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2953. Družbeno odgovorna uporaba znanj in tehnologij : 5. znanstvena konferenca VIVUS 2018Drago Papler, 2018, poljudni članek Ključne besede: družbena odgovornost, trajnostni razvoj, znanje, tehnologije, energetika, gospodarstvo, ekologija, razvoj, obnovljivi viri energije, hidroelektrarne, upravljanje, odpadki
Objavljeno v RUNG: 19.05.2020; Ogledov: 2827; Prenosov: 0 |
2954. Vodni energetski potencial reke KokreDrago Papler, 2018, strokovni članek Ključne besede: hidroelektrarne, električna energija, proizvodnja, obnovljivi viri, hidrologija, pretoki voda, statistična analiza, trajnostni razvoj, zgodovina, elektrifikacija
Objavljeno v RUNG: 19.05.2020; Ogledov: 2799; Prenosov: 0 |
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2957. Še več elektrike, še več omrežjaDrago Papler, 2018, predgovor, uvodnik, spremna beseda Ključne besede: energetski sistemi, elektroenergetika, električna energija, omrežja, razvoj, tehnologije, kakovost, oskrba, zanesljivost, monitoring, regulacija, obnovljivi viri, sistemske storitve, odjemalci, izobraževanje, kadri
Objavljeno v RUNG: 19.05.2020; Ogledov: 2495; Prenosov: 0 |
2958. Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-High Energy Cosmic RaysR. Abbasi, Jon Paul Lundquist, 2020, izvirni znanstveni članek Opis: Evidence for a large-scale supergalactic cosmic ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high energy cosmic ray (UHECR) energies above 10^19 eV using seven years of data from the Telescope Array (TA) surface detector and updated to 10 years. Previous energy-position correlation studies have made assumptions regarding magnetic field shapes and strength, and UHECR composition. Here the assumption tested is that, since the supergalactic plane is a fit to the average matter density of the local Large Scale Structure (LSS), UHECR sources and intervening extragalactic magnetic fields are correlated with this plane. This supergalactic deflection hypothesis is tested by the entire field-of-view (FOV) behavior of the strength of intermediate-scale energy-angle correlations. These multiplets are measured in spherical cap section bins (wedges) of the FOV to account for coherent and random magnetic fields. The structure found is consistent with supergalactic deflection, the previously published energy spectrum anisotropy results of TA (the hotspot and coldspot), and toy-model simulations of a supergalactic magnetic sheet. The seven year data post-trial significance of this supergalactic structure of multiplets appearing by chance, on an isotropic sky, is found by Monte Carlo simulation to be 4.19σ. The ten years of data post-trial significance is 4.09σ. Furthermore, the starburst galaxy M82 is shown to be a possible source of the TA Hotspot, and an estimate of the supergalactic magnetic field using UHECR measurements is presented.
Ključne besede: astroparticle physics, cosmic rays, UHECR, supergalactic plane, multiplets, magnetic deflection, large-scale structure of universe
Objavljeno v RUNG: 19.05.2020; Ogledov: 2827; Prenosov: 0
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2959. New air fluorescence detectors employed in the Telescope Array experimentH. Tokuno, Jon Paul Lundquist, 2012, izvirni znanstveni članek Opis: Since 2007, the Telescope Array (TA) experiment, based in Utah, USA, has been observing ultra high energy cosmic rays to understand their origins. The experiment includes a surface detector (SD) array and three fluorescence detector (FD) stations. The FD stations, installed surrounding the SD array, measure the air fluorescence light emitted from extensive air showers (EASs) for precise determination of their energies and species. The detectors employed at one of the three FD stations were relocated from the High Resolution Fly's Eye (HiRes) experiment. At the other two stations, newly designed detectors were constructed for the TA experiment. An FD consists of a primary mirror and a camera equipped with photomultiplier tube pixels. To obtain the EAS parameters with high accuracy, understanding the FD optical characteristics is important. In this paper, we report the characteristics and installation of the new FDs and the performances of the FD components. The results of the monitored mirror reflectance during the observation time are also described in this report.
Ključne besede: Ultra high energy cosmic rays, Extensive air showers, Air fluorescence light detectors
Objavljeno v RUNG: 19.05.2020; Ogledov: 2559; Prenosov: 0
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2960. CORSIKA Simulation of the Telescope Array Surface DetectorT. Abu-Zayyad, Jon Paul Lundquist, 2014, izvirni znanstveni članek Opis: The Telescope Array is the largest experiment studying ultra-high energy cosmic rays in the northern hemisphere. The detection area of the experiment consists of an array of 507 surface detectors, and a fluorescence detector divided into three sites at the periphery. The viewing directions of the 38 fluorescence telescopes point over the air space above the surface array. In this paper, we describe a technique that we have developed for simulating the response of the array of surface detectors of the Telescope Array experiment. The two primary components of this method are (a) the generation of a detailed CORSIKA Monte Carlo simulation with all known characteristics of the data, and (b) the validation of the simulation by a direct comparison with the Telescope Array surface detector data. This technique allows us to make a very accurate calculation of the acceptance of the array. We also describe a study of systematic uncertainties in this acceptance calculation.
Ključne besede: cosmic ray, extensive air shower, simulation, surface detector
Objavljeno v RUNG: 19.05.2020; Ogledov: 2574; Prenosov: 0
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