<abstract xmlns="http://www.w3.org/1999/xhtml">Tungsten is a prime choice for armor material in future nuclear fusion devices. For the realization of fusion, it is necessary to address issues related to the plasma–armor interactions. In this work, several types of tungsten material were studied, i.e. tungsten prepared by spark plasma sintering (SPS) and by water stabilized plasma spraying (WSP) technique. An intended surface porosity was created in the samples to model hydrogen/helium bubbles. The samples were subjected to a laser heat loading and a radiation loading of deuterium plasma to simulate edge plasma conditions of a nuclear fusion device (power density of 108 W/cm2 and 107 W/cm2, respectively, in the pulse intervals up to 200 ns). Thermally induced changes in the morphology and the damage to the studied surfaces are described. Possible consequences for the fusion device operation are pointed out.</abstract>

Tungsten is a prime choice for armor material in future nuclear fusion devices. For the realization of fusion, it is necessary to address issues related to the plasma–armor interactions. In this work, several types of tungsten material were studied, i.e. tungsten prepared by spark plasma sintering (SPS) and by water stabilized plasma spraying (WSP) technique. An intended surface porosity was created in the samples to model hydrogen/helium bubbles. The samples were subjected to a laser heat loading and a radiation loading of deuterium plasma to simulate edge plasma conditions of a nuclear fusion device (power density of 108 W/cm2 and 107 W/cm2, respectively, in the pulse intervals up to 200 ns). Thermally induced changes in the morphology and the damage to the studied surfaces are described. Possible consequences for the fusion device operation are pointed out.

Heat load and deuterium plasma effects on SPS and WSP tungsten

Institute of Plasma Physics ASCR, Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic

Institute of Plasma Physics and Laser Microfusion (IPPLM), 23 Hery Str., 01-497 Warsaw, Poland

Laboratory of Nanostructures and Nanomaterials, Institute of Physics, Na Slovance 2, 182 21 Prague 8, Czech Republic

Nukleonika

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Heat load and deuterium plasma effects on SPS and WSP tungsten"}

Tungsten is a prime choice for armor material in future nuclear fusion devices. For the realization of fusion, it is necessary to address issues related to the...

Heat load and deuterium plasma effects on SPS and WSP tungsten

Published Online: Jun 22, 2015

Page range: 275 - 283

Received: Jun 22, 2014

Accepted: Oct 31, 2014

DOI: https://doi.org/10.1515/nuka-2015-0061

Keywords
tungsten, fusion, heat loading, irradiation, bubbles, surface damage

© Monika Vilémová et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Heat load and deuterium plasma effects on SPS and WSP tungsten

Published Online: Jun 22, 2015

Page range: 275 - 283

Received: Jun 22, 2014

Accepted: Oct 31, 2014

DOI: https://doi.org/10.1515/nuka-2015-0061

Keywordstungsten, fusion, heat loading, irradiation, bubbles, surface damage

© Monika Vilémová et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
tungsten, fusion, heat loading, irradiation, bubbles, surface damage