Search for optical amplification of the Balmer transition in C VI using a dynamical z-pinch discharge

Using a dynamical z-pinch discharge, intense radiation of hydrogen-like carbon was produced. Operating the discharge with a maximum current of 105 kA and a period of 274 ns, the Balmer transition at 18.23 nm appeared as a short (< 8 ns FWHM) and bright (230 kW in ) peak emitted from a cylindrical volume with a radius of at the centre of the vessel. The results are compared with predictions of models for a z-pinch discharge. Optical gain for the Balmer transition was determined to be less than in agreement with the prediction of the model.