Experiments and modeling of supersonic COILs

Salman Rosenwaks, Karol Waichman, Arye Katz, Zadok Dahan, Ilan Brami-Rosilio, Boris D. Barmashenko

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Preliminary experiments and extensive modeling of supersonic chemical oxygen-iodine lasers (COILs) are reported. A 10-cm gain-length device is studied and both the gain and the power are measured as a function of flow rates and densities of the reactive species and of the output coupling. The mechanism of I2 dissociation in supersonic COILs is studied applying a kinetic-fluid dynamics model, where pathways involving the excited species I2(X1Σ+g,10≤v<25) , I2(X1Σ+g,25≤v<47) , I2(A′ 3Π2u),I2(A 3Π1u),O2(X 3Σ -g,v),O2(a1Δ, g,v),O2(b 1Σ+g,v) I(2P1/2) as intermediate reactants are included. The gist of the model is adding the first reactant and reducing the contribution of the second as compared to previous models. These changes, recently suggested by V. N. Azyazov et al., J. Chem. Phys. 130, 104306 (2009), significantly improve the agreement with the measurements of the gain in a low pressure supersonic COIL for all I2 flow rates that have been tested in the experiments. In particular, the lack of agreement for high I2 flow rates, which was encountered in previous models, has been eliminated in the present model. It is suggested that future modeling of the COIL operation should take into account the proposed contribution of the above mentioned reactants.

Original languageEnglish
Title of host publication40th AIAA Plasmadynamics and Lasers Conference
StatePublished - 1 Dec 2009
Event40th AIAA Plasmadynamics and Lasers Conference - San Antonio, TX, United States
Duration: 22 Jun 200925 Jun 2009

Publication series

Name40th AIAA Plasmadynamics and Lasers Conference


Conference40th AIAA Plasmadynamics and Lasers Conference
Country/TerritoryUnited States
CitySan Antonio, TX

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


Dive into the research topics of 'Experiments and modeling of supersonic COILs'. Together they form a unique fingerprint.

Cite this