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专利名称：Method and apparatus for injecting gas into
a laser cavity
发明人：Joel M. Avidor,Charles J. Knight申请号：US05/6946申请日：19780417公开号：US041901A公开日：19800401
摘要：Laser gas injected into a multiple-pulsed electric discharge laser (EDL) must beremoved as quickly as possible following each laser pulse. This `clearing time` can limitthe average laser output power. Fast, efficient mass transport is needed and it, in turn,requires the establishment of a uniform velocity flowfield. Such a uniform flowfield can beestablished by injecting the laser gas through arrays of porous tubes formed witheccentric walls tailored in wall thickness to introduce a non-uniform injection velocityaround the circumference of each tube. Preferably, the tubes have a cross-sectionalshape formed of displaced circular inner and outer contours to provide a progressivelythickening wall. Tailoring is designed to establish an optimum, non-uniform injectionvelocity distribution capable of producing a nearly irrotational flow that rapidly developsinto a uniform flowfield downstream of the tube array. Because of the enhanced heattransfer characteristics of the porous tubes, a beneficially uniform gas temperature alsois maintained to assure good optical medium homogeneity.
申请人：U S OF AMERICA NAVY SECRETARY
代理人：Richard S. Sciascia,Paul N. Critchlow
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