Theoretical modeling of iodine dissociation in coils

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1 Scopus citations


The losses of O2(1Δ) during iodine dissociation in the chemical oxygen iodine laser (COIL) are shown to be one of the main factors affecting the lasing power. Analytical expression is obtained for the number of O2(1Δ) molecules, N, lost in the region of 12 dissociation per one molecule of I2. This expression yields N = 5 - 7, in agreement with numerical calculations and experimental measurements. It is shown that some effective number N1 < N should be used instead of N to calculate the lasing power. Analytical expression for the lasing power is obtained taking into account the O2(1Δ) losses in the dissociation region. It is shown that N increases and the power decreases when the dissociation fraction F is increased. Therefore maximum power is achieved at low values of the iodine flow rate when iodine is not completely dissociated before the resonator and the small signal gain in the resonator region is less than the maximum gain. Numerical modeling of the RADTCL (the supersonic COIL developed in Phillips Laboratory) is performed. The values of the rate constants of the reactions responsible for iodine dissociation are specified to reach an agreement between the calculated and measured dependences of the power on the iodine flow rate.

Original languageEnglish
StatePublished - 1 Jan 1995
Event26th Plasmadynamics and Lasers Conference, 1995 - San Diego, United States
Duration: 19 Jun 199522 Jun 1995


Conference26th Plasmadynamics and Lasers Conference, 1995
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • General Engineering


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