Power Calculations for High-Flow CO Electric Discharge Laser Systems

Smith, N. S.; Hassan, H. A.

doi:10.2514/3.61373

Cited by 18 publications

(24 citation statements)

References 44 publications

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“…), and L (in Å) is the characteristic parameter of the exponential short-range repulsive potential. The L value providing the best fit of the analytical approximation to our numerical results is equal to L = 0.23 Å (compared to L = 0.203 Å recommended in ref and L = 0.25 Å 21 ). Other parameters at T = 500 K were found to be δ VT = 0.293 and P 1,0 = 0.229 × 10 -19 cm 3 s -1 .…”

Section: Theoretical Modelingsupporting

confidence: 45%

Vibrational Energy Exchanges in Nitrogen: Application of New Rate Constants for Kinetic Modeling

et al. 2007

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The state-to-state collisional data on vibration-vibration and vibration-translation/rotation energy exchanged in N2(v)-N2(v') collisions recently obtained from accurate ab initio semiclassical calculations have been used to analyze the data measured in nitrogen under two different plasma conditions. In particular, the vibrational distribution function and the time-evolution of the gas temperature measured under post-discharge and glow discharge conditions, respectively, have been calculated and compared with the experimental observations. The theoretical analysis and the related results, generally in very good agreement with the experimental data, provide insight into the various energy-exchange mechanisms that lie behind the macroscopic behaviors of the nitrogen plasmas. In particular, the role played by the vibrationally excited nitrogen molecules in the gas kinetics is pointed out, as well as the importance of nitrogen atom production in the long time scales of the glow discharge.

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Section: Theoretical Modelingsupporting

confidence: 45%

Vibrational Energy Exchanges in Nitrogen: Application of New Rate Constants for Kinetic Modeling

et al. 2007

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“…The RCs for high vibrational levels have been found by using the extrapolation procedure. First-order perturbation theory expressions were used for the extrapolation [2][3][4][5] of measured RCs. This procedure has no strong physical background and was never verified for the calculations of VV exchange rates of highly excited CO molecules.…”

Section: Introductionmentioning

confidence: 99%

Theoretical modelling and experimental studies of the multi-quantum vibration exchange in vibrationally excited CO molecules

Ионин

Klimachev

Kotkov

et al. 2001

J. Phys. D: Appl. Phys.

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Studies of the vibration-vibration (VV) exchange in CO molecules excited up to vibration quantum numbers v = 20 have been performed both theoretically and experimentally. A new kinetic model which takes into account the multi-quantum VV exchange in the temperature range T = 100-300 K is described for the first time. A description is given of the experimental methodology allowing for studies of the effects of the relaxation of the vibrational distribution after a sudden disturbance. The disturbance of the vibrational distribution is produced by a Q-switched short pulse of single line radiation in fundamental band. The relaxation is studied by measuring the laser pulse energy of the second pulse initiated by resonator Q-switching produced with a variable time delay relative to the first pulse. A set of kinetic rate constants accepted in the model for various gas temperatures, vibration level numbers and number of exchanged vibration quanta from 1 to 4 is presented. The good agreement between the experimental data and the results of the advanced theory is the first direct evidence in support of the multi-quantum exchange model.

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“…We used for analytical calculations the modified Schwartz−Slawsky−Herzfeld (SSH) theory expressions analogous to that as in ref . In this case, both kinds of interactions, short- rangeand long-range, were taken into account.…”

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confidence: 99%

State-to-State Rate Constant Calculations for V−V Energy Transfer in CO−N₂ Collisions

2003

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Single and multiquantum vibrational relaxation of low and highly vibrationally excited levels of CO in collisions with N 2 is studied within the semiclassical coupled state method. The dynamics is followed using ab initio interaction potential for the short-range interaction and updated multipole expansions for the long range interaction. Compared to the previous study, a better agreement with the available experimental rate constants is obtained, particularly in the critical low temperature regime down to T ) 80 K. Remarkable corrections are found for rate constants for single and multiquantum transitions between highly excited CO and N 2 molecules.

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Power Calculations for High-Flow CO Electric Discharge Laser Systems

Cited by 18 publications

References 44 publications

Vibrational Energy Exchanges in Nitrogen: Application of New Rate Constants for Kinetic Modeling

Vibrational Energy Exchanges in Nitrogen: Application of New Rate Constants for Kinetic Modeling

Theoretical modelling and experimental studies of the multi-quantum vibration exchange in vibrationally excited CO molecules

State-to-State Rate Constant Calculations for V−V Energy Transfer in CO−N₂ Collisions

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Power Calculations for High-Flow CO Electric Discharge Laser Systems

Cited by 18 publications

References 44 publications

Vibrational Energy Exchanges in Nitrogen: Application of New Rate Constants for Kinetic Modeling

Vibrational Energy Exchanges in Nitrogen: Application of New Rate Constants for Kinetic Modeling

Theoretical modelling and experimental studies of the multi-quantum vibration exchange in vibrationally excited CO molecules

State-to-State Rate Constant Calculations for V−V Energy Transfer in CO−N2 Collisions

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Product

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State-to-State Rate Constant Calculations for V−V Energy Transfer in CO−N₂ Collisions