Dissertationen zum Thema „Kosmische Strahlung“
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Karg, T., A. Schulz, C. Schwerdt und U. Behrens. „Kosmische Strahlung“. Teilchenphysik, 2021. https://tud.qucosa.de/id/qucosa%3A76156.
Der volle Inhalt der QuelleHammer, Gaël. „Belastung des Flugpersonals durch kosmische Strahlung“. [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964454971.
Der volle Inhalt der QuelleBüsching, Ingo. „On the time dependent propagation of cosmic rays“. [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971996164.
Der volle Inhalt der QuelleVandenhirtz, Jörg. „Ein Infrarot-Laser-Positions-Kontroll-System für das AMS Experiment“. [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=965502287.
Der volle Inhalt der QuelleVasilas, Dragoş. „Measurement of light isotopes ratios in the cosmic rays with the IMAX balloon experiment“. [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972319077.
Der volle Inhalt der QuelleMaier, Gernot. „Suche nach Anisotropie in der kosmischen Strahlung mit dem KASCADE-Experiment“. Karlsruhe : FZKA, 2004. http://bibliothek.fzk.de/zb/berichte/FZKA6951.pdf.
Der volle Inhalt der QuelleUlrich, Holger. „Untersuchungen zum primären Energiespektrum der kosmischen Strahlung im PeV-Bereich mit dem KASCADE-Experiment“. Karlsruhe : Forschungszentrum, 2004. http://www.gbv.de/dms/goettingen/387135960.pdf.
Der volle Inhalt der QuelleMüller, Markus. „Untersuchung unbegleiteter Hadronen der kosmischen Strahlung im Bereich bis zu einem PeV“. [S.l. : s.n.], 2003. http://swbplus.bsz-bw.de/bsz106708686abs.htm.
Der volle Inhalt der QuelleNiese, Siegfried. „Die Entdeckung der Kosmischen Strahlung durch Viktor Franz Hess (1883-1964) vor 100 Jahren und ihre Bedeutung bei der Messung geringer Radioaktivitäten“. Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-89935.
Der volle Inhalt der QuelleThe discovery of the cosmic rays by Victor Franz Hess in 1912, the previous achievements and the following discovering of elementary particles are described, which are created in the atmosphere. These particles determine the background of detectors, shielded with heavy metals against natural radioactivity of the vicinity. It is shown, how the cosmic ray caused background is reduced by coincidence, anti - coincidence as well as underground measurements
Pühlhofer, Gerd. „TeV-Gamma-Emission des Supernova-Überrestes Cassiopeia A erster Nachweis mit dem HEGRA-Cherenkov-Teleskop-System /“. [S.l. : s.n.], 2001. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9494923.
Der volle Inhalt der QuelleLampeitl, Hubert. „Untersuchung der ausgedehnten galaktischen Region im Längenbereich zwischen 37 Grad und 43 Grad auf diffuse Gamma-Strahlung und Punktquellen im Energiebereich oberhalb 1 TeV mit dem HEGRA-Tscherenkov-Teleskopsystem“. [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=961578831.
Der volle Inhalt der QuelleAckermann, Markus. „Searches for signals from cosmic point-like sources of high energy neutrinos in 5 years of AMANDA-II data“. Doctoral thesis, [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982713444.
Der volle Inhalt der QuelleLauer, Robert Johannes. „Extending the search for cosmic point sources of neutrinos with IceCube beyond PeV energies and above the horizon“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16177.
Der volle Inhalt der QuelleSearching for point-like neutrino signals provides a chance of identifying astrophysical particle accelerators as sources of cosmic rays. An established approach to realise high energy neutrino astronomy is the observation of Cherenkov radiation from induced muon tracks in subsurface detectors. Presented here is an analysis based on data taken between 2007 and 2008 with IceCube, the largest of these neutrino telescopes. Neutrino point source searches had been so far restricted to one hemisphere, due to the exclusive selection of upward going events as a way of rejecting the atmospheric muon background. This work demonstrates that the region above the horizon can be included by suppressing the background through an energy-sensitive event selection. The approach improves the sensitivity above PeV energies, previously not accessible at all due to absorption of neutrinos from below the horizon. Both celestial hemispheres were scanned to identify neutrino fluxes from individual directions. Based on model predictions for Active Galactic Nuclei, separate tests were performed by compiling a list of specific neutrino source candidates and by searching for short neutrino flares from the blazar 3C279. No significant excesses above the atmospheric background were found. The resulting upper limits on neutrino fluxes are the first that cover point sources in the southern sky up to the EeV energy range. For certain source candidates, these limits provide the best constraints on models predicting neutrinos above PeV energies. Based on the same event sample, a search for correlations between neutrinos and the most energetic charged cosmic rays was performed. The arrival directions of air showers, reported by the HiRes experiment and the Pierre Auger Observatory, were used to determine such coincidences. The result of this study is compatible with the background hypothesis.
Klepser, Stefan. „Reconstruction of extensive air showers and measurement of the cosmic ray energy spectrum in the range of 1 - 80 PeV at the South Pole“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15790.
Der volle Inhalt der QuelleIceTop is a square-kilometer scale detector array for highly energetic cosmic radiation. It is a part of the IceCube Observatory that is presently being built at the geographic South Pole. It aims for the detection of huge particle cascades induced by PeV cosmic rays in the atmosphere. This thesis presents the first analysis of highly energetic cosmic ray data taken with IceTop. First, the light response of the IceTop tanks is parametrised as a function of energy and particle type. An expectation function for the distribution of shower signals in the detector plane is developed. Based on that, a likelihood reconstruction algorithm is developed and its resolution and performance is studied. The resulting energy response of the array is investigated to set up response matrices for different primary nuclei and inclinations. Two unfolding algorithms are implemented, and response matrices are modeled for four different composition assumptions. With each assumption, energy spectra are unfolded for three different bins in inclination, using a data sample taken in August 2007. The range of the spectrum is 1-80PeV. Finally, a new analysis method is developed that uses the fact that cosmic rays in the PeV range are expected to be isotropic. It is shown that this requirement can be used for a likelihood estimation that is sensitive to composition without using additional information from other detector components. The analysis shows a clear preference of the mixed composition models over pure proton or iron assumption. The spectrum with the highest likelihood shows good agreement with results from other experiments within the systematic uncertainties. The found position of the so-called knee feature is 3.1+-0.3(stat.)+-0.3(sys.)PeV, the power indices before and after that are -2.71+-0.07(stat.) and -3.110+-0.014(stat.)+-0.08 (sys.).
Voigt, Bernhard. „Sensitivity of the IceCube detector for ultra-high energy electron-neutrino events“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15850.
Der volle Inhalt der QuelleIceCube is a neutrino telescope currently under construction in the glacial ice at South Pole. At the moment half of the detector is installed, when completed it will instrument 1 km^3 of ice providing a unique experimental setup to detect high energy neutrinos from astrophysical sources. In this work the sensitivity of the complete IceCube detector for a diffuse electron-neutrino flux is analyzed, with a focus on energies above 1 PeV. Emphasis is put on the correct simulation of the energy deposit of electromagnetic cascades from charged-current electron-neutrino interactions. Since existing parameterizations lack the description of suppression effects at high energies, a simulation of the energy deposit of electromagnetic cascades with energies above 1 PeV is developed, including cross sections which account for the LPM suppression of bremsstrahlung and pair creation. An attempt is made to reconstruct the direction of these elongated showers. The analysis presented here makes use of the full charge waveform recorded with the data acquisition system of the IceCube detector. It introduces new methods to discriminate efficiently between the background of atmospheric muons, including muon bundles, and cascade signal events from electron-neutrino interactions. Within one year of operation of the complete detector a sensitivity of 1.5*10^-8 E^-2 GeV/(cm^2 sr s) is reached, which is valid for a diffuse electron-neutrino flux in the energy range from 16 TeV to 13 PeV. Including all neutrino flavors in this analysis, an improvement of at least one order of magnitude is expected, reaching the anticipated performance of a diffuse muon analysis.
Kislat, Fabian. „Measurement of the energy spectrum of cosmic rays with the 26 station configuration of the IceTop detector“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2012. http://dx.doi.org/10.18452/16443.
Der volle Inhalt der QuelleIceTop is an air shower array at the geographic South Pole. It is the surface component of the IceCube neutrino telescope. Since its completion in December 2010, IceTop consists of 81 detector stations covering an area of 1km². In this dissertation, an analysis of data taken in 2007 with 26 IceTop stations operational at that time is presented. Air showers were reconstructed in order to determine the location of the shower core, their direction and the shower size. The relation between primary energy and shower size was determined from Monte Carlo simulations. An assumption was made about the chemical composition of cosmic rays. The information obtained in these simulations were then used to unfold the spectrum of measured shower sizes in order to obtain the all-particle cosmic ray energy spectrum. This was done independently for particles from three different zenith angle intervals. The result of the unfolding depends on the assumed primary composition. Due to the isotropy of cosmic rays, results obtained in different zenith angle intervals must agree. It has already been shown that this requirement can be used to constrain the range of possible assumptions on the chemical composition of primary particles. Good agreement of spectra from different zenith angle ranges has been found under the assumption of pure proton primaries, as well as for a mixture of protons and iron with a relatively large proton contribution at low energies and proton dominance at high energies. Under these assumptions the knee of the cosmic ray energy spectrum has been observed at energies between 3.97 and 4.20PeV. The spectral index below the knee is about -2.7 and varies between -3.08 and -3.15 above the knee. Pure iron as primary particles can be excluded at a high confidence level below 25PeV. Independent of the primary composition assumption a flattening of the energy spectrum with an index of about -3.0 has been observed above 30PeV.
Leuthold, Matthias J. „Search for cosmic high energy neutrinos with the AMANDA-B10 detector“. Doctoral thesis, [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963183109.
Der volle Inhalt der QuelleFleischhack, Henrike. „Measurement of the iron spectrum in cosmic rays with the VERITAS experiment“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2017. http://dx.doi.org/10.18452/17691.
Der volle Inhalt der QuelleThe energy spectrum of cosmic rays can provide important clues as to their origin and propagation. Different experimental techniques have to be combined to cover the full energy range: Direct detection experiments at lower energies and indirect detection via air showers at higher energies. In addition to detecting cosmic rays at Earth, we can also study them via the electromagnetic radiation, in particular gamma rays, that they emit in interactions with gas, dust, and electromagnetic fields near the acceleration regions or in interstellar space. In the following I will present two studies, both using data taken by the imaging air Cherenkov telescope (IACT) VERITAS. First, I present a measurement of the cosmic ray iron energy spectrum. I use a novel template likelihood method to reconstruct the primary energy and arrival direction, which is for the first time adapted for the use with iron-induced showers. I further use the presence of direct Cherenkov light emitted by charged primary particles before the first interaction to identify iron-induced showers, and a multi-variate classifier to measure the remaining background contribution. The energy spectrum of iron nuclei is well described by a power law in the energy range of 20 to 500 TeV. Second, I present a search for gamma-ray emission above 100 GeV from the three star-forming galaxies Arp 220, IRAS 17208-0014, and IC342. Galaxies with high star formation rates contain many young and middle-aged supernova remnants, which accelerate cosmic rays. These cosmic rays are expected to interact with the dense interstellar medium in the star-forming regions to emit gamma-ray photons up to very high energies. No gamma-ray emission is detected from the studied objects and the resulting limits begin to constrain theoretical models of the cosmic ray acceleration and propagation in Arp 220.
Shalchi, Andreas. „Transport kosmischer Strahlung in der anisotropen magnetohydrodynamischen Turbulenz“. [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=96849014X.
Der volle Inhalt der QuelleSilva, Angel Humberto Cruz. „Search for multiple neutrino flares from Active Galactic Nuclei with the IceCube detector“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17611.
Der volle Inhalt der QuelleActive Galactic Nuclei are among the best candidate sources for high-energy cosmic rays. High-energy neutrinos are expected to be produced in these sources via interactions of cosmic rays with matter or photon fields present in the source vicinity. The resulting neutrino flux may exhibit time variability on the same time scales than the ones observed in the electromagnetic radiation that is emitted from these sources. Time variability can be taken into account in high-energy neutrino searches in order to increase their detection probability with respect to search methods that include only energy and spatial information. In this work, two new methods are developed to look for high-energy neutrino flares emitted from Active Galactic Nuclei: the Multi-flare and Multi-flare stacking method. The Multi-flare method is designed to be sensitive not only to one bright flare emitted from a single source, as considered in other existing search methods, but also to several weak flares that might not be detected individually. This is achieved by developing a likelihood stacking approach that analyzes the cumulative neutrino emission from several flares. This method does not assume a-priori time coincidences with photon flares observed in the electromagnetic spectrum, allowing uncorrelated neutrino emission with different flare durations as considered in some emission models. The Multi-flare stacking method is an extension of the Multi-flare method to include several sources that might be too weak for individual detection. The two search methods are applied to a pre-selected list of Active Galactic Nuclei using data of the IceCube Neutrino Observatory (May-2009 to May 2012). No statistically significant neutrino flares are detected and fluence upper limits are calculated for each selected source. These limits are on average a factor of two better than previous upper limits from single-flare searches.
Mallot, Ann Kathrin. „The energy spectrum of cosmic electrons measured with the MAGIC telescopes“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2017. http://dx.doi.org/10.18452/17698.
Der volle Inhalt der QuelleThe measurement presented in this thesis seeks to provide an increased overlap of the Fermi-LAT and AMS-02 measurement, as well as the very-high-energy H.E.S.S. and VERITAS measurement. The MAGIC telescopes, a stereoscopic system of imaging air-shower Cherenkov telescopes, are a good candidate for such a measurement. They overlap largely with the Fermi-LAT energy range, down to 130 GeV, and extend into the energy range of the H.E.S.S. system, extending the measurement up to 4 TeV. The measurement performed in this thesis uses a non-standard method developed especially for this analysis. It is based on a machine-learning-algorithm which differentiates between hadronic and electro-magnetic air showers. The background needs to be simulated from Monte Carlo protons, which were produced in large quantities for this thesis. As this is an indirect detection method, the systematic uncertainties are much larger than those of the satellite missions. A detailed study of the systematic uncertainties was performed in the scope of this thesis, which prove to be much larger than the statistical uncertainties. The measured spectrum presented here extends from 135 GeV up to 4 TeV. It shows no clear break in the spectrum and is in line with an extension of the single power-law observed by Fermi-LAT and AMS-02. A broken power-law interpretation was disfavored when compared to the single power-law. The final spectrum has a powerlaw index of -3.14+-0.05(stat)+-0.5(syst). Due to the large uncertainties no definitive conclusion can be given at this point. Also, the cutoff seen by H.E.S.S. can not be ruled out. The result presented in this thesis is compatible with the Fermi-LAT and AMS-02 results, however there is minor tension with the H.E.S.S. and VERITAS results around 4 TeV. The limiting factor of the method is the large systematic uncertainty, making it impossible to distinguish between different electron sources for the results presented in this thesis.
Stümpert, Mathias. „Suche nach Anisotropie in der kosmischen Strahlung mit KASCADE-Grande“. Karlsruhe Forschungszentrum Karlsruhe, 2007. http://d-nb.info/989599264/34.
Der volle Inhalt der QuelleRodrigues, Xavier. „Blazars as Sources of Neutrinos and Ultra-high-energy Cosmic Rays“. Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20610.
Der volle Inhalt der QuelleThe origin of ultra-high-energy cosmic rays (UHECRs) is still unclear. Neutrino telescopes like IceCube have observed a flux of high-energy cosmic neutrinos, expected to originate in cosmic ray (CR) interactions. However, their arrival directions do not statistically correlate with the positions of known high-energy astrophysical sources. In this thesis we explore blazars, a class of active galaxies, as potential UHECR accelerators. Motivated by evidence that a fraction of the UHECRs are heavier than protons, we model the interactions of CR nuclei with the photon fields present in blazars, in order to estimate the emitted neutrino and UHECR spectrum. We conclude that in dim blazars, accelerated CRs do not interact efficiently due to the low photon density, but instead escape the source unscathed. In bright blazars, photo-hadronic interactions are more efficient, leading to abundant production of neutrinos and lighter nuclei. We use this model to quantify the neutrino emission from the entire cosmological blazar population. We conclude that low-luminosity blazars currently unobserved but expected theoretically, can explain the entire IceCube flux at the highest energies. We then focus on blazar TXS 0506+056, from whose direction a neutrino was recently detected during an electromagnetic flaring state. We test the hypothesis that a signal of 13+/-5 neutrinos observed by IceCube from the same direction in 2014-15 may have originated in the same source. Given the constraints from multi-wavelength observations, this model can explain at most 5 neutrino events. Finally, we study the remnant of the first neutron star merger ever observed, object GW170817. We model the particle interactions in the source and show that multi-wavelength observations can provide a constraint on the magnetic field strength. We estimate that this source may be an efficient CR emitter, which shows the importance of future multi-messenger observations to better constrain this source type.
Gettert, Michael [Verfasser]. „Messung der Energie von horizontalen Myonen der kosmischen Strahlung / Michael Gettert“. Karlsruhe : KIT-Bibliothek, 1993. http://d-nb.info/1141792478/34.
Der volle Inhalt der QuelleMaier, Gernot. „Suche nach Anisotropie in der kosmischen Strahlung mit dem KASCADE-Experiment /“. [S.l. : s.n.], 2003. http://swbplus.bsz-bw.de/bsz10886166xabs.htm.
Der volle Inhalt der QuelleBiehl, Daniel. „Nuclear Cascades and Neutrino Production in the Sources of Ultra-High Energy Cosmic Ray Nuclei“. Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20448.
Der volle Inhalt der QuelleThe origin of Ultra-High Energy Cosmic Rays (UHECRs) is still one of the most important open questions in astrophysics. Gamma-Ray Bursts (GRBs) were considered as potential sources as they are among the most energetic events known in the Universe. However, conventional GRB scenarios are strongly constrained by astrophysical neutrino data. In addition, cosmic ray composition measurements indicate the presence of heavy nuclei, which would disintegrate if the radiation fields in the source were too dense. In order to circumvent this dilemma, recent studies point towards hidden accelerators, which are intrinsically hard to detect. In this dissertation, we present novel approaches to efficiently and self-consistently calculate the nuclear processes in astrophysical sources. We quantify these interactions by means of the nuclear cascade, which describes the subsequent disintegration of heavy nuclei into lighter fragments. Even in sophisticated source-propagation models, as the ones developed in this thesis, conventional GRBs are in tension with neutrino data. However, we demonstrate that a population of low-luminosity GRBs is not only consistent with current constraints, but can even describe the UHECR spectrum and composition across the ankle as well as neutrino data simultaneously. From our fitting procedure we can further constrain certain source properties, such as the baryonic loading and the event rate. Furthermore, we show that stars disrupted by black holes are viable candidates for a simultaneous description of cosmic ray and PeV neutrino data too. However, they can be discriminated from LLGRBs by cosmogenic neutrinos. Finally, we apply our model to GW170817. We show for different jet scenarios that the expected neutrino flux is orders of magnitude below the sensitivity of current instruments. Nevertheless, binary neutron star mergers could in principle support cosmic rays below the ankle.
Borrmann, Thorsten. „Ein hydrodynamisches 3D-Mehrkomponentenmodell der Heliosphäre und ihrer Wechselwirkung mit kosmischer Strahlung“. [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974923346.
Der volle Inhalt der QuelleStümpert, Mathias [Verfasser]. „Suche nach Anisotropie in der kosmischen Strahlung mit KASCADE-Grande / Mathias Stümpert“. Karlsruhe : Forschungszentrum Karlsruhe, 2008. http://d-nb.info/989599264/34.
Der volle Inhalt der QuelleMielke, Hans-Henning [Verfasser]. „Messung des Energiespektrums von Hadronen in der kosmischen Strahlung / Hans-Henning Mielke“. Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1197077383/34.
Der volle Inhalt der QuelleKnapp, J. [Verfasser]. „Vergleich hadronischer Wechselwirkungsmodelle zur Simulation ausgedehnter Luftschauer der kosmischen Strahlung / J. Knapp“. Karlsruhe : KIT-Bibliothek, 1997. http://d-nb.info/119822035X/34.
Der volle Inhalt der QuelleBüttner, Claudia. „Untersuchung der Elementzusammensetzung der kosmischen Strahlung anhand von Myonlateralverteilungen und rekonstruierten Myonproduktionshöhen /“. [S.l. : s.n.], 2003. http://swbplus.bsz-bw.de/bsz106477013abs.htm.
Der volle Inhalt der QuelleRühle, Christoph [Verfasser], und M. [Akademischer Betreuer] Weber. „Entwicklung eines schnellen eingebetteten Systems zur Radiodetektion kosmischer Strahlung / Christoph Rühle. Betreuer: M. Weber“. Karlsruhe : KIT-Bibliothek, 2013. http://d-nb.info/1050767411/34.
Der volle Inhalt der QuelleWochele, Doris Carola Helga [Verfasser]. „Untersuchung unbegleiteter Hadronen der kosmischen Strahlung mit dem KASCADE Kalorimeter / Doris Carola Helga Wochele“. Karlsruhe : KIT-Bibliothek, 1998. http://d-nb.info/1097380750/34.
Der volle Inhalt der QuellePätsch, Matthias. „Produkte der solaren kosmischen Strahlung in Meteoriten Aufbau und Erprobung einer Laser-Extraktionsanalage für Edelgase /“. [S.l. : s.n.], 2000. http://ArchiMeD.uni-mainz.de/pub/2000/0090/diss.pdf.
Der volle Inhalt der QuelleGabriel, Peter [Verfasser]. „Bestimmung der chemischen Zusammensetzung der kosmischen Strahlung im Energiebereich von E0 = 1015 eV / Peter Gabriel“. Karlsruhe : KIT-Bibliothek, 1992. http://d-nb.info/1153058766/34.
Der volle Inhalt der QuellePorelli, Andrea. „TAIGA-HiSCORE: a new wide-angle air Cherenkov detector for multi-TeV gamma-astronomy and cosmic ray physics“. Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21610.
Der volle Inhalt der QuelleThe TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) detector is a new ground-based Cherenkov detection technology for gamma-astronomy from 10TeV up to several PeV, and cosmic rays (CR) above 100TeV. The main topic of this work is TAIGA-HiSCORE, the wide-aperture air Cherenkov timing array. The focus is on precision extensive air shower (EAS) arrival direction reconstruction, achieved by (1) sub-nsec time-synchronization between the array stations, and (2) a newly developed array time calibration procedure. The performance is verified using simulated and experimental data from EAS, dedicated LED calibration, and a LIDAR laser beam from the International Space Station (ISS). The analysis of the HiSCORE 9 data (2013-14), collected with a data acquisition system (DAQ) based on the White Rabbit (WR) timing system, allows to verify the sub-nsec time synchronization between the array stations. The analysis of HiSCORE 28 data (2015-2018) addresses the problem of achieving an easy-to-perform time calibration for large area ground-based Cherenkov array. A new "hybrid" calibration method is developed, which makes use of EAS data, and requires direct LED calibration of only a few array stations. The "chessboard" method is applied on the reconstructed data to obtain a MC-independent estimation of the detector angular resolution, found to be 0.4° at threshold (~50TeV) and <= 0.2° above 100TeV. A serendipitous discovery was made in this work: a signal from the CATS-LIDAR on-board the ISS was found in the HiSCORE 28 data. These "ISS-events" are used to verify the detector performance, in particular the absolute angular pointing (<= 0.1°), particularly important since a strong gamma point source has not yet been detected by the TAIGA-HiSCORE. The final part of the work presents a first preliminary approach to a wide aperture point source analysis, developed for the TAIGA-HiSCORE in stand-alone operation.
Heinze, Jonas. „Ultra-high-energy cosmic-ray nuclei and neutrinos in models of gamma-ray bursts and extragalactic propagation“. Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21386.
Der volle Inhalt der QuelleUltra-high-energy cosmic rays (UHECRs) are the most energetic particles observed in the Universe. While the astrophysical sources of UHECRs have not yet been uniquely identified, there are strong indications for an extragalactic origin. The interpretation of the observations requires both simulations of UHECR acceleration and energy losses inside the source environment as well as interactions during extragalactic propagation. Due to their extreme energies, UHECR will interact with photons in these environments, producing a flux of secondary neutrinos. This dissertation deals with models of UHECR sources and the accompanying neutrino production in the source environment and during extragalactic propagation. We have developed a new, computationally efficient code, PriNCe, for the extragalactic propagation of UHECR nuclei. The PriNCe code is applied for an extensive parameter scan of a generic source model that is described by the spectral index, the maximal rigidity, the cosmological source evolution and the injected mass composition. In this scan, we demonstrate the impact of different disintegration and air-shower models on the inferred source properties. A prediction for the expected flux of cosmogenic neutrinos is also derived. GRBs are discussed as specific UHECR source candidates in the multi-collision internal-shock model. This model takes the radiation from different radii in the GRB outflow into account. We demonstrate how different assumptions about the initial setup of the jet and the hydrodynamic collision model impact the production of UHECRs and neutrinos. Motivated by the multi-messenger observation of GRB170817A, we discuss the expected neutrino production from this GRB and its dependence on the observation angle. We show that the neutrino flux for this event is at least four orders of magnitude below the detection limit for different geometries of the plasma jet.
Maier, Gernot [Verfasser]. „Suche nach Anisotropie in der kosmischen Strahlung mit dem KASCADE-Experiment / Forschungszentrum Karlsruhe GmbH, Karlsruhe. Gernot Maier“. Karlsruhe : FZKA, 2004. http://d-nb.info/971454574/34.
Der volle Inhalt der QuelleWeber, Jennifer H. [Verfasser]. „Untersuchung der elektromagnetischen und myonischen Komponente ausgedehnter Luftschauer und Bestimmung der Elementzusammensetzung der kosmischen Strahlung / Jennifer H. Weber“. Karlsruhe : KIT-Bibliothek, 1999. http://d-nb.info/1198222905/34.
Der volle Inhalt der QuelleMüller, Markus [Verfasser]. „Untersuchung unbegleiteter Hadronen der kosmischen Strahlung im Bereich bis zu einem PeV / Forschungszentrum Karlsruhe GmbH, Karlsruhe. Markus Müller“. Karlsruhe : FZKA, 2003. http://d-nb.info/970520778/34.
Der volle Inhalt der QuelleMerchel, Silke. „Über die Wechselwirkung der kosmischen Strahlung mit extraterrestrischer Materie radiochemische Bestimmung der Produktionsraten von kosmogenen langlebigen Radionukliden in Meteoriten /“. [S.l. : s.n.], 1998. http://deposit.ddb.de/cgi-bin/dokserv?idn=957445717.
Der volle Inhalt der QuelleUlrich, Holger [Verfasser]. „Untersuchungen zum primären Energiespektrum der kosmischen Strahlung im PeV-Bereich mit dem KASCADE-Experiment / Forschungszentrum Karlsruhe GmbH, Karlsruhe. Holger Ulrich“. Karlsruhe : FZKA, 2004. http://d-nb.info/971801290/34.
Der volle Inhalt der QuelleHausherr, Elena [Verfasser], und Olaf [Akademischer Betreuer] Rieß. „Prävention genotoxischer und karzinogener Effekte kosmischer Strahlung durch den Radioprotektor Ortho-Phospho-L-Tyrosin / Elena Elisabeth Hausherr ; Betreuer: Olaf Rieß“. Tübingen : Universitätsbibliothek Tübingen, 2015. http://d-nb.info/1197134883/34.
Der volle Inhalt der QuelleSimmer, Gregor Verfasser], Herwig G. [Akademischer Betreuer] [Paretzke und Walter [Akademischer Betreuer] Henning. „Messung sekundärer kosmischer Strahlung und Berechnung der zugehörigen Dosiskonversionskoeffizienten für den Menschen / Gregor Simmer. Gutachter: Walter Henning. Betreuer: Herwig G. Paretzke“. München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/102219576X/34.
Der volle Inhalt der QuelleZöllner, Hannes [Verfasser], Klaus [Akademischer Betreuer] Brieß, Klaus [Gutachter] Brieß und Burkart [Gutachter] Voß. „Erzeugung und Untersuchung von Effekten kosmischer Strahlung mit einem Klasse-1-Laseraufbau / Hannes Zöllner ; Gutachter: Klaus Brieß, Burkart Voß ; Betreuer: Klaus Brieß“. Berlin : Technische Universität Berlin, 2021. http://d-nb.info/1239177305/34.
Der volle Inhalt der QuelleFuhrmann, Daniel [Verfasser]. „KASCADE-Grande Measurements of Energy Spectra for Elemental Groups of Cosmic Rays = KASCADE-Grande-Messungen der Energiespektren einzelner Elementgruppen der kosmischen Strahlung / Daniel Fuhrmann“. Wuppertal : Universitätsbibliothek Wuppertal, 2012. http://d-nb.info/1022581872/34.
Der volle Inhalt der QuelleButler, David Alan [Verfasser], und R. [Akademischer Betreuer] Engel. „The Radio Signal of Cosmic Ray Air Showers and its Synthesis throughTemplates = Das Radiosignal von Luftschauern kosmischer Strahlung und dessen Synthese mittels Templates / David Alan Butler ; Betreuer: R. Engel“. Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/120664687X/34.
Der volle Inhalt der QuelleHammer, Gaël [Verfasser]. „Belastung des Flugpersonals durch kosmische Strahlung / vorgelegt von Gaël Hammer“. 2002. http://d-nb.info/964454971/34.
Der volle Inhalt der QuelleShalchi, Andreas [Verfasser]. „Transport kosmischer Strahlung in der anisotropen magnetohydrodynamischen Turbulenz / vorgelegt von Andreas Shalchi“. 2003. http://d-nb.info/96849014X/34.
Der volle Inhalt der QuelleBorrmann, Thorsten [Verfasser]. „Ein hydrodynamisches 3D-Mehrkomponentenmodell der Heliosphäre und ihrer Wechselwirkung mit kosmischer Strahlung / vorgelegt von Thorsten Borrmann“. 2005. http://d-nb.info/974923346/34.
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