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Thermal shock behaviour of H and H/He-exposed tungsten at high temperature

Nathan Lemahieu, Henri Greuner, Jochen Linke, Hans Maier, Gerald Pintsuk, Marius Wirtz, Guido Van Oost (UGent) and Jean-Marie Noterdaeme (UGent)
(2016) PHYSICA SCRIPTA. T167.
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Abstract
Polycrystalline tungsten samples were characterized and exposed to a pure H beam or mixed H/He beam containing 6% He in GLADIS at a surface temperature of 600 degrees C, 1000 degrees C, or 1500 degrees C. After 5400 s of exposure time with a heat flux of 10.5 MW m(-2), the total accumulated fluence of 2 x 10(25) m(-2) was reached. Thereafter, edge localized mode (ELM)-like thermal shocks with a duration of 1 ms and an absorbed power density of 190 MW m(-2) and 380 MW m(-2) were applied on the samples in JUDITH 1. During the thermal shocks, the base temperature was kept at 1000 degrees C. The ELM-experiments with the lowest transient power density did not result in any detected damage. The other tests showed the beginning of crack formation for every sample, except the sample pre-exposed with the pure H-beam at 1500 degrees C in GLADIS. This sample was roughened, but did not show any crack initiation. With exception to the roughened sample, the category of ELM-induced damage for the pre-exposed samples is identical to the reference tests without pre-exposure to a particle flux.
Keywords
SIMULATION, GROWTH, LOADS, tungsten, divertor, plasma wall interaction, thermal shock resistance, ELMs

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MLA
Lemahieu, Nathan, et al. “Thermal Shock Behaviour of H and H/He-Exposed Tungsten at High Temperature.” PHYSICA SCRIPTA, vol. T167, IOP PUBLISHING LTD, 2016, doi:10.1088/0031-8949/T167/1/014008.
APA
Lemahieu, N., Greuner, H., Linke, J., Maier, H., Pintsuk, G., Wirtz, M., … Noterdaeme, J.-M. (2016). Thermal shock behaviour of H and H/He-exposed tungsten at high temperature. PHYSICA SCRIPTA, T167. https://doi.org/10.1088/0031-8949/T167/1/014008
Chicago author-date
Lemahieu, Nathan, Henri Greuner, Jochen Linke, Hans Maier, Gerald Pintsuk, Marius Wirtz, Guido Van Oost, and Jean-Marie Noterdaeme. 2016. “Thermal Shock Behaviour of H and H/He-Exposed Tungsten at High Temperature.” PHYSICA SCRIPTA T167. https://doi.org/10.1088/0031-8949/T167/1/014008.
Chicago author-date (all authors)
Lemahieu, Nathan, Henri Greuner, Jochen Linke, Hans Maier, Gerald Pintsuk, Marius Wirtz, Guido Van Oost, and Jean-Marie Noterdaeme. 2016. “Thermal Shock Behaviour of H and H/He-Exposed Tungsten at High Temperature.” PHYSICA SCRIPTA T167. doi:10.1088/0031-8949/T167/1/014008.
Vancouver
1.
Lemahieu N, Greuner H, Linke J, Maier H, Pintsuk G, Wirtz M, et al. Thermal shock behaviour of H and H/He-exposed tungsten at high temperature. PHYSICA SCRIPTA. 2016;T167.
IEEE
[1]
N. Lemahieu et al., “Thermal shock behaviour of H and H/He-exposed tungsten at high temperature,” PHYSICA SCRIPTA, vol. T167, 2016.
@article{8116686,
  abstract     = {{Polycrystalline tungsten samples were characterized and exposed to a pure H beam or mixed H/He beam containing 6% He in GLADIS at a surface temperature of 600 degrees C, 1000 degrees C, or 1500 degrees C. After 5400 s of exposure time with a heat flux of 10.5 MW m(-2), the total accumulated fluence of 2 x 10(25) m(-2) was reached. Thereafter, edge localized mode (ELM)-like thermal shocks with a duration of 1 ms and an absorbed power density of 190 MW m(-2) and 380 MW m(-2) were applied on the samples in JUDITH 1. During the thermal shocks, the base temperature was kept at 1000 degrees C. The ELM-experiments with the lowest transient power density did not result in any detected damage. The other tests showed the beginning of crack formation for every sample, except the sample pre-exposed with the pure H-beam at 1500 degrees C in GLADIS. This sample was roughened, but did not show any crack initiation. With exception to the roughened sample, the category of ELM-induced damage for the pre-exposed samples is identical to the reference tests without pre-exposure to a particle flux.}},
  articleno    = {{014008}},
  author       = {{Lemahieu, Nathan and Greuner, Henri and Linke, Jochen and Maier, Hans and Pintsuk, Gerald and Wirtz, Marius and Van Oost, Guido and Noterdaeme, Jean-Marie}},
  issn         = {{0031-8949}},
  journal      = {{PHYSICA SCRIPTA}},
  keywords     = {{SIMULATION,GROWTH,LOADS,tungsten,divertor,plasma wall interaction,thermal shock resistance,ELMs}},
  language     = {{eng}},
  location     = {{Aix en Provence, FRANCE}},
  pages        = {{5}},
  publisher    = {{IOP PUBLISHING LTD}},
  title        = {{Thermal shock behaviour of H and H/He-exposed tungsten at high temperature}},
  url          = {{http://doi.org/10.1088/0031-8949/T167/1/014008}},
  volume       = {{T167}},
  year         = {{2016}},
}
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