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

S. Rosenwaks; B. D. Barmashenko; E. Bruins; D. Furman; V. Rybalkin; A. Katz

doi:10.1117/12.465781

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

S. Rosenwaks, B. D. Barmashenko, E. Bruins, D. Furman, V. Rybalkin, A. Katz

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

8 Scopus citations

Abstract

Spatial distributions of the gain and temperature 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 (∼ 0.85) is found to be much larger than for transonic injection (∼ 0.5), the maximum values of the gain being ∼ 0.65%/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 decrease the Mach number results in a decrease of the gain and increase of the temperature. The mixing efficiency in this case (∼ 0.8) is much larger than for closed leak.

Original language	English
Pages (from-to)	23-33
Number of pages	11
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4631
DOIs	https://doi.org/10.1117/12.465781
State	Published - 1 Jan 2002
Event	Gas and Chemical Lasers and Intense Beam Applications III - San Jose, United States Duration: 22 Jan 2002 → 24 Jan 2002

Keywords

Chemical lasers
Iodine
Oxygen
Power lasers

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.465781

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

abstract = "Spatial distributions of the gain and temperature 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 (∼ 0.85) is found to be much larger than for transonic injection (∼ 0.5), the maximum values of the gain being ∼ 0.65%/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 decrease the Mach number results in a decrease of the gain and increase of the temperature. The mixing efficiency in this case (∼ 0.8) is much larger than for closed leak.",

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Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine. / Rosenwaks, S.; Barmashenko, B. D.; Bruins, E. et al.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4631, 01.01.2002, p. 23-33.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Gain and temperature in a slit nozzle supersonic chemical oxygen-iodine laser with transonic and supersonic injection of iodine

AU - Rosenwaks, S.

AU - Barmashenko, B. D.

AU - Bruins, E.

AU - Furman, D.

AU - Rybalkin, V.

AU - Katz, A.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Spatial distributions of the gain and temperature 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 (∼ 0.85) is found to be much larger than for transonic injection (∼ 0.5), the maximum values of the gain being ∼ 0.65%/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 decrease the Mach number results in a decrease of the gain and increase of the temperature. The mixing efficiency in this case (∼ 0.8) is much larger than for closed leak.

AB - Spatial distributions of the gain and temperature 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 (∼ 0.85) is found to be much larger than for transonic injection (∼ 0.5), the maximum values of the gain being ∼ 0.65%/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 decrease the Mach number results in a decrease of the gain and increase of the temperature. The mixing efficiency in this case (∼ 0.8) is much larger than for closed leak.

KW - Chemical lasers

KW - Iodine

KW - Oxygen

KW - Power lasers

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Gas and Chemical Lasers and Intense Beam Applications III

Y2 - 22 January 2002 through 24 January 2002

ER -

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

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