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Naslov: Space weather research with the Pierre Auger Observatory Avtorji: ID Stanič, Samo (Mentor) Več o mentorju... ID Živec, Miha (Avtor) ID Vorobiov, Serguei (Član komisije za zagovor) Datoteke: Miha_Zivec.pdf (5,21 MB) MD5: 3139BD5107A6E51DA220EF45026FDEA2   Jezik: Angleški jezik Vrsta gradiva: Magistrsko delo/naloga Tipologija: 2.09 - Magistrsko delo Organizacija: FN - Fakulteta za naravoslovje Opis: Space weather refers to environmental conditions in the interplanetary space and Earth’s magnetosphere, ionosphere and exosphere and can influence the performance and reliability of electronics based technological systems. The major role in space weather changes plays the solar wind, a stream of charged particles (mostly electrons and protons) with energies of approximately 1 keV, that can cause geomagnetic storms and auroras. During their entry into the atmosphere, high energy cosmic rays collide with atomic nuclei of atmospheric gasses. When scattering occurs extensive air showers are created. Those cascades of secondary particles create flashes of light due to the Cherenkov effect as well as excite molecules of nitrogen gas in atmosphere, which then glow in fluorescent light. In order to observe the light created by air showers, it has to be collected with telescopes. The particles from the cascades that reach ground can be detected with surface detectors. The Pierre Auger Observatory is the largest observatory for cosmic ray measurements. It is located in Argentinian pampas covering an area of 3000 km2. It consists of 1660 surface detectors and 27 fluorescence telescopes. For cosmic rays with energies above few 1017 eV, a precise reconstruction of energy and direction of primary particle is achievable. Observatory also allows measurement of flux of incoming particles down to primary energies in ca. 10 GeV - 10 TeV interval, with a median energy ca. 80-90 GeV. This measurement capability is called "scaler" mode, since the corresponding data consist of scaler counted cascade particles with deposited energy between 15 and 100 MeV, at the average rate of 2 kHz per individual surface detector. For the purpose of this master thesis I compared the data from scaler mode measurements with measurements of neutron monitors, which are commonly used for space weather observations. With the correlation received from the comparison, I showed that scaler mode operation of Pierre Auger observatory can be used to monitor space weather events such as solar cycle and the decreases in the observed galactic cosmic ray intensity due to solar wind (Forbush decrease). Ključne besede: Pierre Auger Observatory, cosmic rays, space weather, Forbush decrease Kraj izida: Nova Gorica Leto izida: 2019 PID: 20.500.12556/RUNG-4739-b15a2218-a753-0a59-945a-38d439820fce  COBISS.SI-ID: 5451515  NUK URN: URN:SI:UNG:REP:ISZ1KGBP Datum objave v RUNG: 17.09.2019 Število ogledov: 6658 Število prenosov: 200 Metapodatki:    Citiraj gradivo Navadno besedilo BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : ŽIVEC, Miha, 2019, Space weather research with the Pierre Auger Observatory [na spletu]. Magistrsko delo. Nova Gorica. [Dostopano 23 april 2025]. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=4739 Kopiraj citat

Skupna ocena: 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 (0 glasov) Vaša ocena: Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. Objavi na: Podobna dela iz repozitorija: Obtenção de peptídeos com capacidade inibitória da ação citotoxigênica das toxinas Stx de Escherichia colia partir de bibliotecas de phage display Heptapeptides as potential neutralizers for Shiga toxin 1 cytotoxicity Peptides derived from phage display libraries as potential neutralizers of Shiga toxin-induced cytotoxicity in vitro and in vivo Structural basis for the specific neutralization of Stx2a with a camelid single domain antibody fragment Non O157:H7 avian pathogenic Shiga toxin-producing Escherichia coli isolated from lesions on broiler chickens in Brazil Podobna dela iz ostalih repozitorijev: Purification of phage display-modified bacteriophage T4 by affinity chromatography Razvoj gensko spremenjenih mlečnokislinskih bakterij s sposobnostjo vezave toksina šiga Optimisation of peptide ligands of immunoglobulin G Fc region New methods for evaluation affinity of phage clones from phage display libraries Nanobodies as novel cancer therapeutics Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše podrobnosti ali sproži prenos.

Sekundarni jezik

Jezik:	Slovenski jezik
Naslov:	Raziskave vesoljskega vremena z observatorijem Pierre Auger
Opis:	Izraz vesoljsko vreme se uporablja za spremenljive pogoje v medplanetarnem prostoru v bližini Zemlje, ki vplivajo na Zemeljsko magnetosfero, ionosfero in eksosfero. Eden izmed glavnih vzrokov za vesoljsko vreme je sončev veter, tok nabitih delcev (elektronov in protonov) z energijami okoli 1 keV, ki lahko povzroca geomagnetne nevihte (perturbacije v Zemeljski magnetosferi) in polarni sij. Vpliva tudi na druge kozmicne delce z višjimi energijami, ki vpadajo v Zemeljsko atmosfero. Pri sipanju visokoenergijskih kozmicnih delcev na atomskih jedrih atmosferskih plinov pride do nastanka plazov sekundarnih delcev, ki jih je mogoce zaznati preko detekcije fluorescence ali pojava Cerenkova v atmosferi, bodisi z meritvami nabitih delcev, ki dosežejo površje. Najvecji observatorij na svetu za meritve lastnosti kozmicnih žarkov je observatorij Pierre Auger v Argentini, ki pokriva površino 3000 km2. Kot talne detektorje za meritve sekundarnih delcev, ki dosežejo površje, observatorij uporablja mrežo 1660 vodnih detektorjev cerenkova, hkrati pa uporablja tudi 27 fluorescencnih teleskopov za meritve lastnosti plazov v atmosferi. Smeri in energije kozmicnih delcev z energijami nad 1017 eV je mogoce rekonstruirati iz koincidence signalov iz vec talnih detektorjev. Observatorij omogoca tudi meritev fluksa primarnih kozmicnih delcev z nižjimi energijami (med 10 GeV in 10 TeV) v t. i. “scaler” nacinu, kjer neodvisno merimo število vpadlih kozmicnih delcev v vsakem posameznem talnem detektorju. Pri scaler nacinu so prešteti vsi iz kaskad, katerih energijska sled v detektorju, ni nižja od 15MeV in ne presega 100 MeV. Povprecna frekvenca sledi na detektor je približno 2 kHz. Podatke, pridobljene v scaler nacinu meritev sem primerjal s podatki, pridobljenimi z nevtronskimi opazovalnicami, ki se jih uporablja za opazovanje vesoljskega vremena. S korelacijo, dobljeno pri primerjavi, sem pokazal, da je z nizkoenergijskim nacinom delovanja observatorija Pierre Auger ravno tako mogoce spremljati dolgorocne spremembe vesoljskega vremena, kot je soncev cikel in zmanjšanje števila visokoenergijskih delcev, ki dosežejo Zemljo zaradi soncnih vetrov (Forbushev pojav).
Ključne besede:	observatorij Pierre Auger, kozmicni delci, vesoljsko vreme, Forbush decrease

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