Volframo dangų, naudojamų termobranduolinės sintezės reaktoriuose, apibūdinimas (FUSION programa)

Projekto programa
Vykdymo laikotarpis
2006.01.01 - 2008.06.01
Projekto statusas
Baigtas
Projekto lentelė

Main problem – is to understand physical phenomena of mechanical properties of W and to reduce the impurities in the main chamber:

  • Mechanism of restructuring and surface relocations under high-flux irradiation at elevated temperatures.
  • Material erosion by continuous or transient plasma ion and neutral impact, the subsequent transport of the released impurities through by the plasma and their deposition and/or eventual re-erosion constitute the process of migration.
  • Due to erosion mechanism and re-deposition materials will interact on plasma facing surfaces.

The goal of the research is the fabrication of W films to be used in plasma-facing components in fusion devices, and the understanding of the mechanism of physical phenomena initiating modifications of mechanical properties of W-based thin films on carbon based substrates under high-flux, low-energy H+ ions irradiation in the range of temperatures up to 1000°C.

Descriptions of work:

  • Fabrication of W coatings by magnetron sputter deposition;
  • Structural and compositional investigation of W coatings;
  • Plasma/ion beam H exposure of W coatings;
  • Studies of W coatings properties after hydrogen ion irradiation;
  • Modeling of the surface restructuring and re-deposition effects in W film under high-flux, high-fluence, low-energy hydrogen ion irradiation.

Expected results:

  • To form dense nanocrystallline thin W films (optimization of film deposition parameters for thickness and homogenity of W films);
  • To investigate structure and composition of W coatings;
  • To commit irradiation experiments;
  • To model surface redoposition and reconstruction effects on composition and structure of W films initiated H irradiation.

Koordinatorius: Lietuvos energetikos institutas (LEI)

Partneriai:

  • Lietuvos energetikos institutas (LEI)
  • Vytauto Didžiojo universitetas (VDU)

Projekto vykdytojai