A model for simulating the diffusive evaporation of lithium into a helium filled NSTX vacuum vessel is described and validated against an initial set of deposition experiments. The DEGAS 2 based model consists of a three-dimensional representation of the vacuum vessel, the elastic scattering process, and a kinetic description of the evaporated atoms. Additional assumptions are required to accou...

Using a pulsed electron beam evaporation in vacuum mesoporous nanopowder CaF 2 with specific surface area up to 60.5 m /g were produced. The effect of annealing different media on the evolution magnetic and texture properties nanoparticles has been studied. For first time, medium magnetization nanopowders was discovered. Keywords: nanopowders, calcium fluoride, ferromagnetism, evaporation.

We explore possible effects of vacuum energy on the evolution of black holes. If the universe contains a cosmological constant, and if black holes can absorb energy from the vacuum, then black hole evaporation could be greatly suppressed. For the magnitude of the cosmological constant suggested by current observations, black holes larger than ∼ 4× 10 g would accrete energy rather than evaporate...

Malt extract is a highly viscous, rich in sugars, water-based solution. It is produced by means of vacuum evaporation of a sugar solution (mash) in the brewing industry. It is a natural flavour and colorant and is widely used in baking, confectionery, breakfast cereals, malt beverages, dairy products, sauces and as a caramel substitute. The difficult handling and dosing of that viscous liquid p...

This work is concerned with challenges in optimizing optical metamaterials with a negative effective permeability and a negative effective permittivity (double-negative metamaterials, DNM). We demonstrate the huge importance of linking the fabrication parameters and the results of optical and structural characterization of fabricated prototypes with a given optimal design environment. Specifica...