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ADAS for Fusion in Europe

Periodic Report Summary - ADAS-EU (ADAS for fusion in Europe)

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 to be 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 is planned 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 areL
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.

Following the plan, in this first reporting period, ADAS-EU post-doctoral research staff have been placed at the Institute for Energy Research, Fz-Juelich, Germany (Dr F Guzman) and at the Max-Planck-Institute for Plasma Research, Garching, Germany (Dr L. Menchero). ADAS-EU senior staff are based at the EFDA-JET Facility, Culham Laboratory, United Kingdom.

The ADAS-EU web-site (see online) has been setup in parallel with the ADAS website (see online). The OPEN-ADAS facility for accessing relevant atomic data has been established (see online). It is operating smoothly and is subject to high demand. ADAS-EU staff are now engaged on atomic/plasma questions and support issues at their local laboratories and have collectively made six support visits to external laboratories in Europe in this first period.

The first ADAS-EU course was held at the Max-Planck-Institute for Plasma Research, Garching between 8-16 Oct 2009. The course was over-subscribed with fourteen participants (four from the local laboratory). All participants engaged extremely well with the five tutors and course tasks. All were strongly enthusiastic about the course and its value to their research.

The principal scientific themes have progressed largely according to the ADAS-EU plan, with most planned milestones met in this first period, but with a balanced advance of some tasks and delay of others in response to the needs of the fusion programme and available staff time. The heavy element spectroscopy theme is significantly in advance in response to the urgent need to enable full modelling of tungsten. A marked success has been early implementation of superstaging and feature emissivities. The former has enabled 2D transport models to deal with tungsten and is the subject of several conference papers. In the charge exchange spectroscopy theme, the implementation of CXSFIT and universal scaled state selective CXS data for heavier, more highly charged receivers have been notable advances. The spectral fitting code CXSFIT operates now at all the main laboratories in Europe.

The special feature theme tasks have been moved substantially forward and the whole machinery is now being tested on a range of spectra at EFDA-JET. This is a powerful additional facility. The diatomic spectra theme has been much more demanding of staff time than expected although the primary molecular data archiving infrastructure and data is now in place. The collisional-radiative model will be somewhat delayed in being completed.

ADAS and ADAS-EU are now central resources for the fusion programme, with all ITER member participating in ADAS and relying on ADAS data and models. The final ADAS-EU delivery will include a series of five large scientific/technical/implementation documents spanning the five themes, the writing of which is progressing well. From an atomic perspective, these will be definitive for ITER and beyond.

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