Small-signal gain and iodine dissociation in a supersonic chemical oxygen-iodine laser with transonic injection of iodine

D. Furman; E. Bruins; B. D. Barmashenko; S. Rosenwaks

doi:10.1063/1.124072

Small-signal gain and iodine dissociation in a supersonic chemical oxygen-iodine laser with transonic injection of iodine

D. Furman, E. Bruins, B. D. Barmashenko, S. Rosenwaks

Department of Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

Measurements of the gain and temperature in the resonator of a supersonic chemical oxygen-iodine laser (COIL) with transonic injection of I₂, using diode laser-based diagnostics, are reported. For conditions corresponding to the maximum chemical efficiency of this type of COIL (11.7 mmole/s of chlorine, no primary buffer gas, and 1.36 mmole/s of the secondary N₂), the gain is a nonmonotonous function of the iodine flow rate. Maximum gain of 0.34%/cm is achieved for an iodine flow rate of 0.27 mmole/s. An analytical method is developed which enables the use of these dependencies for calculation of the iodine dissociation fraction F and the number N of O₂(¹Δ) molecules lost in the region of iodine dissociation per I₂ molecule. It is found that F is a nonmonotonous function of the iodine flow rate, its maximum value being small (0.55).

Original language	English
Pages (from-to)	3093-3095
Number of pages	3
Journal	Applied Physics Letters
Volume	74
Issue number	21
DOIs	https://doi.org/10.1063/1.124072
State	Published - 24 May 1999

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.124072

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title = "Small-signal gain and iodine dissociation in a supersonic chemical oxygen-iodine laser with transonic injection of iodine",

abstract = "Measurements of the gain and temperature in the resonator of a supersonic chemical oxygen-iodine laser (COIL) with transonic injection of I2, using diode laser-based diagnostics, are reported. For conditions corresponding to the maximum chemical efficiency of this type of COIL (11.7 mmole/s of chlorine, no primary buffer gas, and 1.36 mmole/s of the secondary N2), the gain is a nonmonotonous function of the iodine flow rate. Maximum gain of 0.34%/cm is achieved for an iodine flow rate of 0.27 mmole/s. An analytical method is developed which enables the use of these dependencies for calculation of the iodine dissociation fraction F and the number N of O2(1Δ) molecules lost in the region of iodine dissociation per I2 molecule. It is found that F is a nonmonotonous function of the iodine flow rate, its maximum value being small (0.55).",

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T1 - Small-signal gain and iodine dissociation in a supersonic chemical oxygen-iodine laser with transonic injection of iodine

AU - Furman, D.

AU - Bruins, E.

AU - Barmashenko, B. D.

AU - Rosenwaks, S.

PY - 1999/5/24

Y1 - 1999/5/24

N2 - Measurements of the gain and temperature in the resonator of a supersonic chemical oxygen-iodine laser (COIL) with transonic injection of I2, using diode laser-based diagnostics, are reported. For conditions corresponding to the maximum chemical efficiency of this type of COIL (11.7 mmole/s of chlorine, no primary buffer gas, and 1.36 mmole/s of the secondary N2), the gain is a nonmonotonous function of the iodine flow rate. Maximum gain of 0.34%/cm is achieved for an iodine flow rate of 0.27 mmole/s. An analytical method is developed which enables the use of these dependencies for calculation of the iodine dissociation fraction F and the number N of O2(1Δ) molecules lost in the region of iodine dissociation per I2 molecule. It is found that F is a nonmonotonous function of the iodine flow rate, its maximum value being small (0.55).

AB - Measurements of the gain and temperature in the resonator of a supersonic chemical oxygen-iodine laser (COIL) with transonic injection of I2, using diode laser-based diagnostics, are reported. For conditions corresponding to the maximum chemical efficiency of this type of COIL (11.7 mmole/s of chlorine, no primary buffer gas, and 1.36 mmole/s of the secondary N2), the gain is a nonmonotonous function of the iodine flow rate. Maximum gain of 0.34%/cm is achieved for an iodine flow rate of 0.27 mmole/s. An analytical method is developed which enables the use of these dependencies for calculation of the iodine dissociation fraction F and the number N of O2(1Δ) molecules lost in the region of iodine dissociation per I2 molecule. It is found that F is a nonmonotonous function of the iodine flow rate, its maximum value being small (0.55).

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Small-signal gain and iodine dissociation in a supersonic chemical oxygen-iodine laser with transonic injection of iodine

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