This book focuses on the characteristics of optical radiation, or a spectrum, emitted by various plasmas. In plasma, the same atomic species can produce quite different spectra, or colors depending on the nature of the plasma. This book gives a theoretical framework, by which a particular spectrum can be interpreted correctly and coherently. The uniqueness of the book lies in its comprehensive treatment of the intensity distribution of spectral lines and the population density distribution among the atomic levels, in plasma. It is intended to provide beginners with a good perspective of the field, laying out the physics in an extremely clear manner, starting from an elementary level. A very useful feature of the book is the asterisked sections and chapters which can be skipped by readers, who only wish to gain a quick and basic introduction to plasma spectroscopy. It will also be very useful to researchers working actively in the field, acting as a guide for carrying out experiments and interpreting experimental observations.
Author(s): Takashi Fujimoto
Publisher: Oxford University Press, USA
Year: 2004
Language: English
Pages: 300
Contents......Page 8
List of symbols and abbreviations......Page 10
1.1 Historical background and outline of the book......Page 14
1.2 Various plasmas......Page 25
1.3 Nomenclature and basic constants......Page 26
1.4 z-scaling......Page 27
1.5 Neutral hydrogen and hydrogen-like ions......Page 28
1.6 Non-hydrogen-like ions......Page 32
2.1 Velocity and population distributions......Page 35
2.2 Black-body radiation......Page 38
3 Atomic processes......Page 43
3.1 Radiative transitions......Page 44
3.2 Radiative recombination......Page 55
3.3 Collisional excitation and deexcitation......Page 61
3.4 lonization and three-body recombination......Page 72
3.5 Autoionization, dielectronic recombination, and satellite lines......Page 77
3.6 Ion collisions......Page 85
Appendix 3A. Scaling properties of ions in isoelectronic sequence......Page 89
Appendix 3B. Three-body recombination "cross-section"......Page 92
4.1 Collisional-radiative (CR) model......Page 96
4.2 Ionizing plasma component......Page 109
4.3 Recombining plasma component – high-temperature case......Page 124
4.4 Recombining plasma component – low-temperature case......Page 133
4.5 Summary and concluding remarks......Page 144
Appendix 4A. Validity of the statistical populations among the different angular momentum states......Page 147
Appendix 4B. Temporal development of excited-level populations and validity condition of the quasi-steady-state approximation......Page 149
5 Ionization and recombination of plasma......Page 163
5.1 Collisional-radiative ionization......Page 164
5.2 Collisional-radiative recombination – high-temperature case......Page 170
5.3 Collisional-radiative recombination – low-temperature case......Page 176
5.4 lonization balance......Page 180
5.5 Experimental illustration of transition from ionizing plasma to recombining plasma......Page 195
Appendix 5A. Establishment of the collisional-radiative rate coefficients......Page 201
Appendix 5B. Scaling law......Page 203
Appendix 5C. Conditions for establishing local thermodynamic equilibrium......Page 204
Appendix 5D. Optimum temperature, emission maximum, and flux maximum......Page 215
6.1 Recombination continuum......Page 218
6.2 Continuation to series lines......Page 220
6.3 Free–free continuum – Bremsstrahlung......Page 224
7 Broadening of spectral lines......Page 226
7.1 Quasi-static perturbation......Page 227
7.2 Natural broadening......Page 231
7.3 Temporal perturbation – impact broadening......Page 232
7.4 Examples......Page 237
7.5 Voigt profile......Page 246
8.1 Total absorption......Page 249
8.2 Collision-dominated plasma......Page 253
8.3 Radiation trapping......Page 258
Appendix 8A. Interpretation of Figure 1.5......Page 265
9.1 Modifications of atomic potential and level energy......Page 270
9.2 Transition probability and collision cross-section......Page 274
9.3 Multistep processes involving doubly excited states......Page 279
9.4 Density of states and Saha equilibrium......Page 290
L......Page 299
Z......Page 300
