Department of Physics and Technology: Nye registreringer

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    • Exploring Geospace Dynamics Through Ground Magnetic Perturbations during Substorms 

      Elhawary, Reham (Doctoral thesis, 2024-06-18)
      Dynamikken på dagsiden av ionosfæren styres hovedsakelig av samspillet mellom det interplanetære magnetfeltet (IMF) og jordens magnetfelt på dagsiden av magnetopausen, mens dynamikken på nattsiden hovedsakelig drives av ...

    • The Nature of High-Energy Tail Electron Precipitation 

      Salice, Josephine Alessandra (Doctoral thesis, 2024-06-14)
      Denne avhandlingen er en del av en større forskningsinnsats ved Universitetet i Bergen som prøver å forstå "Hva er effektene av partikkelnedbør på atmosfæren?". Ett viktig steg mot et svar er å forbedre parametriseringen ...

    • A spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurements 

      Mosland, Eivind Nag; Lunde, Per; Kocbach, Jan Martin (Journal article; Peer reviewed, 2023)
      In measurements and numerical modelling of wave propagation, undesired interference between direct and multipath arrivals can be reduced using Fourier-based signal processing methods. Existing methods, such as cepstral ...

    • Auroral Region Morphology and the Influence of Earth’s Rotation on Geospace Dynamics 

      Decotte, Margot (Doctoral thesis, 2024-06-07)
      Koblingen mellom solvinden, magnetosfæren, og ionosfæren er avgjørende for å forstå verdensrommet og dens påvirkning på Jorden. I de øvre lagene av atmosfæren ved polene, spesielt i området kjent som auroraregionen, møtes ...

    • Performance of the joint LST-1 and MAGIC observations evaluated with Crab Nebula data 

      Abe, H.; Abe, K.; Abe, S.; Acciari, V.A.; Aguasca-Cabot, A.; Agudo, I.; Alvarez Crespo, Crespo; Aniello, T.; Ansoldi, S.; Antonelli, L.A.; Aramo, C.; Arbet-Engels, A.; Arcaro, C.; Artero, M.; Asano, K.; Aubert, P.; Baack, D.; Babić, A.; Baktash, A.; Bamba, A.; Baquero Larriva, Larriva; Baroncelli, L.; Barres De Almeida, De; Barrio, J.A.; Batković, I.; Baxter, J.; Becerra González, Gonzalez; Bednarek, W.; Bernardini, E.; Bernardos, M.I.; Bernete Medrano, Medrano; Berti, A.; Besenrieder, J.; Bhattacharjee, P.; Biederbeck, N.; Bigongiari, C.; Biland, A.; Bissaldi, E.; Blanch, O.; Bonnoli, G.; Bordas, P.; Bošnjak, Z.; Bulgarelli, A.; Burelli, I.; Burmistrov, L.; Buscemi, M.; Busetto, G.; Campoy Ordaz, Ordaz; Cardillo, M.; Caroff, S.; Carosi, A.; Carosi, R.; Carrasco, M.S.; Carretero-Castrillo, M.; Cassol, F.; Castro-Tirado, A.J.; Cauz, D.; Cerasole, D.; Ceribella, G.; Chai, Y.; Cheng, K.; Chiavassa, A.; Chikawa, M.; Chytka, L.; Cifuentes, A.; Cikota, S.; Colombo, E.; Contreras, J.L.; Cornelia, A.; Cortina, J.; Costantini, H.; Covino, S.; D'Amico, Giacomo; D'Elia, V.; Da Vela, Vela; Dalchenko, M.; Dazzi, F.; De Angelis, Angelis; De Bony De Lavergne, Bony; De Lotto, Lotto; De Lucia, Lucia; De Menezes, Menezes; Del Peral, Peral; Del Popolo, Popolo; Deleglise, G.; Delfino, M.; Delgado Mendez, Mendez; Delgado Mengual, Mengual; Della Volpe, Volpe; Dellaiera, M.; Depaoli, D.; De Angelis, Angelis; Di Piano, Piano; Di Pierro, Pierro; Di Pilato, Pilato; Di Tria, Tria; Di Venere, Venere; Dominik, R.M.; Dominis Prester, Prester; Donini, A.; Dorner, D.; Doro, M.; Díaz, C.; Eisenberger, L.; Elsässer, D.; Emery, G.; Escudero, J.; Fallah Ramazani, Ramazani; Fariña, L.; Fattorini, A.; Ferrara, G.; Ferrarotto, F.; Fiasson, A.; Foffano, L.; Font, L.; Freixas Coromina, Coromina; Fröse, S.; Fukami, S.; Fukazawa, Y.; Garcia López, Lopez; Garcia, E.; Garczarczyk, M.; García López, Lopez; Gasbarra, C.; Gasparrini, D.; Gasparyan, S.; Gaug, M.; Geyer, D.; Giesbrecht Paiva, Paiva; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Grau, R.; Green, D.; Green, J.G.; Gunji, S.; Günther, P.; Hackfeld, J.; Hadasch, D.; Hahn, A.; Hashiyama, K.; Hassan, T.; Hayashi, K.; Heckmann, L.; Heller, M.; Herrera Llorente, Llorente; Hirotani, K.; Hoffmann, D.; Horns, D.; Houles, J.; Hrabovsky, M.; Hrupec, D.; Hui, D.; Hütten, M.; Iarlori, M.; Imazawa, R.; Inada, T.; Inome, Y.; Ioka, K.; Iori, M.; Iotov, R.; Ishio, K.; Jacquemont, M.; Jiménez Martínez, Martinez; Jobst, E.; Jormanainen, J.; Jurysek, J.; Kagaya, M.; Karas, V.; Katagiri, H.; Kataoka, J.; Kerszberg, D.; Kluge, Gert Werner; Kobayashi, Y.; Kohri, K.; Kong, A.; Kouch, P.M.; Kubo, H.; Kushida, J.; Lainez, M.; Lamanna, G.; Lamastra, A.; Le Flour, Flour; Leone, F.; Lindfors, E.; Linhoff, L.; Linhoff, M.; Lombardi, S.; Longo, F.; Loporchio, S.; Lorini, A.; Lozano Bahilo, Bahilo; Luque-Escamilla, P.L.; Lyard, E.; Láinez Lezáun, Lezaun; López-Coto, R.; López-Moya, M.; López-Oramas, A.; MacHado De Oliveira Fraga, De; Majumdar, P.; Makariev, M.; Mandat, D.; Maneva, G.; Manganaro, M.; Mangano, S.; Mang, N.; Manicò, G.; Mannheim, K.; Mariotti, M.; Marquez, P.; Marsella, G.; Martinez, O.; Martínez, G.; Martínez, M.; Martí, J.; Mas-Aguilar, A.; Maurin, G.; Mazin, D.; Menchiari, S.; Mender, S.; Mestre Guillen, Guillen; Micanovic, S.; Miceli, D.; Miener, T.; Miranda, J.M.; Mirzoyan, R.; Mizuno, T.; Mićanović, S.; Molero González, Gonzalez; Molina, E.; Mondal, H.A.; Montaruli, T.; Monteiro, I.; Moralejo, A.; Morcuende, D.; Morselli, A.; Moya, V.; Muraishi, H.; Murase, K.; Nagataki, S.; Nakamori, T.; Nanci, C.; Neronov, A.; Neustroev, V.; Nickel, L.; Nievas Rosillo, Rosillo; Nigro, C.; Nikolić, L.; Nilsson, K.; Nishijima, K.; Njoh Ekoume, Ekoume; Noda, K.; Nosek, D.; Nozaki, S.; Ohishi, M.; Ohtani, Y.; Oka, T.; Okumura, A.; Orito, R.; Otero-Santos, J.; Paiano, S.; Palatiello, M.; Paneque, D.; Pantaleo, F.R.; Paoletti, R.; Paredes, J.M.; Pavletić, L.; Pech, M.; Pecimotika, M.; Peresano, M.; Persic, M.; Pfeiffle, F.; Pietropaolo, E.; Pihet, M.; Pirola, G.; Plard, C.; Podobnik, F.; Poireau, V.; Polo, M.; Pons, E.; Prada Moroni, Moroni; Prandini, E.; Prast, J.; Principe, G.; Priyadarshi, C.; Prouza, M.; Rando, R.; Rhode, W.; Ribó, M.; Rico, J.; Righi, C.; Rizi, V.; Rodriguez Fernandez, Fernandez; Rodríguez Frías, Frias; Sahakyan, N.; Saito, T.; Sakurai, S.; Sanchez, D.A.; Satalecka, K.; Sato, M.; Sato, Y.; Saturni, F.G.; Savchenko, V.; Schleicher, B.; Schmidt, K.; Schmuckermaier, F.; Schubert, J.L.; Schussler, F.; Schweizer, T.; Sciaccaluga, A.; Siegert, T.; Silvia, R.; Sitarek, J.; Sliusar, V.; Sobczynska, D.; Spolon, A.; Stamerra, A.; Strišković, J.; Strom, D.; Strzys, M.; Suda, Y.; Suutarinen, S.; Šarić, T.; Tajima, H.; Takahashi, H.; Takahashi, M.; Takata, J.; Takeishi, R.; Tam, P.H.T.; Tanaka, S.J.; Tateishi, D.; Tavecchio, F.; Temnikov, P.; Terada, Y.; Terauchi, K.; Terzić, T.; Teshima, M.; Tluczykont, M.; Tokanai, F.; Torres, D.F.; Tosti, L.; Travnicek, P.; Truzzi, S.; Tutone, A.; Ubach, S.; Vacula, M.; Vallania, P.; Van Scherpenberg, Scherpenberg; Vazquez Acosta, Acosta; Ventura, S.; Verguilov, V.; Viale, I.; Vigliano, A.; Vigorito, C.F.; Visentin, E.; Vitale, V.; Voutsinas, G.; Vovk, I.; Vuillaume, T.; Vázquez Acosta, Acosta; Walter, R.; Wei, Z.; Will, M.; Yamamoto, T.; Yamazaki, R.; Yoshida, T.; Yoshikoshi, T.; Zywucka, N. (Journal article; Peer reviewed, 2023)
      Aims. Large-Sized Telescope 1 (LST-1), the prototype for the Large-Sized Telescope at the upcoming Cherenkov Telescope Array Observatory, is concluding its commissioning phase at the Observatorio del Roque de los Muchachos ...

    • An Updated Geomagnetic Index-Based Model for Determining the Latitudinal Extent of Energetic Electron Precipitation 

      Babu, Eldho Midhun; Nesse, Hilde; Hatch, Spencer Mark; Olsen, Nils; Salice, Josephine Alessandra; Richardson, Ian G. (Journal article; Peer reviewed, 2023)
      Energetic Electron Precipitation (EEP) from the Earth's plasma sheet and the radiation belts is an important feature of atmospheric dynamics through their destruction of ozone in the lower thermosphere and mesosphere. ...

    • Optical Insight Into Riverine Influences on Dissolved and Particulate Organic Carbon in a Coastal Arctic Lagoon System 

      Catipovic, L.; Longnecker, K.; Okkonen, S.R.; Koestner, Daniel Warren; Laney, S.R. (Journal article; Peer reviewed, 2023)
      Arctic coastal margins receive organic material input from rivers, melted sea ice, and coastal erosion, phenomena that are all undergoing changes related to global climate. The optical properties of coastal Arctic waters ...

    • One-dimensional spin-polarized surface states: A comparison of Bi(112) with other vicinal bismuth surfaces 

      Åsland, Anna Cecilie; Bakkelund, Johannes; Thingstad, Even; Røst, Håkon; Cooil, Simon Phillip; Hu, Jinbang; Vobornik, Ivana; Fujii, Jun; Sudbø, Asle; Wells, Justin William; Mazzola, Federico (Journal article; Peer reviewed, 2023)
      Vicinal surfaces of bismuth are unique test beds for investigating one-dimensional (1D) spin-polarized surface states that may one day be used in spintronic devices. In this paper, such states have been observed for the ...

    • Disentangling electron-boson interactions on the surface of a familiar ferromagnet 

      Røst, Håkon; Mazzola, Federico; Bakkelund, Johannes; Åsland, Anna Cecilie; Hu, Jinbang; Cooil, Simon Phillip; Polley, Craig; Wells, Justin William (Journal article; Peer reviewed, 2024)
      We report energy renormalizations from electron-phonon and electron-magnon interactions in spin minority surface resonances on Ni(111). The different interactions are identified, disentangled, and quantified from the ...

    • Different Types of Corona Discharges Associated With High-Altitude Positive Narrow Bipolar Events Nearby Cloud Top 

      Li, Dongshuai; Luque, Alejandro; Gordillo-Vazquez, F.J.; Pérez-Invernón, F.J.; Husbjerg, Lasse Skaaning; Neubert, Torsten; Chanrion, Olivier; Lu, Gaopeng; Zhang, Hongbo; Han, Jing; Lehtinen, Nikolai Grigorievich; Østgaard, Nikolai; Reglero, Víctor (Journal article; Peer reviewed, 2023)
      Single- and multi-pulse blue corona discharges are frequently observed in thunderstorm clouds. Although we know they often correlate with Narrow Bipolar Events (NBEs) in Very Low Frequency/Low Frequency radio signals, their ...

    • Measurements of the inherent optical properties of aqueous suspensions of microplastics 

      Koestner, Daniel Warren; Foster, Robert; El-Habashi, Ahmed; Cheatham, Shea Ann (Journal article; Peer reviewed, 2024)
      Libraries of inherent optical properties (IOPs) of microplastics are sparse, yet they are essential for the development of optical techniques to detect and quantify microplastics in the ocean. In this study, we describe ...

    • Multi-Instrument Observations of the Evolution of Polar Cap Patches Associated With Flow Shears and Particle Precipitation 

      Zhang, Duan; Zhang, Qing-He; Oksavik, Kjellmar; Xing, Zan-Yang; Lyons, L.R.; Yang, Hui-Gen; Li, Guo-Jun; Hosokawa, Keisuke; Shinbori, Atsuki; Ma, Yu-Zhang; Wang, Yong; Wang, Xiang-Yu (Journal article; Peer reviewed, 2023)
      Simultaneous observations from Defense Meteorological Satellite Program, Swarm, Resolute Bay all-sky imagers, GPS Total Electron Content and Super Dual Auroral Radar Network, are used to investigate the evolution and key ...

    • Method for retrieval of aerosol optical depth from multichannel irradiance measurements 

      Sztipanov, Milos; Li, Wei; Dahlback, Arne; Stamnes, Jakob J.; Svendby, Tove Marit; Stamnes, Knut (Journal article; Peer reviewed, 2023)
      We present, to the best of our knowledge, a new method for retrieval of aerosol optical depth from multichannel irradiance measurements. A radiative transfer model is used to simulate measurements to create the new aerosol ...

    • Three principal components describe the spatiotemporal development of mesoscale ionospheric equivalent currents around substorm onsets 

      Juusola, Liisa; Viljanen, Ari; Partamies, Noora; Vanhamäki, Heikki; Kellinsalmi, Mirjam; Walker, Simon (Journal article; Peer reviewed, 2023)
      Substorms are a commonly occurring but insufficiently understood form of dynamics in the coupled magnetosphere–ionosphere system, associated with space weather disturbances and auroras. We have used principal component ...

    • On the Creation, Depletion, and End of Life of Polar Cap Patches 

      Eriksen, Nina Kristine; Lorentzen, Dag Arne; Oksavik, Kjellmar; Baddeley, Lisa; Hosokawa, Keisuke; Shiokawa, Kazuo; Bland, Emma; Paxton, Larry; Zhang, Yongliang; McWilliams, Kathryn; Yeoman, Tim; Themens, David R. (Journal article; Peer reviewed, 2023)
      Ionospheric convection patterns from the Super Dual Auroral Radar Network are used to determine the trajectories, transit times, and decay rates of three polar cap patches from their creation in the dayside polar cap ...

    • A systematic approach for calibrating a Monte Carlo code to a treatment planning system for obtaining dose, LET, variable proton RBE and out-of-field dose 

      Tjelta, Johannes; Fjæra, Lars Fredrik; Ytre-Hauge, Kristian Smeland; Boer, Camilla Grindeland; Stokkevåg, Camilla Hanquist (Journal article; Peer reviewed, 2023)
      Objective. While integration of variable relative biological effectiveness (RBE) has not reached full clinical implementation, the importance of having the ability to recalculate proton treatment plans in a flexible, ...

    • On the Potential for Optical Detection of Microplastics in the Ocean 

      Koestner, Daniel Warren; Foster, Robert; El-Habashi, Ahmed (Journal article; Peer reviewed, 2023)

    • Height Determination of a Blue Discharge Observed by ASIM/MMIA on the International Space Station 

      Bai, Xue; Füllekrug, Martin; Chanrion, Olivier; Soula, Serge; Peverell, Adam; Mashao, Dakalo; Kosch, Michael; Husbjerg, Lasse; Østgaard, Nikolai; Neubert, Torsten; Reglero, Victor (Journal article; Peer reviewed, 2023)
      We analyze simultaneous photometric observations of thundercloud discharges from the Modular Multispectral Imaging Array of the Atmosphere-Space Interactions Monitor (ASIM) on board the International Space Station with ...

    • Observational and Model Impact of Tonga Volcano Eruption on Schumann Resonance 

      Mezentsev, Andrey; Nickolaenko, A.P.; Shvets, A.V.; Galuk, Yu. P.; Schekotov, A. Yu.; Hayakawa, M.; Romero, R.; Izutsu, J.; Kudintseva, I.G. (Journal article; Peer reviewed, 2023)
      Tonga volcano eruption on 15 January 2022 was accompanied by an unprecedentedly high lightning activity in the volcano plume which significantly exceeded the lightning activity level of the whole globe. We compare model ...

    • Improved multivariable algorithms for estimating oceanic particulate organic carbon concentration from optical backscattering and chlorophyll-a measurements 

      Koestner, Daniel; Stramski, Dariusz; Reynolds, Rick A. (Journal article; Peer reviewed, 2024-01-08)
      The capability to estimate the oceanic particulate organic carbon concentration (POC) from optical measurements is crucial for assessing the dynamics of this carbon reservoir and the capacity of the biological pump to ...