Title :
Volumetric UV photo-ionization in co laser media
Author_Institution :
Westinghouse Res. Labs., Pittsburgh, PA, USA
Abstract :
Self-sustained discharges initiated by UV volume photo-ionization are an excellent means of pumping pulsed, high-power lasers. As a pre-requisite to understanding the scaling of uniform discharges to large volume, photo-electron generation from a bare spark source was measured versus source distance (2-22 cm), gas composition and pressure (0.2-1 atm), peak spark current (10-1200 amp), spark supply energy (0.0125-2.5 Joules), and spark duration (0.02-40 μs). As a result, the controlling physical mechanisms are now sufficiently understood to specify the initial electron distribution produced by an array of spark sources in an arbitrary CO2, N2. He discharge volume.
Keywords :
gas lasers; optical pumping; photoionisation; sparks; CO2 laser media; current 10 A to 1200 A; discharge volume; electron distribution; energy 0.0125 J to 2.5 J; gas composition; peak spark current; photoelectron generation; physical mechanisms control; pressure 0.2 atm to 1 atm; pumping pulsed high-power lasers; self-sustained discharges; source distance; spark duration; spark sources array; spark supply energy; time 0.02 mus to 40 mus; uniform discharges scaling; volumetric UV photoionization; Abstracts; Gas lasers; Helium; Measurement by laser beam; Photonics; Pollution measurement; Surface emitting lasers;
Conference_Titel :
Electron Devices Meeting (IEDM), 1974 International
Conference_Location :
Washington, DC
DOI :
10.1109/IEDM.1974.6219656
