On the efficiency of emission from a plasma column in high-pressure pulse-periodic discharge in cesium

Spectral energy fluxes emerging from the surface of an axially symmetric column of inhomogeneous cesium high-pressure plasma have been calculated by direct integration of the radiation-transport equation. It is shown that, at a specified plasma temperature on the axis, irrespective of the radiation -formation mechanism and the radial distribution of the plasma parameters, the maximum energy fluxes arise when the radial optical thickness τR of the plasma column is close to unity. The asymptotic τR value, at which the discharge column radiation is the largest part of the Planck radiation, has been found.