Blar i Department of Physics and Technology på tittel
Viser treff 1351-1370 av 2132
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On the design of Neutral Scanning Helium Atom Microscopes (SHeM) : Optimal configurations and evaluation of experimental findings
(Doctoral thesis, 2021-11-09)Scanning Helium Microscopes (SHeMs) are novel microscopy tools using neutral helium atoms as the imaging probe. Helium atoms have several advantages compared to other probes such as electrons or helium ions. Helium atoms ... -
On the High‐Energy Spectral Component and Fine Time Structure of Terrestrial Gamma Ray Flashes
(Journal article; Peer reviewed, 2019)Terrestrial gamma ray flashes (TGFs) are very short bursts of gamma radiation associated to thunderstorm activity and are the manifestation of the highest‐energy natural particle acceleration phenomena occurring on Earth. ... -
On the Impact of a Streaming Oxygen Population on Collisionless Magnetic Reconnection
(Journal article; Peer reviewed, 2020)Using 2.5-D Particle-In-Cell (PIC) simulations, we investigate how magnetotail reconnection is affected by a cold, streaming, oxygen plasma population, attributed to an ionospheric source, in the inflow region. As the ... -
On the Persistent Shape and Coherence of Pulsating Auroral Patches
(Peer reviewed; Journal article, 2018-05)The pulsating aurora covers a broad range of fluctuating shapes that are poorly characterized. The purpose of this paper is therefore to provide objective and quantitative measures of the extent to which pulsating auroral ... -
On the Potential for Optical Detection of Microplastics in the Ocean
(Journal article; Peer reviewed, 2023) -
On the Presence and Thermalization of Cold Ions in the Exhaust of Antiparallel Symmetric Reconnection
(Journal article; Peer reviewed, 2021)Using fully kinetic 2.5 dimensional particle-in-cell simulations of anti-parallel symmetric magnetic reconnection, we investigate how initially cold ions are captured by the reconnection process, and how they evolve and ... -
On the Production of Ionospheric Irregularities Via Kelvin-Helmholtz Instability Associated with Cusp Flow Channels
(Journal article; Peer reviewed, 2020)We present a multi‐instrument multiscale study of a channel of enhanced, inhomogeneous flow in the cusp ionosphere occurring on November 30, 2014. We provide evidence that strong Global Navigation Satellite System (GNSS) ... -
On the timing between terrestrial gamma ray flashes, radio atmospherics, and optical lightning emission
(Peer reviewed; Journal article, 2017)On 25 October 2012 the Reuven Ramaty High Energy Solar Spectroscope Imager (RHESSI) and the Tropical Rainfall Measuring Mission (TRMM) satellites passed over a thunderstorm on the coast of Sri Lanka. RHESSI observed a ... -
On-line dose-guidance to account for inter-fractional motion during proton therapy
(Peer reviewed; Journal article, 2019-01)Background and purpose Proton therapy (PT) of extra-cranial tumour sites is challenged by density changes caused by inter-fractional organ motion. In this study we investigate on-line dose-guided PT (DGPT) to account ... -
On-line X-ray fluorescence analysis applied to industrial processes and environmental monitoring
(Master thesis, 2000)Abstract X-ray stimulated fluorescence analysis is a powerful and widely used tool for determining the concentration of chemical species in materials. Presently, this is done by taking and preparing samples for off-line ... -
One-dimensional charged kaon femtoscopy in p-Pb collisions at √sNN = 5.02 TeV
(Peer reviewed; Journal article, 2019)The correlations of identical charged kaons were measured in p-Pb collisions at √sNN = 5.02 TeV by the ALICE experiment at the LHC. The femtoscopic invariant radii and correlation strengths were extracted from one-dimensional ... -
One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at \(\sqrt{s_{\rm {NN}}}\) =2.76 TeV
(Peer reviewed; Journal article, 2015-11)The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb ... -
One-dimensional spin-polarized surface states: A comparison of Bi(112) with other vicinal bismuth surfaces
(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 ... -
Online data compression in the ALICE O\(^2\) facility
(Peer reviewed; Journal article, 2017)The ALICE Collaboration and the ALICE O2 project have carried out detailed studies for a new online computing facility planned to be deployed for Run 3 of the Large Hadron Collider (LHC) at CERN. Some of the main aspects ... -
Onset of smoldering and transition to flaming fire
(Doctoral thesis, 2013-06-28)Aim: The aim of this work has been to investigate the effects of density, heat flux and boundary conditions on smoldering. Two focus areas were chosen: the onset of smoldering and the transition from smoldering to flaming ... -
Onset of Spontaneous Imbibition
(Master thesis, 2017-06-22)The spontaneous imbibition process in porous media is an important recovery mechanism and is governed by capillary forces that arise when two immiscible fluids are present in the pore space. This thesis presents new ... -
Open heavy-flavour production and elliptic flow in p-Pb collisions at the LHC with ALICE
(Peer reviewed; Journal article, 2019)Measurements of open heavy flavour production in p–A collisions allow the investigation of Cold Nuclear Matter effects. In addition, they are an important tool for a complementary investigation of the long-range correlations ... -
Operation and performance of the ATLAS Tile Calorimeter in Run 1
(Peer reviewed; Journal article, 2018-11-30)The Tile Calorimeter is the hadron calorimeter covering the central region of the ATLAS experiment at the Large Hadron Collider. Approximately 10,000 photomultipliers collect light from scintillating tiles acting as the ... -
Optical emissions associated with narrow bipolar events from thunderstorm clouds penetrating into the stratosphere
(Journal article; Peer reviewed, 2021)Narrow bipolar events (NBEs) are signatures in radio signals from thunderstorms observed by ground-based receivers. NBEs may occur at the onset of lightning, but the discharge process is not well understood. Here, we present ... -
Optical Insight Into Riverine Influences on Dissolved and Particulate Organic Carbon in a Coastal Arctic Lagoon System
(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 ...