Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 81, Issue 2, Pages 311-315Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-005-3229-x
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The use of supersonic nozzles for the driver nitrogen in an ejector nozzle bank (ENB) for chemical-oxygen iodine laser (COIL) resulted in the elimination of the chocking effect for the primary oxygen flow and formation of a low temperature gain medium. The ENB generates a supersonic gain medium with a Mach number greater than 2.2, and a temperature less than 200 K. The potential recovered pressure was 90 Torr with a small signal gain greater than 10(-2) cm(-1). With a 5 cm gain length for this nozzle, the output power was 1.2 kW with a chemical efficiency of 23.4%. A strong decay of I(P-2(1/2)) emission, (concentration), along the gain medium flow was observed .
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