The performance of a small-scale KE-CVL operating at a pulse repetition rate of 50kHz has been investigated by comparing modelling results and experimental data to understand the underlying plasma kinetics issues for pulse repetition rate scaling. Comparison between initial modelling predictions and experimental results relating to the laser output power and the population densities of the metastable lower laser levels (Cu* 4s22D3/2,5/2) suggests that there is an additional de-excitation mechanism for the metastables in the KE-CVL. The most likely de-excitation mechanism involves vibrationally-excited H2(v) molecules Cu*2D+H2(v) => CuH+H. A rate-coefficient of 2×10-16m3s-1 is obtained by comparing modelling results with experimental data relating to the laser output power and the time-evolution of the axial 2D3/2 metastable population density.
|Number of pages||4|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|Publication status||Published - 2001|