Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Ultra high energy"”.
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Volumetric creation of ultra-high-energy-density plasma by irradiation of ordered nanowire arrays
Creating appreciable volumes of Ultra-High-Energy Density (UHED) matter in the laboratory is a challenge. Recent developments in the fabrication of vertically aligned nanowire array targets, in coordination with ultra-high-contrast femtosecond laser pulses focused to relativistic intensity, have …
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Using power spectra to look for anisotropies in ultra-high energy cosmic ray distributions
The origins and compositions of ultra-high energy cosmic rays (UHECR) remains a mystery to this day. The Pierre Auger Observatory (PAO) is being constructed now in the hopes that it will help solve this mystery by detecting more UHECR than any previous experiment. In this dissertation, I will …
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Design And Development Of An Autonomous Radar Receiver For The Detection Of Ultra High Energy Cosmic Rays
The detection of ultra-high energy cosmic rays is constrained by their flux, requiring detectors with apertures of hundreds or even thousands of square kilometers and close to one hundred percent duty cycle. The sheer scale that would be required of conventional detectors, to acquire sufficient …
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Propagation of Ultra-High Energy Cosmic Rays and anisotropy studies with the Pierre Auger Observatory: the multiscale approach
… the investigation of the arrival directions of ultra-high energy cosmic rays (UHECRs). The clustering of such events, collected by the Pierre Auger Observatory, is used to infer the nature of sources and their density, as well as other physical unknowns. Results are based on the comparison …
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All-Sky Search for Neutrinos Correlated with Gamma-Ray Bursts in Extended Time Windows Using Eight Years of IceCube Data
… as potential sources of hadronic acceleration of ultra-high energy cosmic rays and, more recently, as potential sources of the diffuse neutrino flux measured by IceCube. This thesis presents a search for neutrinos correlated with 2,091 gamma-ray bursts (GRBs) in prompt and extended time windows …
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Design, Implementation and First Results of the ANITA-HiCal Experiment
… goal of the ANITA experiment is to detect UHE (Ultra-High Energy) neutrinos $(10^9$ to $10^{13}$ GeV) and cosmic rays through the RF (Radio-Frequency) emission of in-ice and atmospheric particle showers initiated, respectively, by these two types of particles. Radio detection of ultra-high …
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On the fabrication and utilization of vertically aligned single walled carbon nanotube structures
… through controlled acid etch and for creating highly dense structures of aligned nanotubes from carpets by liquid processing are presented. One of the most promising, near-term applications for nanotube carpets is as the basis for a solid-state, ultra-high energy/ultra-high power …
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Stabilizing energy reconstructions of the surface detector at the Pierre Auger Observatory
At the Pierre Auger Observatory, ultra-high energy cosmic rays are measured through indirect measurements of the extensive air showers they induce. Accordingly, an energy reconstruction process must be undertaken. For the surface detector, the models utilized for energy reconstruction are empirical …
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Superconducting gamma-detectors for non-destructive analysis in nuclear safeguards
Ultra-high energy resolution superconducting gamma ray detectors operated at temperatures of 0. 1 K can improve the accuracy of non-destructive analysis of nuclear materials. These detectors offer an order of magnitude improvement in resolution over conventional high-purity germanium detectors. The …
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Multi-pixel charge sharing energy reconstruction (MCSER) algorithm with application in small-pixel semiconductor detectors
… paper, we discuss a multi-pixel charge sharing energy reconstruction (MCSER) algorithm that could be used to enhance the spectral performance of the small-pixel CdTe/CZT semiconductor detectors. This algorithm, by exploiting the patterns of charge sharing between adjacent pixels, allows for an …
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INVESTIGATING THE ORIGINS OF UHECRS USING THE PIERRE AUGER OBSERVATORY AND PALEO-DETECTORS
… the origins of cosmic rays is the toe of the ultra-high energy cosmic ray (UHECR) spectrum, above ≈ 50 EeV. The potential for small magnetic deflections at these energies is coupled with the presence of flux suppression, which may be a sign of the sources’ maximum acceleration potential or may …
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Extreme universe space observatory on a super pressure balloon II fluorescence telescope on the ground and (briefly) in the air, The
… signatures for such observations as well as high energy cosmic rays above the limb. The fluorescence telescope (FT) utilizing multi-anode photomultiplier tubes capable of discriminating single photons, aimed to measure ultra-high energy cosmic ray (UHECR) induced extensive air showers (EAS) …
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FROM DATA PRODUCTION TO SEARCH FOR GALACTIC COSMICRAY SOURCES WITH THE PIERRE AUGER OBSERVATORY
… astrophysics and particle physics, investigates ultra-high-energy cosmic rays (UHECRs), the most energetic particles known in the Universe. Despite decades of research, their origins remain elusive. These particles are detected through extensive air showers, cascades of secondary particles …
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Targets of opportunity source catalog, prioritization, scheduler and related mechanics for the EUSO-SPB2 mission, The
… Balloon 2 (EUSO-SPB2) was developed to observe ultra high energy cosmic rays and very high energy (VHE) neutrinos from suborbital space. These earth-skimming VHE tau-neutrinos can interact with the Earth’s limb to produce tau leptons which can exit the Earth and decay to initiate extensive air …
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Investigating Extended Gamma-Ray Sources with ASTRI and CTAO: Observation, Analysis and Modelling
… of Galactic sources in the multi-TeV energy regime. The first part focuses on the characterization of ASTRI, using Monte Carlo simulations to test the analysis chain and to benchmark sensitivity. The point-spread function (PSF) was derived from both simulations and real data from the …
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Investigating Extended Gamma-Ray Sources with ASTRI and CTAO: Observation, Analysis and Modelling
… of Galactic sources in the multi-TeV energy regime. The first part focuses on the characterization of ASTRI, using Monte Carlo simulations to test the analysis chain and to benchmark sensitivity. The point-spread function (PSF) was derived from both simulations and real data from the …
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Implementation of a Custom Muon High Level Trigger Monitoring System
… nucleus-proton or proton-nucleus collisions at ultra high energy densi- ties, where the Quark Gluon Plasma (QGP) is expected to form. The experiment is expected to produce data at very high rates of about 25 Gbytes/s however the bandwidth to permanent storage is limited to about 10% (1.25 …
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