A5087928692- Laser-induced spectroscopy and plasma
- Vehicle emissions and performance
- Analytical chemistry methods development
- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Advanced Combustion Engine Technologies
- Air Quality and Health Impacts
- Spectroscopy and Laser Applications
- Cultural Heritage Materials Analysis
- Air Quality Monitoring and Forecasting
- Catalytic Processes in Materials Science
- Mercury impact and mitigation studies
- Biodiesel Production and Applications
- Diamond and Carbon-based Materials Research
- Ion-surface interactions and analysis
- Laser Design and Applications
- ZnO doping and properties
- Combustion and Detonation Processes
- Advanced Measurement and Detection Methods
- Advanced Surface Polishing Techniques
- Electronic and Structural Properties of Oxides
- Atmospheric chemistry and aerosols
- Advanced Fiber Laser Technologies
- Environmental Policies and Emissions
- Atomic and Molecular Physics
Johannes Kepler University of Linz
2009-2020
Northumbria University
2020
University of Gujrat
2020
Wrocław University of Science and Technology
2020
AGH University of Krakow
2020
Instituto de Salud Carlos III
2020
Obafemi Awolowo University
2020
Indian Institute of Technology Indore
2019
University of Nottingham
2019
Handong Global University
2016
Photon acceleration is the phenomenon whereby a light wave changes color when propagating through medium whose index of refraction in time. This concept can be used to describe spectral experienced by electromagnetic waves they propagate spatially and temporally varying plasmas. In this paper detection large-amplitude laser-driven wake field reported for first time, demonstrating photon acceleration. Several features characteristic fields, such as splitting main peak asymmetries between...
Iron oxide Fe2O3 nano-particle powder is investigated by laser-induced breakdown spectroscopy (LIBS). Laser ablation of loose (density 0.43 g cm−3) leads to the ejection particles and generates a plasma channel along laser beam path. LIBS spectra are obtained spatially integrated time-gated measurement in flushed N2 gas background. A simple delivery system allows for investigation directly without any pre-treatment fixation material. The Saha–Boltzmann analysis yields temperature T = (10250...
The production of monoenergetic electron beams by two copropagating ultrashort laser pulses is investigated both experiment and using particle-in-cell simulations. By proper timing between guiding driver pulses, a high-amplitude plasma wave generated sustained for longer than possible with either the individually, due to waveguiding pulse. growth inferred measurement low divergence that are not measured individually. This scheme can be easily implemented may allow more control interaction...
In the experiments reported here, filamentation of ultrashort laser pulses, due to non-optimal choice focusing geometry and/or electron number density, has a severely deleterious effect on monoenergetic beam production in wakefield accelerators. Interactions with relatively small focal spots, w0 < λp/2, and pulse length cτ ≈ λp, incur fragmentation into large low power filaments. These filaments are modulated density dependent size of, average, close λp. The break-up driving results shorter...
In this research we apply a high-resolution optical emission spectroscopy technique for spectrochemical analysis of collected diesel particulate matter. We use the laser-induced breakdown (LIBS) qualitative and quantitative measurements major chemical elements present in matter generated from different engine passenger vehicles use. The LIBS can instantly measure within diverse matrices.
The interaction of high intensity laser pulses with underdense plasma is investigated experimentally using a range parameters and energetic electron production mechanisms are compared. It clear that the physics these interactions changes significantly depending not only on but also pulse length. For in picosecond duration regime electrons highly correlated waves. However as intensities increased peak acceleration increases beyond which can be produced from single stage wave direct must...
The use of laser-induced breakdown spectroscopy (LIBS) for the sorting polymers containing heavy metal impurity is investigated. Our main attention directed towards detection cadmium and lead in real-life waste materials certified reference polymer materials. UV (193 nm ArF) IR (1064 Nd:YAG) laser radiation employed ablation plasma generation air. LIBS spectra are measured / VIS range by using an Echelle spectrometer equipped with ICCD camera. Spectra compared different lasers. Sorted...
The physics of the interaction high-intensity laser pulses with underdense plasma depends not only on intensity but also pulse length. We show experimentally that as intensities are increased beyond 10 20 W cm −2 peak electron acceleration increases which can be produced from single stage wave and it is likely direct mechanisms begin to play an important role. If, alternatively, length reduced such approaches period a relativistic wave, high-power interactions at much lower enable generation...
The contribution of transient emissions to total is becoming more important in view the improvement steady state and after-treatment systems. For a critical pollutant, namely soot, there no commercially available measurement system able measure sufficiently fast on production engines. This paper presents setup based in-situ Laser Induced Incandescence (LII) allowing high speed, frequent soot measurements engine. consists pulsed laser system, optical detector special, compact designed LII...
Abstract The article describes and compares the sensitivity dynamics of two fast measurement techniques for transient particulate matter (PM) emission from diesel engine. laser induced incandescence was used as a based method, together with differential mobility spectrometer rapid soot characterization. main task is to reveal most accurate device emissions. obtained results will allow better understanding PM formation support dynamic modelling well control design combustion process.
In this research we apply Laser Induced Breakdown Spectroscopy (LIBS) technique for high resolution spectrochemical analysis of Diesel Particulate Matter - DPM exhaust emissions. has been collected from real, on road Light Duty Vehicles, driven by combustion engine. We have concerned with the main chemical elements, presents in various type real particulate matter. From LIBS measurements, it shown, that plasma electron density can be use basic classification different types matrices. The...