Abstract

Experiments underway at NRL are directed towards utilization of laser-heated ultra-thin foils for generating elongated (6 and 12 mm length) plasmas of sufficient uniformity to produce significant amplification on optical transitions in highly ionized atoms in the Fe to Se range. The NRL Pharos III laser operating at 300-600 J and 4 ns is used as a driver. The immediate programmatic emphasis is towards an increased understanding of the physics of the apparently preferential pumping of particular 3p levels in neon-like ions [1]. Also of interest is the role played by supporting hydrocarbon substrates and the mutual interaction between the layers as to effects on lasing in either medium. Results from current experiments with targets consisting of copper and selenium coatings on formvar substrates will be reported.

© 1986 Optical Society of America