si sFa
the slovenian Fusion association, sFa, coordinates fusion research in slovenia.
Key sFa FaCts • integrated in the joint European framework of national fusion research units since 2005 • led by its largest member Jožef stefan institute (Jsi) • Comprises eight other laboratories, and three faculties of the university of ljubljana: faculty of mechanical Engineering, faculty of Electrical Engineering and faculty of mathematics and physics • Engages 50 scientists working on plasma theory, diagnostics, plasma-wall interaction processes, high heat flux materials, neutron field calculations, design studies, thermohydraulic and mechanical analyses • slovenian researchers collaborate in experimental campaigns involving JEt (uK), asDEX upgrade (germany), tCv (switzerland) and support development and construction of itEr and DEmo
soMe ReseaRCH lines PuRsueD by sFa ReseaRCHeRs: plasma-wall interaction studies – ion beam analytical methods are applied in order to study plasma-wall interaction processes on itEr and DEmo relevant materials. linear 2 Mv tandetron accelerator at Jsi with its 4 beam lines is used as the main experimental facility.
advanced high heat flux materials for DEmo divertor - Jsi-department for nanostructured ma- terials develops tungsten-based materials reinforced with fibres and/or carbide to improve the thermo-mechanical properties of the material. sintering at high temperatures is used to densify the composites.
neutron calculations designed to support JEt neutron yield calibration – neutronics studies are performed at Jsi to calibrate neutron detectors in the event of a high neutron source inserted into the JEt torus by the remote handling system.
thermal model of the DEmo tokamak – thermal model of the baseline DEmo design is developed at Jsi in order to predict the thermal loading and refrigeration power required for the magnet system and thermal shields.
Experimental campaigns on European tokamak devices – a new diagnostic system for detection of impurities in the gas exhaust is implemented at JEt. Jsi researchers are also involved in dedicated ammonia experiments at asDEX upgrade.
Development of visualisation tools to support integrated modelling – faculty of mechanical engineering (university of ljubljana) is developing an interface tool for easy CaD data transfer into fusion modelling codes.
slovenia . JožeF steFan institute . ion beaM analytiCs . Heat FluX . visualisation . neutRoniCs . www.sFa-Fusion.si 28