- About
- ADAS-EU
- ADAS
- Personnel
- Diary
- Courses
- Scientific Themes
- Heavy Species
- Charge Exchange
- Beam stop./emiss.
- Special Features
- Molecules
- Complementary Themes
- Dissemination
- Management
- Implementation
- Overview
- Progress
- OPEN-ADAS
Embedding low and high ion fiducials
(part of theme Heavy Element Spectoscopy and Models)
Objective
The complexity of many-electron heavy element ions is at its most severe for neutral and near neutral atoms with increasing imprecision of baseline and level 1 modelling. Sound theoretical photon efficiencies for tungsten are elusive. Also such ions are typically in a highly ionising environment in fusion with pathways for multiple electron loss which are discounted for lighter elements. At the other, highly ionised, end of the scale, full relativistic collision calculations become appropriate. Sub-contracting to European university specialists for delivery of fiducial calculations to ADAS-EU specification will enable correction of this situation and take the ADAS-EU capability from level 1 to level 2 for named key ions.
Specific tasks
- Procure level 2 ionisation data for selected tungsten ion of charge state < 20, including initial inner electron loss followed by complex Auger/radiative shake-down and shake-off - the calculations to use massive multi-config. Jucys methods. Embed in the extended ionisation data handling capacity of ADAS format adf23 and utilise in the higher off- diagonal matrix handlers of the superstage compression algorithms. Develop error estimates for level1.
- Procure fiducial level 2 `ic' atomic structure, radial and Born integrals for W0 , W+1 and other selected ions from advanced polarisability, finite core, calculations. Embed in `ic' population modelling, delivering level 2 emissivities and photon efficiencies. Develop error estimates for level 1.
- Procure fiducial level 2 `ic' DARC (fully relativistic) and RMATRIX-II (`ic' inner region) for excitation cross- sections of W+60 and other selected neighbouring ions for comparison with RMATRIX-ICFT results. Embed in `ic' population modelling, delivering level 2 emissivities. Develop error estimates for level 1.
- Implement global upscaling of level 1 using inferred scaling parameters from the fiducials.
- Revision. Timing is subject to laboratory responses and indeterminate at this stage.