Observation of high transient gain in the germanium x-ray laser at 19.6 nm

The transient-excitation pumping scheme, in which a picosecond duration pulse rapidly heats the plasma preformed by a low-intensity nanosecond pulse, was used to pump the Ne-like germanium, J = 0-1 transition at 19.6 nm. A small-signal gain coefficient of 30 cm(-1) was measured for targets less than or equal to 5 mm long. (C) 1998 Optical Society of America.

La ofensiva cinematográfica de la URSS en la guerra civil española

This article explores Soviet cinema and the Spanish Civil War, 1936-1939. The article focuses on three separate components of Moscow’s cinematic operations vis-à-vis the Spanish imbroglio: 1.) the distribution of Soviet-made feature films in the Loyalist zone, 2.) the production of Soviet propaganda newsreels on Spanish subjects intended for distribution within the Soviet Union, and 3.) the significance of the Spanish war for Soviet cinema throughout the balance of the Bolshevik period. The narrative and conclusions herein are supported by new research from archives in both Spain and the Russian Federation, as well as analyses of films rarely if ever discussed in the scholarly literature, either within film studies or twentieth century European history.