Now showing items 39-58 of 1540

• #### (Anti-)deuteron production in pp collisions at √s=13TeV ﻿

(Journal article; Peer reviewed, 2020)
The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of ...
• #### Antiproton tagging and vertex fitting in a Timepix3 detector ﻿

(Peer reviewed; Journal article, 2018-06-07)
Studies of antimatter are important for understanding our universe at a fundamental level. There are still unsolved problems, such as the matter-antimatter asymmetry in the universe. The AEgIS experiment at CERN aims at ...
• #### Application of MRI in studies of tetrahydrofuran hydrates in quartz sand at atmospheric pressure ﻿

(Master thesis, 2017-12-06)
Natural gas hydrates form under low temperatures and high pressures. They can be found in abundance in permafrost environments and under the sea floor, where the temperature and pressure conditions ensure their stability. ...
• #### Are EEP Events Important for the Tertiary Ozone Maximum? ﻿

(Peer reviewed; Journal article, 2019)
Energetic particle precipitation (EPP) increases the production of odd hydrogen (HOX ) species in the mesosphere, which catalytically destroy ozone (O3) in sunlight. Hence, the EPP‐HOX impact on the tertiary O3 maximum ...
• #### The ASIM mission on the international space station ﻿

(Peer reviewed; Journal article, 2019-03-12)
The Atmosphere-Space Interactions Monitor (ASIM) is an instrument suite on the International Space Station (ISS) for measurements of lightning, Transient Luminous Events (TLEs) and Terrestrial Gamma-ray Flashes (TGFs). ...
• #### Aspects of Electron Dynamics in Atoms Exposed to Single Cycle Electromagnetic Pulses ﻿

(Doctoral thesis, 2018-06-29)
This thesis covers the topic in atomic physics: Interaction of a strong external field with Rydberg hydrogen atom. In three scientific publications, we have targeted physical processes such as the field ionization in the ...
• #### Assessing North Atlantic winter climate response to geomagnetic activity and solar irradiance variability ﻿

(Peer reviewed; Journal article, 2019)
Recent studies suggest a response in the North Atlantic winter circulation which lags by a couple of years with respect to sunspot maximum. This has been explained by two different top‐down mechanisms: a solar wind driven ...
• #### The asymmetric geospace as displayed during the geomagnetic storm on 17 August 2001 ﻿

(Peer reviewed; Journal article, 2018-11-29)
Previous studies have shown that conjugate auroral features are displaced in the two hemispheres when the interplanetary magnetic field (IMF) has a transverse (Y) component. It has also been shown that a BY component is ...
• #### Asymmetric Ionospheric Equivalent Currents at Magnetic Conjugate Points ﻿

(Master thesis, 2017-07-01)
In this thesis we will study high-latitude ionospheric equivalent currents at magnetic conjugate points. The following questions have been addressed in this thesis: What solar zenith angle defines the dark-sunlit terminator? ...
• #### ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV ﻿

(Peer reviewed; Journal article, 2019)
The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency ...
• #### ATLAS data quality operations and performance for 2015–2018 data-taking ﻿

(Journal article; Peer reviewed, 2020-04)
The ATLAS detector at the Large Hadron Collider reads out particle collision data from over 100 million electronic channels at a rate of approximately 100 kHz, with a recording rate for physics events of approximately 1 ...
• #### ATLAS Detector Monitoring with Jets ﻿

(Master thesis, 2009-10-02)
The purpose of this thesis was to provide a high level software framework for detecting large problems with the ATLAS detector at the LHC and estimate the jet resolution from the f irst data. The result was the program ...
• #### ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at $\sqrt{s}$=7 TeV ﻿

(Peer reviewed; Journal article, 2013-01)
Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy $\sqrt{s}$=7 TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated ...
• #### Atmospheric Drag, Occultation 'N' Ionospheric Scintillation (ADONIS) mission proposal: Alpbach Summer School 2013 team orange ﻿

(Peer reviewed; Journal article, 2015)
The Atmospheric Drag, Occultation ‘N’ Ionospheric Scintillation mission (ADONIS) studies the dynamics of the terrestrial thermosphere and ionosphere in dependency of solar events over a full solar cycle in Low Earth Orbit ...
• #### Atomic resolution imaging of beryl: an investigation of the nano-channel occupation ﻿

(Peer reviewed; Journal article, 2016)
Beryl in different varieties (emerald, aquamarine, heliodor etc.) displays a wide range of colours that have fascinated humans throughout history. Beryl is a hexagonal cyclo-silicate (ring-silicate) with channels going ...
• #### Auroral imaging as a tracer of global magnetospheric dynamics ﻿

(Doctoral thesis, 2010-11-12)
• #### Automated XY-table for the characterisation of arrays of pixel sensors for photons and charge particles ﻿

(Master thesis, 2010-06-01)
A variety of arrays of pixels sensors (pixel = picture elements) have been developed during the last 30 years for the detection of photons and charge particles. Pixel based semiconductor detectors are not only used for ...
• #### Autonomic Operation of a Large High Performance On-Line Compute Cluster ﻿

(Doctoral thesis, 2015-12-10)
A High-Level Trigger (HLT) system is composed of both hardware and software. Designing the physical layout of the cluster mainly concerns the hardware; node distribution, network layout, estimation of power requirements, ...
• #### Azimuthal anisotropy of charged jet production in $\sqrt{s_{\rm NN}}=2.76$ TeV Pb–Pb collisions ﻿

(Peer reviewed; Journal article, 2016-02)
This paper presents measurements of the azimuthal dependence of charged jet production in central and semi-central $\sqrt{s_{\rm NN}}=2.76$ TeV Pb–Pb collisions with respect to the second harmonic event plane, quantified ...
• #### Azimuthal anisotropy of D-meson production in Pb-Pb collisions at √sNN =2.76 TeV ﻿

(Peer reviewed; Journal article, 2014-09)
The production of the prompt charmed mesons D0, D+, and D*+ relative to the reaction plane was measured in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision of √sNN=2.76TeV with the ALICE detector ...