Search Results - "Björkas, C"

Influence of the picosecond defect distribution on damage accumulation in irradiated α -Fe by Björkas, C., Nordlund, K., Caturla, M. J.

“…The importance of the defect distribution produced in the first few picoseconds of a collision cascade on long-term damage evolution is studied with molecular…”
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Atomistic simulations of the effect of reactor-relevant parameters on be sputtering by Safi, E., Björkas, C., Lasa, A., Nordlund, K., Sukuba, I., Probst, M.

“…Beryllium (Be) is the main plasma-facing material in the present day fusion reactor JET as well as in the upcoming ITER. Thus, the Be erosion plays a key role…”
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Modelling radiation effects using the ab-initio based tungsten and vanadium potentials by Björkas, C., Nordlund, K., Dudarev, S.

“…The Embedded Atom Model (EAM) Derlet–Nguyen–Manh–Dudarev tungsten and vanadium potentials were modified to correctly reproduce the experimentally obtained…”
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Comparative study of cascade damage in Fe simulated with recent potentials by Björkas, C., Nordlund, K.

“…Considerable quantitative uncertainty has remained regarding the amount and structure of defects produced in molecular dynamics simulations of collision…”
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Variables affecting simulated Be sputtering yields by Björkas, C., Nordlund, K.

“…Since beryllium is a strong candidate for the main plasma-facing material in future fusion reactors, its sputtering behaviour plays an important role in…”
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Temperature dependence of underdense nanostructure formation in tungsten under helium irradiation by Valles, G., Martin-Bragado, I., Nordlund, K., Lasa, A., Björkas, C., Safi, E., Perlado, J.M., Rivera, A.

“…Recently, tungsten has been found to form a highly underdense nanostructured morphology (“W fuzz”) when bombarded by an intense flux of He ions, but only in…”
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The effect of Cr concentration on radiation damage in Fe–Cr alloys by Vörtler, K., Björkas, C., Terentyev, D., Malerba, L., Nordlund, K.

“…Displacement cascades in Fe–Cr alloys were studied using molecular dynamics computer simulations. We considered random Fe–5Cr and Fe–15Cr alloys, as well as…”
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Assessment of the relation between ion beam mixing, electron–phonon coupling and damage production in Fe by Björkas, C., Nordlund, K.

“…As a step in the process of assessing the reliability of interatomic potentials for iron, we compare experimental measurements of ion beam mixing with values…”
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Primary radiation damage in bcc Fe and Fe–Cr crystals containing dislocation loops by Terentyev, D., Vörtler, K., Björkas, C., Nordlund, K., Malerba, L.

“…Previous molecular dynamics studies of displacement cascades in Fe–Cr alloys have shown that the presence of Cr hardly affects the primary damage state as…”
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MD simulations of low energy deuterium irradiation on W, WC and W2C surfaces by Lasa, A., Björkas, C., Vörtler, K., Nordlund, K.

“…According to the present design beryllium (Be), tungsten (W) and carbon (C) will be the plasma facing materials in the ITER fusion reactor. Due to sputtering…”
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Erosion of beryllium under high-flux plasma impact by Doerner, R.P., Björkas, C., Nishijima, D., Schwarz-Selinger, T.

“…Be sputtering yields, measured by weight loss, in PISCES-B are a factor of 5–10 less than that predicted by binary collision approximations. Measurements show…”
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Chemical sputtering of Be due to D bombardment by Björkas, C, Vörtler, K, Nordlund, K, Nishijima, D, Doerner, R

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The effect of hydrocarbon chemistry on sputtering in mixed Be–C–H materials by Meinander, A., Björkas, C., Nordlund, K.

“…Molecular dynamics simulations of low energy sputtering from mixed Be–C surfaces have been performed to gain an insight into the evolution and response of…”
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Simulation of displacement cascades in Fe90Cr10 using a two band model potential by BJÖRKAS, C, NORDLUND, K, MALERBA, L, TERENTYEV, D, OLSSON, P

“…Molecular dynamics (MD) simulations of displacement cascades, with recoil energies up to 50 keV, have been performed in Fe90Cr10 and Fe using a recently…”
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Multiscale modeling of BeD release and transport in PISCES-B by Björkas, C., Borodin, D., Kirschner, A., Janev, R.K., Nishijima, D., Doerner, R., Nordlund, K.

“…Observation of BeD sputtering in several different fusion plasma devices demonstrates the need to include these molecules into predictive modeling codes. In…”
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The effect of C concentration on radiation damage in Fe–Cr–C alloys by Meinander, A., Henriksson, K.O.E., Björkas, C., Vörtler, K., Nordlund, K.

“…Using a recently developed analytical bond-order potential for the complete ternary system, we performed molecular dynamics simulations of the primary…”
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Sputtering of Be/C/W compounds in molecular dynamics and ERO simulations by Airila, M.I., Björkas, C., Lasa, A., Meinander, A., Nordlund, K., Vörtler, K.

“…We have implemented molecular dynamics (MD) generated sputtering data in the Monte Carlo impurity transport code ERO. The data set covers D bombardment of BeC,…”
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Mechanism of swift chemical sputtering: Comparison of Be/C/W dimer bond breaking by Nordlund, K., Björkas, C., Vörtler, K., Meinander, A., Lasa, A., Mehine, M., Krasheninnikov, A.V.

“…Current and future tokamak-like fusion reactors include the three elements Be, C, and W as the plasma-facing materials. During reactor operation, also mixtures…”
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ERO code benchmarking of ITER first wall beryllium erosion/re-deposition against LIM predictions by Borodin, D, Kirschner, A, Carpentier-Chouchana, S, Pitts, R A, Lisgo, S, Björkas, C, Stangeby, P C, Elder, J D, Galonska, A, Matveev, D, Philipps, V, Samm, U

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Modelling the erosion of beryllium carbide surfaces by Mehine, M., Björkas, C., Vörtler, K., Nordlund, K., Airila, M.I.

“…Redeposition of beryllium eroded from main chamber plasma facing components of ITER onto the divertor material carbon creates a mixed material, beryllium…”
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