- Computes spectra and ionization distributions of plasmas with uniform temperatures and densities (single volume elements of finite size).
- Includes an easy-to-use graphical user interface for problem setup and viewing results.
- Includes on-line documentation, including direct access to Help pages from widgets.
- Computes atomic level populations and spectra for LTE* and non-LTE plasmas.
- Computes influence of external radiation field on populations and spectra.
- Includes modeling for plasmas with non-Maxwellian electron distributions.
- Computes absorption spectra for plasma/backlighter systems.
- Supports solution of either steady-state or time-dependent atomic rate equations.
- Supports convenient computation of results for a 2-D grid of independent variables. The variables could include any two of the following:
- Temperature
- Density
- Plasma size
- Composition
- External radiation field
- Non-Maxwellian electron distribution parameters
- Includes graphics package for visualizing results for:
- Frequency-dependent quantities, convolved with instrumental broadening
- Emission spectra
- Transmission spectra
- Opacity
- Optical depth
- Ionization fractions
- Atomic level populations
- Includes the following atomic processes in collisional-radiative modeling:
- Collisional ionization, recombination, excitation, and deexcitation
- Photoionization and stimulated recombination
- Photoexcitation and stimulated emission
- Spontaneous decay
- Radiative recombination
- Dielectronic recombination, autoionization, and electron capture
- Includes Doppler, natural (incl. autoionization contributions), and Stark broadening in line profile modeling **.
- Utilizes ATBASE suite of atomic codes for supplying:
- Photoionization cross-sections
- Oscillator strengths
- Collisional ionization cross-sections
- Collisional excitation cross-sections
- Atomic level energies and transition energies
- Dielectronic recombination, autoionization, and electron capture rates
- Incorporates NIST atomic level energies and oscillator strengths when available
- Interfaces with other Prism applications:
- AtomicModelBuilder: a user-friendly tool for setting up custom atomic models
* LTE = local thermodynamic equilibrium
** For prominent K-shell lines, Stark lineshapes are computed based on MERL code (L. Woltz, C. Hooper, Jr., Phys. Rev. A, Vol. 38, p. 4766 (1988) and R. Mancini, et al., Comp. Phys. Commun., Vol. 63, p. 314 (1991))