TY - GEN
T1 - A historical overview on the mechanism of the COIL kinetics
AU - Rosenwaks, Salman
AU - Barmashenko, Boris D.
AU - Waichman, Karol
PY - 2010/12/1
Y1 - 2010/12/1
N2 - The kinetics of the chemical oxygen-iodine laser (COIL) has been studied alongside the technological efforts in COIL development. In particular, many efforts have been devoted to the study of the mechanism of I2 dissociation in the COIL medium. Since O2(a) is the energy reservoir of the COIL, it must be involved in the dissociation of I2. Therefore, understanding the dissociation mechanism may help in finding ways of minimizing the O2(a) consumption for dissociation and increasing the chemical efficiency of the laser. In the present paper previously suggested mechanisms of I2 dissociation are briefly overviewed and recent measurements and modeling of the gain and the power in supersonic COILs carried out in our laboratory are presented. Our studies employ both an analytical model and numerical calculations which are outlined in the present paper, with more details on the models given in a following paper by Barmashenko et al. To unravel the I2 dissociation mechanism we utilize kinetic-fluid dynamics three-dimensional modeling, where pathways involving the excited species I2(X, 10 ≤ v < 25), I2(X, 25 ≤ v ≤ 47), I2(A, A'), O2(X, v), O2(a, v), O 2(b, v) and I(2P1/2) as intermediate reactants are included. Both the gain and the power studies show good agreement between calculations and experiments. We believe that future modeling should include the above pathways and additional pathways should be considered when additional kinetic data is available.
AB - The kinetics of the chemical oxygen-iodine laser (COIL) has been studied alongside the technological efforts in COIL development. In particular, many efforts have been devoted to the study of the mechanism of I2 dissociation in the COIL medium. Since O2(a) is the energy reservoir of the COIL, it must be involved in the dissociation of I2. Therefore, understanding the dissociation mechanism may help in finding ways of minimizing the O2(a) consumption for dissociation and increasing the chemical efficiency of the laser. In the present paper previously suggested mechanisms of I2 dissociation are briefly overviewed and recent measurements and modeling of the gain and the power in supersonic COILs carried out in our laboratory are presented. Our studies employ both an analytical model and numerical calculations which are outlined in the present paper, with more details on the models given in a following paper by Barmashenko et al. To unravel the I2 dissociation mechanism we utilize kinetic-fluid dynamics three-dimensional modeling, where pathways involving the excited species I2(X, 10 ≤ v < 25), I2(X, 25 ≤ v ≤ 47), I2(A, A'), O2(X, v), O2(a, v), O 2(b, v) and I(2P1/2) as intermediate reactants are included. Both the gain and the power studies show good agreement between calculations and experiments. We believe that future modeling should include the above pathways and additional pathways should be considered when additional kinetic data is available.
KW - COIL
KW - chemical oxygen-iodine lasers
KW - iodine dissociation
UR - http://www.scopus.com/inward/record.url?scp=79953233453&partnerID=8YFLogxK
U2 - 10.1117/12.878600
DO - 10.1117/12.878600
M3 - Conference contribution
AN - SCOPUS:79953233453
SN - 9780819482426
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
T2 - 18th International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Y2 - 30 August 2010 through 3 September 2010
ER -
