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| Hauptseite > Publikationsdatenbank > Effect of High-flux H/He Plasma Exposure on Tungsten Damage Due to Transient Heat Loads > print |
| Hauptseite > Publikationsdatenbank > Effect of High-flux H/He Plasma Exposure on Tungsten Damage Due to Transient Heat Loads > print |
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| 100 | 1 | _ | |a De Temmerman, G. |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Effect of High-flux H/He Plasma Exposure on Tungsten Damage Due to Transient Heat Loads |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2015 |b Elsevier Science |
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| 520 | _ | _ | |a The thermal shock behaviour of tungsten exposed to high-flux plasma is studied using a high-power laser. The cases of laser-only, sequential laser and hydrogen (H) plasma and simultaneous laser plus H plasma exposure are studied. H plasma exposure leads to an embrittlement of the material and the appearance of a crack network originating from the centre of the laser spot. Under simultaneous loading, significant surface melting is observed. In general, H plasma exposure lowers the heat flux parameter (FHF) for the onset of surface melting by ∼25%. In the case of He-modified (fuzzy) surfaces, strong surface deformations are observed already after 1000 laser pulses at moderate FHF = 19 MJ m−2 s−1/2, and a dense network of fine cracks is observed. These results indicate that high-fluence ITER-like plasma exposure influences the thermal shock properties of tungsten, lowering the permissible transient energy density beyond which macroscopic surface modifications begin to occur. |
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| 700 | 1 | _ | |a Chraska, T. |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Pitts, R. A. |0 P:(DE-HGF)0 |b 7 |
| 700 | 1 | _ | |a Wright, G. M. |0 P:(DE-HGF)0 |b 8 |
| 773 | _ | _ | |a 10.1016/j.jnucmat.2014.09.075 |g Vol. 463, p. 198 - 201 |0 PERI:(DE-600)2001279-2 |p 198 - 201 |t Journal of nuclear materials |v 463 |y 2015 |x 0022-3115 |
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