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Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton-proton collisions at the LHC
(Peer reviewed; Journal article, 2017-05)This paper presents the method and performance of primary vertex reconstruction in proton--proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during ... -
Recreating the top quark: Commissioning and monitoring of the ATLAS Inner Detector and search for New Physics with heavy particles.
(Doctoral thesis, 2012-02-03)The ATLAS (A Toroidal Lhc ApparatuS) experiment is one of the two general purpose experiments at the Large Hadron Collider (LHC) at CERN, the European Organization for Nuclear Research. The LHC is a proton-proton and ion-ion ... -
Reducing systematic errors due to deformation of organs at risk in radiotherapy
(Journal article; Peer reviewed, 2021)Purpose In radiotherapy (RT), the planning CT (pCT) is commonly used to plan the full RT-course. Due to organ deformation and motion, the organ shapes seen at the pCT will not be identical to their shapes during RT. Any ... -
Reduction of noise in seismic hydrophone arrays modelling of breathing waves and adaptive noise cancelling
(NIFU-31, Doctoral thesis, 1993-04) -
Reduction of PTV margins for elective pelvic lymph nodes in online adaptive radiotherapy of prostate cancer patients
(Journal article; Peer reviewed, 2023)Background Cone beam CT (CBCT) based online adaptive radiotherapy (oART) is a new development in radiotherapy. With oART, the requirements for planning target volume (PTV) margins differ from standard therapy because ... -
The refractive and diffractive contributions to GPS signal scintillation at high latitudes during the geomagnetic storm on 7-8 September 2017
(Journal article; Peer reviewed, 2022)Different indices have been used to reflect, or monitor the ionospheric scintillation, e.g. the detrended carrier phase, σφ, S4, the rate of change of the vertical total electron content index (vROTI), as well as the ... -
Reinterpretation of LHC results for new physics: status and recommendations after run 2
(Journal article; Peer reviewed, 2020-08-21)We report on the status of efforts to improve the reinterpretation of searches and measurements at the LHC in terms of models for new physics, in the context of the LHC Reinterpretation Forum. We detail current experimental ... -
The Relationship Between Cusp Region Ion Outflows and East-West Magnetic Field Fluctuations at 4,000-km Altitude
(Journal article; Peer reviewed, 2020)A number of interdependent conditions and processes contribute to ionospheric-origin energetic ( ∼ 10 eV to several keV) ion outflows. Due to these interdependences and the associated observational challenges, energetic ... -
The relationship between interhemispheric asymmetries in polar ionospheric convection and the magnetic field line footpoint displacement field
(Journal article; Peer reviewed, 2022)Polar electrodynamics is largely controlled by solar wind and magnetospheric forcing. Different conditions can make plasma convection and magnetic field disturbances asymmetric between hemispheres. So far, these asymmetries ... -
The Relationship Between Large Scale Thermospheric Density Enhancements and the Spatial Distribution of Poynting Flux
(Journal article; Peer reviewed, 2021)Large thermospheric neutral density enhancements in the cusp region have been examined for many years. The Challenging Minisatellite Payload (CHAMP) satellite for example has enabled many observations of the perturbation, ... -
Relationship Between Microbial Growth and Hydraulic Properties at the Sub-Pore Scale
(Journal article; Peer reviewed, 2021)Accumulation of microbial biomass and its influence on porous media flow were investigated under saturated flow conditions. Microfluidic experiments were performed with model organisms, and their accumulation was observed ... -
Relative particle yield fluctuations in Pb--Pb collisions at √sNN=2.76 TeV
(Peer reviewed; Journal article, 2019)First results on K/π, p/π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN−−−√=2.76 TeV. The observable νdyn, which is defined in terms of ... -
Relativistic effects in photoionizing a circular Rydberg state in the optical regime
(Journal article; Peer reviewed, 2020)We study the photoionization process of a hydrogen atom initially prepared in a circular Rydberg state. The atom is exposed to a two-cycle laser pulse with a central wavelength of 800 nm. Before the atom approaches saturation, ... -
Resolution of the ATLAS muon spectrometer monitoreddrift tubes in LHC Run 2
(Peer reviewed; Journal article, 2019)The momentum measurement capability of the ATLAS muon spectrometer relies fundamentally on the intrinsic single-hit spatial resolution of the monitored drift tube precision tracking chambers. Optimal resolution is achieved ... -
Resonances in e+e- annihilation near 2.2 GeV
(Journal article; Peer reviewed, 2020-01-22)Using the initial-state radiation method, the e+e−→KSKL cross section from 1.98 to 2.54 GeV is measured in a data sample of 469 fb−1 collected with the BABAR detector. The results are used in conjunction with previous BABAR ... -
The response of permafrost and high latitude ecosystems under large scale stratospheric aerosol injection and its termination
(Peer reviewed; Journal article, 2019-04-15)Climate engineering arises as one of the potential methods that could contribute to meeting the 1.5oC global warming target agreed under the Paris Agreement. We examine how permafrost and high latitude vegetation respond ... -
Results from the EPICAL-2 ultra-high granularity electromagnetic calorimeter prototype
(Journal article; Peer reviewed, 2023)A prototype of a new type of calorimeter has been designed and constructed, based on a silicon–tungsten sampling design using pixel sensors with digital readout. It makes use of the ALPIDE sensor developed for the ALICE ... -
Results from the intercalibration of optical low light calibration sources 2011
(Peer reviewed; Journal article, 2012-05-03)Following the 38th Annual European Meeting on Atmospheric Studies by Optical Methods in Siuntio in Finland, an intercalibration workshop for optical low light calibration sources was held in Sodankylä, Finland. The main ... -
Results of the Electron Drift Instrument on Cluster
(Journal article; Peer reviewed, 2021)The electron drift instrument (EDI) on Cluster pioneered a new method of measuring electric fields, using a beam of electrons to sample the drift velocity over a km-scale gyro orbit. The technique is especially well suited ... -
Retrieval practice of a hierarchical principle structure in university introductory physics: Making stronger students
(Journal article; Peer reviewed, 2020)Introductory physics is taught to several hundred thousand university students every year. It is seen as especially difficult by many and the failure rate is often high. A relevant question is whether one can increase the ...