11 research outputs found
Interaction of antiproton with helium based on ab-initio calculations
We present ionization cross sections for antiproton and helium collisions
based on ab-initio time-dependent coupled channel method. In our calculations a
finite basis set of regular helium Coulomb wave packets and Slater function
were used. The semiclassical approximation was applied with the time-dependent
Coulomb potential to describe the antiproton electron interaction. Three
different projectile energies were considered as 10, 50 and 100 keV. We found
clear evidence for the formation of the anti-cusp in the differential
distributions.Comment: 17 pages and 3*3 figure
Electron Acceleration in Underdense Plasmas Described with a Classical Effective Theory
An effective theory of laser--plasma based particle acceleration is
presented. Here we treated the plasma as a continuous medium with an index of
refraction in which a single electron propagates. Because of the
simplicity of this model, we did not need to perform PIC simulations in order
to study the properties of the electron acceleration. We studied the properties
of the electron motion due to the Lorentz force and the relativistic equations
of motion were numerically solved and analysed. We compared our results to PIC
simulations and experimental data.
Keywords: Underdense plasma; Electron acceleration; Classical
electrodynamics; Relativistic equation of motion; Ultrashort laser pulsesComment: 14 pages, 7 figures. Proceedings to the ECLIM 2014 Conference
(Paris). Submitted to Laser and Particle Beams (Cambridge Journals
Electron Acceleration by a Bichromatic Chirped Laser Pulse in Underdense Plasmas
A theoretical study of laser and plasma based electron acceleration is
presented. An effective model has been used, in which the presence of an
underdense plasma has been taken account via its index of refraction .
In the confines of this model, the basic phenomena can be studied by
numerically solving the classical relativistic equations of motion. The key
idea of this paper is the application of chirped, bichromatic laser fields. We
investigated the advantages and disadvantages of mixing the second harmonic to
the original wavelength pulse. We performed
calculations both for plane wave and Gaussian pulses.Comment: 6 pages, 7 figures. Proceedings to the PIPAMON (2015) conference.
Submitted to NIM-B Special Issue (SI:PIPAMON-2015). Accepted for publication:
7th of October, 201
Theoretical study of steam condensation induced water hammer phenomena in horizontal pipelines
Major and Trace Elements in the Humic Acid
We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample