Investigation of population inversion in dense recombining plasmas
Thesis/Dissertation
·
OSTI ID:5149854
The dynamics of the population density for the n-th atomic state of ions within a uniform, stationary, rapidly cooling plasma are expressed in terms of a set of coupled differential equations and solved numerically by standard techniques, thus yielding a time description of the ion-population levels. An emphasis is placed upon the prediction of population inversion in dense recombining plasmas. Electron collisional interactions are given in terms of a set of analytic, semi-empirical cross sections for which improved numerical approximations are utilized for the first time. A graphical format of the relationship of the total plasma electron temperature drop as a function of the temperature decay time in the prediction of population inversion is displayed. In addition, a set of iterative analytic approximations to the time description of the population densities for the case of instantaneously cooled collision-dominated plasmas are given.
- Research Organization:
- Cornell Univ., Ithaca, NY (USA)
- OSTI ID:
- 5149854
- Country of Publication:
- United States
- Language:
- English
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