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Chapter 2 Laser and Atom Interaction

Chapter 2 Laser and Atom Interaction. 2.1 Planck Radiation and Einstein A and B. Maxwell Equations. Energy Density and Flux of EM Wave. Metal Cavity with Length L. Probability Distribution. Partition Function. Average energy per mode. We obtain Planck Energy Distribution.

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Chapter 2 Laser and Atom Interaction

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  1. Chapter 2 Laser and Atom Interaction

  2. 2.1 Planck Radiation and Einstein A and B Maxwell Equations Energy Density and Flux of EM Wave

  3. Metal Cavity with Length L Probability Distribution Partition Function

  4. Average energy per mode We obtain Planck Energy Distribution

  5. Einstein A and B Coefficients If you know A21 or B12, you can obtain A21, B12, B21.

  6. 2.2 Photo-Excitation

  7. Radial Wave Functions SphericalHarmonics

  8. No Perturbation With Perturbation 1

  9. Dipole Approximation

  10. Oscillator strength Sum Rule

  11. Spectral Cross Section (m2s-1) Assume Lorentz Line Profile Absorption Emission

  12. Atomic Processes

  13. 2.3 Photo-ionization Differential Cross-section from a bound S-state where Total Cross-section from a bound S-state Differential Cross-section from a bound P-state (l=1, m=-1,0,+1) No angular dependence Total Cross-section from a bound P-state

  14. Photo-absorption Cross Section from K and L Shells of Fe

  15. Important relation Scatterings Compton Scatt. Thomson Scatt.

  16. 2.4 Electron Impact Excitation

  17. 2.5 Electron Impact Ionization

  18. 2.6 Detail Balance 2 s12 s21 1 Assume LTE (Local Thermodynamic Equilibrium) Electron: Boltzmann Distribution Photon: Planck Distribution

  19. 2.7 Nonlinear Optics • Multi-photon Ionization • Tunneling Ionization • Over-threshold Ionization • Photo-ionization • Collisional Ionization • Pressure Ionization

  20. 2.8 Other Ways to Produce Plasmas

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