Modeling of Atomic Processes for X-Ray Laser Plasmas
Abstract
This work dealt with the theoretical modeling and computation of photoionization, photoexcitation, radiative decay and radiative recombination processes for multielectron atoms and ions in plasmas. Such atomic processes lead to and influence lasing in x-ray lasers operating both in the soft and hard x ray regions. This research utilized a two-component, finite temperature, self consistent density functional method and demonstrated that this method is applicable for arbitrary plasma density and temperature and is capable of accurately treating multielectron ions of arbitrary Z. Electron collisional ionization and excitation processes were investigated. These processes are an important mechanism through which population inversion of ionic energy levels lead to lasing in the soft x-ray region. Previously theoretical calculations utilizing a semi-classical impact approximation have been performed. In many cases such a method is inadequate. Computations were carried out by electron impact ionization and excitation cross-sections and rate coefficients utilizing the distorted wave with exchange method. Keywords: Photoionization, Photoexcitation, Plasmas, Multielectron, Atoms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1988
- Accession Number
- ADA200219
Entities
People
- Uday Gupta