1. Initial oxidation of low index Mg surfaces investigated by SCLS and DFTZhe Xing, Mattia Fanetti, Sandra Gardonio, Elsebeth Schröder, Dmytro Orlov, 2024, original scientific article Keywords: oxidation mechanism, surface core level shift, density functional theory, surface reconstruction, magnesium oxidation
Published in RUNG: 25.07.2024; Views: 750; Downloads: 3
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2. Update of the Offline Framework for AugerPrimeL. Nellen, Andrej Filipčič, Jon Paul Lundquist, Samo Stanič, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, Lukas Zehrer, 2022, published scientific conference contribution Abstract: Work on the Offline Framework for the Pierre Auger Observatory was
started in 2003 to create a universal framework for event
reconstruction and simulation. The development and installation of
the AugerPrime upgrade of the Pierre Auger Observatory require an
update of the Offline Framework to handle the additional detector
components and the upgraded Surface Detector Electronics.
The design of the Offline Framework proved to be sufficiently
flexible to accommodate the changes needed to be able to handle the
AugerPrime detector. This flexibility has been a goal since the
development of the code started. The framework separates data
structures from processing modules. The detector components map
directly onto data structures. It was straightforward to update or
add processing modules to handle the additional information from
the new detectors.
We will discuss the general structure of the Offline Framework,
explaining the design decisions that provided its flexibility and
point out the few of the features of the original design that
required deeper changes, which could have been avoided in
hindsight. Given the disruptive nature of the AugerPrime upgrade,
the developers decided that the update for AugerPrime was the moment
to change also the language standard for the implementation and move
to the latest version of C++, to break strict backward compatibility
eliminating deprecated interfaces, and to modernize the development
infrastructure. We will discuss the changes that were made to the
structure in general and the modules that were added to the
framework to handle the new detector components.
Keywords: Pierre Auger Observatory, AugerPrime, indirect detection, surface detection, ground array, fluorescence detection, ultra-high energy, cosmic rays, event reconstruction, simulation, software framework
Published in RUNG: 04.10.2023; Views: 1707; Downloads: 6
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3. Telescope Array Surface Detector Energy and Arrival Direction Estimation Using Deep LearningO. Kalashev, Jon Paul Lundquist, 2022, published scientific conference contribution Abstract: A novel ultra-high-energy cosmic rays energy and arrival direction reconstruction method for Telescope Array surface detector is presented. The analysis is based on a deep convolutional neural network using detector signal time series as the input and the network is trained on a large Monte-Carlo dataset. This method is compared in terms of statistical and systematic energy and arrival direction determination errors with the standard Telescope Array surface detector event reconstruction procedure.
Keywords: Telescope Array, indirect detection, surface detection, ground array, ultra-high energy, cosmic rays, energy, arrival directions, reconstruction, machine learning, neural network
Published in RUNG: 04.10.2023; Views: 1427; Downloads: 8
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4. Reconstruction of Vertical Events Recorded by the Surface Detector of the Pierre Auger ObservatoryDaniela Mockler, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Marta Trini, Serguei Vorobiov, Lili Yang, Danilo Zavrtanik, Marko Zavrtanik, Lukas Zehrer, 2019, published scientific conference contribution Keywords: ultra-high energy cosmic rays (UHECRs), Pierre Auger Observatory, Auger Surface Detector, vertical UHECR events, event reconstruction
Published in RUNG: 24.07.2020; Views: 3349; Downloads: 83
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5. Characterization of Mg low-index surfaces by first-principlesMiha Gunde, 2017, master's thesis Abstract: In this work, three surfaces, namely, Mg(0001), Mg(10 ̄1 0) and Mg(11 ̄2 0) are investigated by means of Density Functional Theory and Generalized Gradient Approximation first-principle calculations. The surfaces have been characterized in terms of their interlayer distances, surface energies, Projected Density of States and Surface Core Level Shifts. Contrary to what was found in previous studies based on Density Functional Theory-Local Density Approximation, the use of Generalized Gradient Approximation exchange correlation functional unravels the oscillatory behavior of both interlayer distances and Surface Core Level Shifts of Mg(10 ̄1 0). Moreover,
the Projected Density Of States of un-reconstructed Mg(11 ̄2 0) exhibit the typical quantisation of electronic levels associated to a 2D-confinement of a 3D nearly-free electron gas, as observed in nano-wires, and a Peierls instability along the unconfined direction. Different possible reconstructions on Mg(11 ̄2 0) have then been investigated. In particular, it is found that the
surface energy of (2X1) and (3X1) reconstructions is almost degenerate and lower than the surface energy of the unreconstructed Mg(11 ̄2 0) surface. Because of the quasi-degeneracy of surface energies, Mg(11 ̄2 0) surface should be composed by a combination of all the quasi degenerate phases.
Keywords: Density Functional Theory, first-principle calculations, Mg surface, Surface Core-Level Shift, surface relaxation, surface reconstruction
Published in RUNG: 04.07.2017; Views: 6782; Downloads: 2111
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6. Impact of atmospheric effects on the energy reconstruction of air showers observed by the surface detectors of the Pierre Auger ObservatoryA. Aab, Andrej Filipčič, Gašper Kukec Mezek, Ahmed Saleh, Samo Stanič, Marta Trini, Darko Veberič, Serguei Vorobiov, Lili Yang, Danilo Zavrtanik, Marko Zavrtanik, 2017, original scientific article Keywords: Pierre Auger Observatory (PAO), PAO Surface Detector, energy reconstruction, atmospheric effects
Published in RUNG: 16.02.2017; Views: 4909; Downloads: 0
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