A5021767901- Plasma Diagnostics and Applications
- Metal and Thin Film Mechanics
- Magnetic confinement fusion research
- Plasma Applications and Diagnostics
- Laser-induced spectroscopy and plasma
- Diamond and Carbon-based Materials Research
- Electrohydrodynamics and Fluid Dynamics
- Atomic and Molecular Physics
- Particle accelerators and beam dynamics
- Vacuum and Plasma Arcs
- Spectroscopy and Laser Applications
- Advanced Chemical Physics Studies
- Dust and Plasma Wave Phenomena
- Magnetic Field Sensors Techniques
- ZnO doping and properties
- Ion-surface interactions and analysis
- Digital Filter Design and Implementation
- nanoparticles nucleation surface interactions
- Mass Spectrometry Techniques and Applications
- Semiconductor materials and devices
- Advanced Adaptive Filtering Techniques
- Numerical Methods and Algorithms
- Atmospheric Ozone and Climate
- Laser-Ablation Synthesis of Nanoparticles
- Quantum, superfluid, helium dynamics
Charles University
2015-2024
National Research Tomsk State University
2017-2019
Tomsk Polytechnic University
2017-2019
Czech Academy of Sciences, Institute of Information Theory and Automation
2002-2011
Universität Greifswald
2003-2010
Leibniz Institute for Plasma Science and Technology
2010
Gdańsk University of Technology
2010
Czech Academy of Sciences, Institute of Physics
2006-2010
Czech Academy of Sciences
2006-2010
Trinity College Dublin
2006
The seeds of Lamb's Quarters (Chenopodium album agg.) were stimulated by low-pressure discharge. tested exposed to plasma discharge for different time durations (from 6 minutes 48 minutes). Germination tests performed under specified laboratory conditions during seven days in five identical and completely independent experiments. Significant differences between the control plasma-treated observed. treated showed structural changes on surface seat coat. They germinated faster their sprout...
An emissive probe has been used in the edge region of CASTOR tokamak order to test possibility direct measurements plasma potential. The difference between floating potential a cold and that an found be approximately 1.3 times electron temperature, which is less than predicted by theory. Several possible reasons explain this discrepancy are offered, such as secondary emission, uncertainties ion different collecting areas for electrons ions, etc. impact space charge formed emitted also discussed.
Low-pressure discharge is applied for stimulation of germination two seed lots Lamb's Quarters (Chenopodium album agg.) with different starting germinations (17%, 8%) and in stages dormancy. Different exposition durations cold plasma treatment were applied. The variable the ratio cumulative was calculated. Richards' equation used curve-fitting simulation growth curves. Population parameters, namely Vi - viability, Me time, Qu dispersion, Sk skewness, counted from curves described rate well....
Formation of thin TiOx films produced by pulsed planar magnetron sputtering deposition is reported in this paper. The formation process and layer growth were controlled (i) the ratio reactive O2 Ar/O2 working gas mixture (ii) pressure vacuum chamber. magnetron, operated a high-power pulse mode with low repetition frequency 250 Hz, reached maxima peak current Ip ∼ 50 A density peaks at ip 1 cm−2. Particular spectral lines (Ar = 420.07 nm, Ar+ 487.98 Ti 518.96 nm) emitted discharge...
This article presents an experimental study that contributes to the problem of interpretation cylindrical Langmuir probe data obtained in a non-isothermal low-temperature plasma magnetic field. A discussion on influence positive ion - neutral collisions charged particle density estimation is also given and effect demonstrated data. Maxwellian electron energy distribution assumed throughout present study. The are magnetron discharge argon at pressures from 1.5 6 Pa fields between 100 500 G....
The dependences on temperature of the rate coefficients for endothermic proton transfer reactions HBr+ with CO2 and CH4 have been obtained in a variable-temperature selected ion flow tube. measurements used to determine 300 K affinity CO2, P.A.(CO2), =128.5±1.0 kcal mol−1, utilizing literature value P.A.(Br)=131.8 from dissociation energy HBr+, as primary standard. difference between has substantiated by equilibrium constant function CH4. Similar affinities HCl, N2 O, HBr, CO, giving ladder...
Time-resolved comparative study of dual magnetron sputtering (dual-MS) and high power impulse (dual-HiPIMS) systems arranged with closed magnetic field is presented. The dual-MS system was operated a repetition frequency 4.65 kHz (duty cycle ≈50%). during dual-HiPIMS lower as well its duty (f=100 Hz, 1%). Different metallic targets (Ti, Cu) different cathode voltages were applied to get required stoichiometry Ti–Cu thin films. plasma parameters the interspace between magnetrons in substrate...
This review summarizes the more-than-25-years of development so-called thermionic vacuum arc (TVA). TVA is an anodic discharge in vapors material to be deposited; energy for its melting delivered by means a focused electron beam. The resulting ions fall at substrate where they form well-adhesive layer; ion controllable. deposited layers are, as rule, free from droplets typical cathodic deposition systems and thermal stress substrates being coated low. especially suitable processing...
Abstract One of the problems liquid metal tokamak divertor technology is redeposition released on vessel walls. In this work an investigation removal redeposited metals from grounded conducting walls was done by a low-temperature Ar plasma generated electron cyclotron waves, RF-ECWR, at 13.56 MHz in new/modified system with tunable potential. The potential controlled range 0-270 V. control achieved adding additional DC voltage supply ECWR electrode via suitable inductor having high impedance...
In 2000 we described a proposal for logarithmic arithmetic unit, which suggested would offer faster, more accurate alternative to floating-point procedures. Would it in fact do so, and could feasibly be integrated into microprocessor so that the intended benefits might realized? Here, describe European microprocessor, device designed around compare its performance with of commercial superscalar pipelined processor. We conclude experiment has been successful, 32-bit work, may now technique choice.
Optical, photo-electrochemical, crystallographic and morphological properties of TiO2 thin films prepared by high power impulse magnetron sputtering at low substrate temperatures (<65 °C) without post-deposition thermal annealing are studied. The film composition—anatase, rutile or amorphous TiO2—is adjusted the pressure (p ∼ 0.75–15 Pa) in deposition chamber. different phases were determined with grazing incidence x-ray diffractometry. surface morphology size grains/clusters imaged atomic...
The paper is focused on a study of formation TiO x N y thin films prepared by pulsed magnetron sputtering metallic Ti target. Oxygen and nitrogen were delivered into the discharge in form reactive gases O 2 . deposited high-power impulse working with repetition frequency f = 250 Hz at low ( p 0.75 Pa) high 10 pressure. substrates floating potential thermally stabilized room temperature during deposition process. Post-deposition thermal annealing was not employed. chemical composition from...
Abstract We report a study of electron saturation current variations at varying probe heating that were found to be closely related wire contamination. The was performed in three types low temperature argon plasma – the weakly magnetized cylindrical magnetron, non‐magnetized double machine and hollow cathode jet, showing different trends. In present work effect overestimation potential by strongly emitting is discussed experimental data are compared with theoretical model. (© 2008 WILEY‐VCH...
Abstract This article presents a new theoretical model of ion collection by cylindrical Langmuir probe at medium and higher pressures which we call the “modified Talbot Chou model”. The makes use following theories; (a) kinetic theory Chou, Willis [6, 7] (b) Zakrzewski Kopiczynski [10, 11]. basic idea is to calculate decrease current due collisions with neutrals according increase destruction an orbital motion computed results are presented in form graphs suitable for data interpretation...