Speaker
Valentina Marascu
(National Institute for Laser)
Description
Controlled fusion research represents an important step for sustainable energy production once with the development of the International Thermonuclear Experimental Reactor (ITER). ITER proposes a deuterium - tritium fusion reaction for hot plasma creation. During plasma- wall interactions, small tungsten particles, from nm to microns will be produced in the tokamak chamber. These particles can incorporate tritium leading to potential danger of environment contamination and also explosions. Thus, it is of interest to produce, aiming to study their properties in advance, tungsten particles with plasma methods. In this line, our contribution consists in analysing the production of tungsten particles, by using a radiofrequency plasma in hollow electrode discharge configuration. As a main gas we have used argon, the cathode was from tungsten and the plasma was focused in a small tungsten pipe, with the inner diameter from about 2 mm. Small tungsten particles were produced, as example in using 1500 sccm gas flow rate and for 225 watts, input power. The shape, size and size distributions of the resulted particles were investigated by Scanning Electron Microscopy, while EDS measurements demonstrated that the particles were from tungsten. The tungsten particles dimension and number can be modified by varying the process parameters, like gas flow rate, input power and pressure.
Acknowledgements
V. Marascu acknowledges the support in the frame of the project 1-EU12 WPEDU-RO, "EUROfusion Consortium contribution to education in fusion research at the predoctoral and PhD level ".
Co-authors
Anca Bonciu
(National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Romania;Faculty of Physics, University of Bucharest, 405 Atomistilor Street, Magurele, Romania)
Andrada Lazea-Stoyanova
(National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Romania)
Cristian Stancu
(National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Romania)
Gheorghe Dinescu
(National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Romania;Faculty of Physics, University of Bucharest, 405 Atomistilor Street, Magurele, Romania)
Valentina Marascu
(National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele, Romania;Faculty of Physics, University of Bucharest, 405 Atomistilor Street, Magurele, Romania)
