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Showing 1 to 9 of 9 for “"Tungsten Surface"”.
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The Interaction of Water Vapor on a Heated Tungsten Surface
Made available in DSpace on 2014-12-08T22:24:31Z (GMT). No. of bitstreams: 1 6910743.pdf: 2367358 bytes, checksum: dede440b7ec396098c7e5e8ff579be9d (MD5) Previous issue date: 1968
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The thermal accommodation coefficients of helium, neon, and argon on surfaces
… of helium, neon, and argon on an ice surface at 77ºK were accomplished; Measurements of the accommodation coefficients of helium and neon on a clean tungsten surface are also reported here; These data are compared with theoretical calculations of accommodation coefficients as well as …
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Simulated Material Erosion from Plasma Facing Components in Tokomak Reactors
… on the divertor, which will be made from tungsten in the future large tokamak ITER. Electrothermal plasma sources operating in the confined controlled arc discharge regime produce heat fluxes in the range expected for hard disruptions in future large tokamaks. The radiative heat flux …
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Characterization of the dynamic formation of nano-tendril surface morphology on tungsten while exposed to helium plasma
Tungsten undergoes surface morphology changes on the nanometer scale when subjected to low energy helium ion bombardment. This is due in part to the ion bombardment causing tungsten atoms to move on the surface, but also because of helium implantation and bubble development in the near surface at a …
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Diffusion and Evaporation of Nitrogen on Tungsten (100)
Surface diffusion and evaporation from a layer of nitrogen chemisorbed on the (100) plane of tungsten has been examined using Auger spectroscopy. The initial localized deposit required for diffusion measurements in a concentration gradient is created by a highly collimated molecular beam. The …
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Angle-Resolved Thermal Desorption Spectroscopy as a Surface Probe
… desorption, where the flux is focused along the surface normal, has been observed in several systems, notably hydrogen desorbing from nickel. This has been explained by invoking a flat barrier to adsorption that selects particles with some minimum normal component of kinetic energy to adsorb. …
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Atomistic Simulation Of Plasma Interaction With Plasma Facing Components In Fusion Reactors
… <p>The deuterium bombardment of monocrystalline tungsten was modeled by LAMMPS code using Tersoff type interatomic potential. The deuterium trapping rate, implantation depth, and stopping time in 600-2000 K tungsten bombarded by 5-100 eV deuterium atoms were simulated. Irradiated monocrystalline …