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Projects / Programmes source: ARIS

Development of diagnostics for certain paremeters of edge plasma in fusion devices

Research activity

Code Science Field Subfield
2.03.02  Engineering sciences and technologies  Energy engineering  Fuels and energy conversion technology 

Code Science Field
T160  Technological sciences  Nuclear engineering and technology 
Keywords
fusion, atomic hydrogen, hydrogen recombination, plasma, ions, negative ions, plasma diagnostics, catalytic probe, Langmuir probe, emissive probe, tokamak, divertor
Evaluation (rules)
source: COBISS
Researchers (6)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  20219  PhD Iztok Čadež  Physics  Researcher  2007 - 2010  228 
2.  01116  PhD Milan Čerček  Physics  Head  2007 - 2010  318 
3.  10401  PhD Tomaž Gyergyek  Physics  Researcher  2007 - 2010  414 
4.  15703  PhD Janez Kovač  Electronic components and technologies  Researcher  2007 - 2010  672 
5.  10429  PhD Miran Mozetič  Electronic components and technologies  Researcher  2007 - 2010  1,353 
6.  20048  PhD Alenka Vesel  Electronic components and technologies  Researcher  2007 - 2010  689 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,724 
2.  1538  University of Ljubljana, Faculty of Electrical Engineering  Ljubljana  1626965  27,771 
Abstract
In the project we propose the research and development of diagnostics of atomic hydrogen with a catalytic probe, which is especially suitable for measurements of recombination coefficients of hydrogen on the surfaces of materials relevant for construction of elements in contact with plasma in fusion devices. Recombination coefficients will be systematically measured for different materials, at various fluxes of hydrogen atoms, at different temperatures and morphologies of the surface. Further, we intend to develop or upgrade some of the special probes for magnetized hydrogen plasma diagnostics. The potential formation in front of a negative wall in plasma with multiple negative and positive species will be studied, also taking into account the effects of magnetic field and particle collisions.
Significance for science
The results obtained in the studies of potential formation in front of electrodes in complex plasmas most certainly contribute to the development of diagnostic techniques in boundary plasmas in fusion machines. In the particular case mostly to the understanding of turbulent transport of particles and energy across the magnetic field to the wall of the reactor. To the best of our knowledge, our results represent also a breakthrough in quantification of the interaction between plasma radicals and carbon from fusion reactors. The unique probe for measuring the density of neutral radicals in oxygen and hydrogen plasma allow for rather precise determination of the radicals flux on the surface of the components from fusion reactors. Since the sophisticated devices for surface and thin film characterization allow for rather precise determination of the material thickness, we can calculate the interaction probabilities. These probabilities have not been known yet (or the values estimated were not at all precise). Our results therefore represent important data for simulation of the behavior of plasma in remote parts of fusion reactors.
Significance for the country
Our results represent an important contribution to the affirmation of Slovenia in the European fusion society. Although our research groups does not own very expensive plasma reactors, our innovativeness help solving important technological problems arising in development of the international fusion reactor ITER. Nuclear fusion is a promising source of energy for next generation as it does not produce any carbon dioxide and thus does do contribute to the global heating problems.
Most important scientific results Annual report 2008, 2009, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2008, 2009, final report, complete report on dLib.si
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