Dr. Anna Nelles erforscht ultra-hochenergetische kosmische Strahlung und deren Neutrinoquellen durch großskalige Radiodetektoren im Antarktischen Eis. Sie arbeitet an der Detektion und Analyse von Neutrinosignalen, um die noch ungeklärten Ursprünge der energiereichsten kosmischen Teilchen zu identifizieren. Die Forschung trägt zum Verständnis fundamentaler astrophysikalischer Prozesse bei und erfordert internationale Kooperationen sowie spezialisierte Detektortechnologie in extremen Umgebungen.
🔒 Das System hat 807 mögliche Industrie-Partner gefunden — Firmen, Scores und Begründungen sind nur für eingeloggte Nutzer:innen sichtbar. Anmelden
Dr. Anna Nelles
HU-FIS-Profil ↗Allen wissenschaftlichen Bemühungen zum Trotz sind die Quellen ultra-hochenergetischer kosmischer Strahlung (UHECRs, ultra-high energy cosmic rays) noch immer ein Rätsel. Das hängt vor allem mit den komplizierten Wechselwirkungen geladener kosmischer Strahlung und dem Zusammenspiel mit (inter)galaktischen Magnetfeldern zusammen. Neutrinos, die durch Wechselwirkung mit der kosmischen Strahlung entstehen, enthalten essentielle Informationen über ihre Quellen. Zudem erreichen sie die Erde nahezu unbeeinflusst. Die Messung des Flusses dieser Neutrinos verspricht daher grundsätzlich klärende Aussagen über die Quellen der kosmischen Strahlung. Die Messung setzt einen Detektor für Neutrinosignale oberhalb einer Energie von 10^16 eV voraus. Die Empfindlichkeit bisheriger Detektoren reicht dafür allerdings angesichts des geringen Flusses der Neutrinos nicht aus und lässt sich mit der bisherigen Technologie auch nicht hinreichend steigern, jedenfalls nicht zu finanzierbaren Bedingungen. Eine vielversprechende Alternative ist die Radiodetektion, die es erlaubt bei einer Volumensteigerung von zwei Größenordnungen signifikant empfindlicher zu werden und gleichzeitig zu ähnlichen Kosten technologisch realisierbar zu sein. Die Eignung dieser Methode hat sich in Pilotprojekten bereits erwiesen; für die Entwicklung eines effizienten Detektors sind jedoch weitere Studien erforderlich.
Progress of Theoretical and Experimental Physics · DOI
Abstract The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app.
Physical review. D/Physical review. D. · DOI
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Most of the 120 reviews are updated, including many that are heavily revised. The is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings. The complete (both volumes) is published online on the website of the Particle Data Group () and in a journal. Volume 1 is available in print as the . A with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app. The 2024 edition of the Review of Particle Physics should be cited as: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024) © 2024 2024
Astronomy and Astrophysics · DOI
LOFAR, the LOw-Frequency ARray, is a new-generation radio interferometer constructed in the north of the Netherlands and across europe. Utilizing a novel phased-array design, LOFAR covers the largely unexplored low-frequency range from 10–240 MHz and provides a number of unique observing capabilities. Spreading out from a core located near the village of Exloo in the northeast of the Netherlands, a total of 40 LOFAR stations are nearing completion. A further five stations have been deployed throughout Germany, and one station has been built in each of France, Sweden, and the UK. Digital beam-forming techniques make the LOFAR system agile and allow for rapid repointing of the telescope as well as the potential for multiple simultaneous observations. With its dense core array and long interferometric baselines, LOFAR achieves unparalleled sensitivity and angular resolution in the low-frequency radio regime. The LOFAR facilities are jointly operated by the International LOFAR Telescope (ILT) foundation, as an observatory open to the global astronomical community. LOFAR is one of the first radio observatories to feature automated processing pipelines to deliver fully calibrated science products to its user community. LOFAR’s new capabilities, techniques and modus operandi make it an important pathfinder for the Square Kilometre Array (SKA). We give an overview of the LOFAR instrument, its major hardware and software components, and the core science objectives that have driven its design. In addition, we present a selection of new results from the commissioning phase of this new radio observatory.