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ADAS for Fusion in Europe

Periodic Report Summary 3 - ADAS-EU (ADAS for Fusion in Europe)

Project Context and Objectives:
ADAS-EU is a support activity of four years duration (2009-2012) for efficient implementation of atomic data and models in plasma diagnostics and plasma modelling at fusion laboratories throughout Europe, including ITER. This is achieved under ADAS-EU by placement of staff in selected fusion laboratories in Europe and by staff visits to ensure effective engagement with local experimental programmes and needs, by training courses in the ADAS atomic modelling and data techniques and by information and data on publically accessible websites. From a scientific perspective, ADAS-EU was designed to deliver substantial capabilities in five main areas of atomic physics application to magnetic confinement fusion, called themes in the ADAS-EU plan. These themes are 1. Heavy element spectroscopy and models, 2. Charge exchange spectroscopy, 3. Beam stopping and emission, 4. Special Features, 5. Diatomic spectra and collisional-radiative models. An additional theme 6: Medium-weight element Generalised-Collisional-Radiative modelling was added during the project. ADAS-EU post-doctoral research staff are currently placed at CEA Cadarache, (Dr. F Guzman), at the Max-Planck-Institute for Plasma Research, Garching, Germany (Dr. L. Menchero) and CCFE Culham Laboratory/JET Facility (Dr. A. Giunta) . ADAS-EU senior staff are based at the EFDA-JET Facility, Culham Laboratory, UK and at the University of Strathclyde, Glasgow, UK. The ADAS-EU web-site (http://www.adas-fusion.eu) has been setup in parallel with the ADAS website (http://www.adas.ac.uk). These websites provide full information on ADAS-EU, courses and publications. The OPEN-ADAS facility for accessing relevant atomic data has been established (http://open.adas.ac.uk) and is subject to high demand. ADAS-EU staff are now fully engaged on atomic/plasma questions and support issues at their local laboratories and through Europe. ADAS-EU staff give substantial attention to ITER, the EFDA-JET Facility, European plasma modelling collaborations and with European laboratories and Universities engaged or utilising plasma atomic physics for fusion.
Project Results:
ADAS-EU has put in place a complete, baseline, infrastructure for atomic modelling of heavy species and for analysing their spectral emission in fusion plasma. This has enabled progress to be made in impurity plasma transport modelling for ITER with tungsten wall material. Targetted lifting of the atomic modelling for critical tungsten ions, such as W0, W+20 and W+44¸ through ADAS-EU sub-contracts and the ADAS-EU Electron Collision Working Party, has solved the most difficult atomic issues of tungsten in the plasma phase for ITER On the charge exchange theme, ADAS-EU sub-contracts, universal charge exchange models and extended collisional-radiative modelling have solved the problems of reliability of the fundamental cross-section data and allows confident predictions of beam driven charge exchange spectral emissivities for all relevant ions, including tungsten, up to the highest relevant charge state for ITER, W+60. ADAS-EU has moved forward at the highest precision levels for generalised collisional-radiative modelling of medium weight elements, enabled by new methods and code packages for ionisation, excitation and dielectronic recombination. The achievable precisions from these capabilities will provide the derived atomic data needs for thermal plasma through to the end of ITER. ADAS-EU has put in place a sophisticated machinery for special feature spectral analysis, closely linked to the derived atomic modelling capabilities of ADAS. Designed in close collaboration with JET Facility staff, this versatile system enables the full power of ADAS to be brought directly into fine experimental spectroscopic analysis. On the molecular theme, with the extended molecular reaction database for molecular hydrogen in place, development has focussed on the collisional-radiative modelling and the creation of a spectral analysis capability for H2 isotopomer. This has progressed well. An advanced non-perturbative model for neutral beam population and emission modelling has been put in place which takes beam analysis up to the ITER heating beam energy regime. There has also been very large exploitation of the theme 6 new codes and methods which has more than trebled the size of the ADAS databases. ADAS-EU staff have become deeply engaged in ITER predictive modelling and diagnostic definition. The conceptual design phase of ITER spectroscopic diagnostics has depended strongly on ADAS-EU inputs.
Potential Impact:
The final delivery of ADAS-EU is six major documents, called PUBL1 - PUBL6. These summative works detail the completed scientific development of the main themes, and the code packages and data sets and which are the realisation of the science. All relevant datasets are available through OPEN-ADAS and the integrated code packages through ADAS. There is a documented legacy of the annual ADAS-EU courses and the general dissemination of ADAS knowledge and its utilisation for fusion. ADAS-EU has promulgated collaboration between European University groups, capable in atomic physics and interested in the fusion objectives. Forward from the end of ADAS-EU, it is planned that the Electron Collision Working Party will transform and grow to guide the further scientific developments of ADAS and ensure continued European-wide collaboration. ADAS-EU has helped to bridge the gap between the JET Facility and ITER, such that ADAS, which originated at the JET Facility, is now fit and ready for ITER.
List of Websites:
www.adas-fusion.eu