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Simultaneous Excitation of Helium by Means of an Electron and a Photon: A Joined Experimental and Theoretical Study
(Journal article; Peer reviewed, 2021)We report on a joined experimental and theoretical study of differential cross-sections resulting from inelastic scattering of a monoenergetic electron by helium atoms in the presence of an intense carbon dioxide laser. ... -
A Simultaneous Observation of Lightning by ASIM, Colombia-Lightning Mapping Array, GLM, and ISS-LIS
(Journal article; Peer reviewed, 2021)The Atmosphere-Space Interactions Monitor (ASIM) on the International Space Station (ISS) provides optical radiances and images of lightning flashes in several spectral bands. This work presents a lightning flash simultaneously ... -
Simultaneous Observations of EIP, TGF, Elve, and Optical Lightning
(Journal article; Peer reviewed, 2021)On February 8, 2019, the Atmosphere-Space Interaction Monitor observed a terrestrial gamma-ray flash (TGF) and an Elve from a positive intracloud (+IC) lightning during the initial breakdown stage of a lightning flash north ... -
Simultaneous observations of traveling convection vortices: Ionosphere-thermosphere coupling
(Peer reviewed; Journal article, 2017-05)We present simultaneous observations of magnetosphere-ionosphere-thermosphere coupling over Svalbard during a traveling convection vortex (TCV) event. Various spaceborne and ground-based instruments made coordinated ... -
Simultaneous rocket and scintillation observations of plasma irregularities associated with a reversed flow event in the cusp ionosphere
(Peer reviewed; Journal article, 2019-08-02)We present an overview of the ionospheric conditions during the launch of the Investigation of Cusp Irregularities 3 (ICI‐3) sounding rocket. ICI‐3 was launched from Ny‐Ålesund, Svalbard, at 7:21.31 UT on 3 December 2011. ... -
Single Event Upsets in SRAM FPGA based readout electronics for the Time Projection Chamber in the ALICE experiment
(Doctoral thesis, 2009-12-11)Single Event Upsets in SRAM FPGA based readout electronics for the Time Projection Chamber in the ALICE experiment irradiation test results have been used to predict the single event upset rate expected during operation ... -
Single-Cell Tests to Explore the Reliability of Sofc Installations Operating Offshore
(Journal article; Peer reviewed, 2020)This paper studies the robustness of off-shore solid oxide fuel cell (SOFC) installations and the nature and causes of possible cell degradation in marine environments. Two important, cathode-related, impediments to ensuring ... -
Skaleringskriterier for vannflømming i sandstein og tertiær oljeutvinning ved bruk av CO2
(Master thesis, 2011-06-14)I forbindelse med studier for økt oljeproduksjon utføres kjerneanalyse på kjerneprøver som representerer en liten fraksjon av oljereservoarer. I korte kjerneprøver vil de kapillære endeeffektene påvirke flømmingene, noe ... -
Small Scale Hydrocarbon Fire Test Concept
(Peer reviewed; Journal article, 2017-11-14)In the oil and gas industry, hydrocarbon process equipment was previously often thermally insulated by applying insulation directly to the metal surface. Fire protective insulation was applied outside the thermal insulation. ... -
Small-Scale Crisis in Cosmology – Sterile Neutrinos to the Rescue?
(Peer reviewed; Journal article, 2019-04-24)The ΛCDM standard model of cosmology is in excellent agreement with data on large scales but has difficulty explaining all observations on small scales. I discuss a simple particle physics model involving a new MeV-scale ... -
Soft-Dielectron Excess in Proton-Proton Collisions at s =13 TeV
(Journal article; Peer reviewed, 2021)A measurement of dielectron production in proton-proton (pp) collisions at √s=13 TeV, recorded with the ALICE detector at the CERN LHC, is presented in this Letter. The data set was recorded with a reduced magnetic solenoid ... -
Softly broken symmetries in the 2HDM — an invariant formulation
(Journal article; Peer reviewed, 2023)Soft breaking of a symmetry requires an invariance of the dimension-4 part of the Lagrangian and non-trivial variation of the lower-dimensional part. However, in general, separation between the dim-4 and lower-dimensional ... -
Solar cells of Cu2ZnSnS4 thin films prepared by chemical bath deposition method
(Peer reviewed; Journal article, 2014)Solar cells based on kesterite-type Cu2ZnSnS4 have been successfully fabricated on ITO substrates by cost effective chemical bath deposition method. The structural properties of the material have been studied using X-ray ... -
Solar Cycle and Solar Wind Dependence of the Occurrence of Large dB/dt Events at High Latitudes
(Journal article; Peer reviewed, 2023)We investigate sharp changes in magnetic field that can produce Geomagnetically Induced Currents (GICs) which damage pipelines and power grids. We use one-minute cadence SuperMAG observations to find the occurrence ... -
Solar illumination control of ionospheric outflow above polar cap arcs
(Peer reviewed; Journal article, 2015-03-12)We measure the flux density, composition, and energy of outflowing ions above the polar cap, accelerated by quasi-static electric fields parallel to the magnetic field and associated with polar cap arcs, using Cluster. ... -
Solar illumination dependence of the auroral electrojet intensity: Interplay between the solar zenith angle and dipole tilt
(Peer reviewed; Journal article, 2019-08)The present study investigates the dependence of the local auroral electrojet (AEJ) intensity on solar illumination by statistically examining northward geomagnetic disturbances in the auroral zone in terms of the solar ... -
Solar radiation energy on the Tibetan plateau
(Master thesis, 2015-11-20)To gain a thorough knowledge of the solar energy resources on the Tibetan Plateau, measured and modeled solar irradiance levels on the Plateau from July 2010 to September 2013 are considered. The Tibetan Plateau lies in ... -
Solar Wind and Seasonal Influence on Ionospheric Currents From Swarm and CHAMP Measurements
(Peer reviewed; Journal article, 2018-05-29)We present a new climatological model of the ionospheric current system, determined from magnetic measurements taken by the Challenging Minisatellite Payload (CHAMP) and Swarm satellites. The model describes the horizontal ... -
Solar Wind—Magnetosphere Coupling During Radial Interplanetary Magnetic Field Conditions: Simultaneous Multi-Point Observations
(Journal article; Peer reviewed, 2021)In-situ spacecraft missions are powerful assets to study processes that occur in space plasmas. One of their main limitations, however, is extrapolating such local measurements to the global scales of the system. To overcome ... -
Solubilisering av 1 - pentanol og 1 - heksanol i natriumkolat og i en blanding av natriumkolat og natrium dodecylsulfat
(Master thesis, 2014-06-01)Micelledannelse og alkoholsolubilisering i vandig løsning NaC, natriumkolat, og ekvimolal blanding av NaC og NaDS, natrium dodecylsulfat, er undersøkt ved tetthets - og lydhastighetsmålinger ved 25 oC og atmosfæretrykk. ...