Viser treff 41-60 av 1453

• #### 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 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 ...
• #### Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in p-Pb Collisions at √sNN=5.02  TeV ﻿

(Peer reviewed; Journal article, 2019)
Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity ( | η | < 0.8 ) are measured in p -Pb collisions at √ s N N = 5.02     TeV . The analysis is carried out for the 0%–20% (high) ...
• #### Azimuthally differential pion femtoscopy in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV ﻿

(Peer reviewed; Journal article, 2017-06)
We present the first azimuthally differential measurements of the pion source size relative to the second harmonic event plane in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of \(\sqrt{s_{\rm ...
• #### Azimuthally differential pion femtoscopy relative to the second and thrid harmonic in Pb-Pb 2.76 TeV collisions from ALICE ﻿

(Peer reviewed; Journal article, 2017-11)
Azimuthally differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze-out, provide very important information on the ...
• #### Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb–Pb collisions at √sNN = 2.76 TeV ﻿

(Peer reviewed; Journal article, 2018-06-22)
Azimuthally-differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze out, provide very important information on the ...
• #### The BABAR detector: Upgrades, operation and performance ﻿

(Peer reviewed; Journal article, 2013-11-21)
The BaBar detector operated successfully at the PEP-II asymmetric e+e− collider at the SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of the collider and the ...