In the paper we present our recent findings on electron field emission studies from novel nanostructured materials. Since angular distribution can not be obtained in one UHV system, the sample is transferred into another system where angular distribution is recorded. One of the most relevant findings is that investigated nanowires synthesized exhibit very high reduced brightness, similar as reported for carbon nanotubes. Recently, we upgraded our XPS instrument to record energy distribution from an individual emitter which will give even easier achievement of electron energy distribution.
COBISS.SI-ID: 21580327
Main findings in the topic relevant for better understanding of interaction of deuterium with ITER grade stainless steel, which is planned to be applied for the giant vacuum chamber of fusion reactor ITER. Our goal was to determine deuterium retention at prescribed low pressure in 24 hour exposures. It was expected that values are within the limit of present day experimental methods. Anyway, it was evidently shown that the reaction is slow since both the absorption and recombination are second order reactions that govern the kinetics over the whole experiment.
COBISS.SI-ID: 22072359
A novel robust method of data fitting was developed for dealing with extensive data bases, contaminated by a large fraction of outliers. The best-fit parameters are obtained on the subset having the maximum value of the density of least squares.The efficacy of the novel tool is demonstrated on the estimation of spectral line parameters and determination of thermodynamic temperature. The procedure is sustained by the original FORTRAN90 source code of the routine that implements the DLS method and is available to users in electronic form via anonymous ftp (http://cdsweb.u-strasbg.fr).
COBISS.SI-ID: 825595
Self-organised patterning of polycrystalline metal films by off-normal defocused Ar ion beam was investigated. Data demonstrates that a nonflat initial surface morphology plays a critical role in triggering self-organization during the early stages, governed by a nonstochastic spatial modulation of the ion impact sites. A crossover to the conventional erosive regime observed for single crystals sets in at longer sputtering times. The vertical modulation of the original film surface profile results in a substantial reduction in the ion dose required for the formation of the nanoscale patterns.
COBISS.SI-ID: 693418
Solid solutions of lithium in Ag and Cu in the form of balls, wires, or strips are convenient sources for depositing lithium films as getters on the walls of vacuum vessels. Measurement of the O2, CO and CO2 sorption characteristics have shown that these films(generated electrothermally from Ag/Li solid solutions) excel the best getters of the Ba-film type or the high porosity getters based on Ti, V and Zr alloys. It has been found that tight lithium films passivate as a sorption depth of approximately 10 nm is reached.
COBISS.SI-ID: 618666