Asymmetries in plasma line broadening
Thesis/Dissertation
·
OSTI ID:6917608
Spectra lines have long been used as a density diagnostic in dense plasmas. Early theories produced hydrogenic spectral lines that were symmetric. At higher plasma densities, diagnostics could be improved if asymmetries were included. In this work, several sources of line asymmetry are considered. In Chapter One, the ion quadrupole interaction is studied. This is the interaction between the radiator quadrupole tensor and the electric-field gradients of the perturbing ions. The field gradients are calculated in an Independent Perturber Model. Two other asymmetry sources, fine-structure splitting and quadratic Stark effect, are considered in Chapter Two. Results of the combination of these effects follow in Chapter Three. Non-hydrogenic spectral lines are also asymmetric. In Chapter Four, a procedure for calculating the spectral lines from helium-like ions is outlined.
- Research Organization:
- Florida Univ., Gainesville (USA)
- OSTI ID:
- 6917608
- Country of Publication:
- United States
- Language:
- English
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