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Proceedings Paper

Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine
Author(s): Salman Rosenwaks; Boris D. Barmashenko; Esther Bruins; Dov Furman; Victor Rybalkin; Arje Katz
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Paper 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.

Paper Details

Date Published: 6 May 2002
PDF: 11 pages
Proc. SPIE 4631, Gas and Chemical Lasers and Intense Beam Applications III, (6 May 2002); doi: 10.1117/12.465781
Show Author Affiliations
Salman Rosenwaks, Ben-Gurion Univ. of the Negev (Israel)
Boris D. Barmashenko, Ben-Gurion Univ. of the Negev (Israel)
Esther Bruins, Ben-Gurion Univ. of the Negev (Israel)
Dov Furman, Ben-Gurion Univ. of the Negev (Israel)
Victor Rybalkin, Ben-Gurion Univ. of the Negev (Israel)
Arje Katz, Ben-Gurion Univ. of the Negev (Israel)


Published in SPIE Proceedings Vol. 4631:
Gas and Chemical Lasers and Intense Beam Applications III
Steven J. Davis; Michael C. Heaven, Editor(s)

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