Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine

Salman Rosenwaks; Boris D. Barmashenko; Esther Bruins; Dov Furman; Victor Rybalkin; Arje Katz

doi:10.1117/12.465781

6 May 2002 Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine

Salman Rosenwaks, Boris D. Barmashenko, Esther Bruins, Dov Furman, Victor Rybalkin, Arje Katz

Author Affiliations +

Proceedings Volume 4631, Gas and Chemical Lasers and Intense Beam Applications III; (2002) https://doi.org/10.1117/12.465781
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

Spatial distributions of the gain and temperament across the flow were studied for transonic and supersonic schemes of the iodine injection in a slit nozzle supersonic chemical oxygen-iodine laser as a function of the iodine and secondary nitrogen flow rate, jet penetration parameter and gas pumping rate. The mixing efficiency for supersonic injection of iodine is found to be much larger than for transonic injection, the maximum values of the gain being approximately 0.65 percent/cm for both injection schemes. Measurements of the gain distribution as a function of the iodine molar flow rate nI₂ were carried out. For transonic injection the optimal value of nI₂ at the flow centerline is smaller than that at the off axis location. The temperature is distributed homogeneously across the flow, increasing only in the narrow boundary layers near the walls. Opening a leak downstream of the cavity in order to decease the Mach number results in a decrease of the gain and increase of the temperature. The mixing efficiency in this case is much larger than for closed leak.

Citation Download Citation

Salman Rosenwaks, Boris D. Barmashenko, Esther Bruins, Dov Furman, Victor Rybalkin, and Arje Katz "Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine", Proc. SPIE 4631, Gas and Chemical Lasers and Intense Beam Applications III, (6 May 2002); https://doi.org/10.1117/12.465781

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