Ne/F2 are dominated by cathode hotspots where as no hot spots are visible in discharges in He/F2 gas mixtures. However, the discharges in Ne/F2 gas mixtures appear to be more uniform even though the discharge width decreases in time and hotspots are persistent on the cathode surface.
|Name||Proceedings of SPIE|
|Conference||Lasers and Applications 2005|
|Period||28/08/05 → 2/09/05|
|Other||28 August - 2 September 2005|