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Electron-vibration energy exchange models in nitrogen-containing plasma flows.
1Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom. v.laporta@ucl.ac.uk
The Journal of Chemical Physics
|March 22, 2013
Summary
This study examines vibrational kinetics in nitrogen plasma, analyzing energy relaxation and distribution functions using electron-impact data. Results aid in developing accurate reduced models for plasma physics.
Area of Science:
- Plasma Physics
- Chemical Physics
- Atomic and Molecular Physics
Background:
- Nitrogen plasma is crucial in various industrial and scientific applications.
- Understanding vibrational kinetics is key to controlling plasma properties.
- Electron-impact excitation significantly influences vibrational energy transfer.
Purpose of the Study:
- To investigate the physics of vibrational kinetics in nitrogen-containing plasma.
- To analyze the temporal relaxation of vibrational energy and distribution functions.
- To evaluate the accuracy of reduced models and relaxation time formalisms.
Main Methods:
- State-to-state approach for analyzing vibrational kinetics.
- Utilizing recently derived cross sections and rate coefficients for electron-impact excitation.
- Varying electron and vibrational temperatures from 0 to 50,000 K.
Main Results:
- Detailed analysis of vibrational energy relaxation dynamics.
- Characterization of vibrational distribution function evolution.
- Provided an analytical fit for vibrational relaxation time.
Conclusions:
- Findings support the derivation of more accurate reduced models for nitrogen plasma.
- The study assesses the validity and limitations of the relaxation time formalism.
- Offers insights into optimizing plasma processes through kinetic control.
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