Determination of spatially- and time-resolved electron temperature in nanosecond pulsed longitudinal discharge used for excitation of powerful gas discharge lasers

Determination of space-time resolved electron temperature in nanosecond pulsed longitudinal discharge in various noble gases and discharge tube constructions

“…Electric power density ξq V deposited for electrons heating was 2,0 W cm -3 for the first discharge tube (DUV Cu + Ne-CuBr and NIR Cu + He-CuBr lasers) and 0,2 W cm -3 for the second discharge tube (MIR He-SrBr 2 laser), as was found in [6]. …”

“…Assuming that the electron temperature varied only in the radial direction and using the experimental results obtained for the space-time averaged electron temperature, a simple method based on the analytical solution of the steady-state heat conduction equation for electrons was developed for uniform and non-uniform power input in NPLD in He, Ne and Ne-He mixtures [6]. The electronic thermal conductivity was determined from the Wiedemann-Franz law is a constant, k b is the Boltzmann constant, and e is the electron charge, and assuming that σ is independent of the spatial coordinates and had a value of σ .…”