### Recent Submissions

• #### Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events ﻿

(Copernicus PublicationsEuropean Geosciences Union, 2015-05-04)
This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere–lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain ...
• #### The effect of fluid viscosity and geometry on hydrocyclone performance ﻿

(The University of Bergen, 2015-02-02)
Hydrocyclones have been widely used throughout industries for separating sand particles of various sizes and shape from fluids. Producing petroleum resources includes amounts of water, which contain different amounts of ...
• #### Current systems associated with Non-Conjugate Aurora ﻿

(The University of Bergen, 2015-01-20)
The main goal of this Thesis is twofold. First, we want to develop a solid method for identifying the field aligned currents related to the specific non-conjugate auroral features identified by Reistad et al. [2013] and ...
• #### Developing calibrated ultrasound equipment for sonoporation research ﻿

(The University of Bergen, 2015-03-29)
Sonoporation is the transient formation of pores in cells, due to the application of ultrasound or ultrasound in combination with microbubbles. This increases drug uptake. Nevertheless, the ideal parameters for sonoporation ...
• #### Design, implementation and testing of SRAM based neutron detectors ﻿

(The University of Bergen, 2011-06-01)
Neutrons of thermal and high energies can change the value of a bit stored in a Static Random Access Memory (SRAM) memory chip. The effect is non destructive and linearly dependent on the amount of incoming particles, which ...
• #### Measurements of four-lepton production at the Z resonance in pp collisions at √s = 7 and 8 TeV with ATLAS ﻿

(American Physical Society, 2014-06-13)
Measurements of four-lepton (4ℓ, ℓ=e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions mℓ+ℓ−>5  GeV and ...
• #### Exclusive J /ψ photoproduction off protons in ultraperipheral p-Pb collisions at √sNN = 5.02TeV ﻿

(American Physical Society, 2014-12-05)
We present the first measurement at the LHC of exclusive J/ψ photoproduction off protons, in ultraperipheral proton-lead collisions at √sNN=5.02  TeV. Events are selected with a dimuon pair produced either in the rapidity ...
• #### Evidence for electroweak production of W±W±jj in pp collisions at √s =8 TeV with the ATLAS detector ﻿

(American Physical Society, 2014-10-03)
This Letter presents the first study of W±W±jj, same-electric-charge diboson production in association with two jets, using 20.3  fb−1 of proton-proton collision data at s√=8  TeV recorded by the ATLAS detector at the Large ...
• #### Study of heavy-flavor quarks produced in association with top-quark pairs at √s =7 TeV using the ATLAS detector ﻿

(American Physical Society, 2014-04-21)
Using a sample of dilepton top-quark pair (tt¯) candidate events, a study is performed of the production of top-quark pairs together with heavy-flavor (HF) quarks, the sum of tt¯+b+X and tt¯+c+X, collectively referred to ...
• #### Search for dark matter in events with a hadronically decaying W or Z boson and missing transverse momentum in pp collisions at √s = 8 TeV with the ATLAS detector ﻿

(American Physical Society, 2014-01-29)
A search is presented for dark matter pair production in association with a W or Z boson in pp collisions representing 20.3  fb−1 of integrated luminosity at s√=8  TeV using data recorded with the ATLAS detector at the ...
• #### A moiré deflectometer for antimatter ﻿

(Nature Publishing Group, 2014-07-28)
The precise measurement of forces is one way to obtain deep insight into the fundamental interactions present in nature. In the context of neutral antimatter, the gravitational interaction is of high interest, potentially ...
• #### Search for scalar diphoton resonances in the mass range 65-600 GeV with the ATLAS detector in pp collision data at √s = 8  TeV ﻿

(American Physical Society, 2014-10-20)
A search for scalar particles decaying via narrow resonances into two photons in the mass range 65–600 GeV is performed using 20.3  fb⎻¹ of s√=8  TeV pp collision data collected with the ATLAS detector at the Large Hadron ...
• #### Search for quantum black hole production in high-invariant-mass lepton + jet final states using pp collisions at √s = 8 TeV and the ATLAS detector ﻿

(American Physical Society, 2014-03-05)
This Letter presents a search for quantum black-hole production using 20.3  fb⎻¹ of data collected with the ATLAS detector in pp collisions at the LHC at √s=8  TeV. The quantum black holes are assumed to decay into a final ...
• #### Multiparticle azimuthal correlations in p -Pb and Pb-Pb collisions at the CERN Large Hadron Collider ﻿

(American Physical Society, 2014-11-03)
Measurements of multiparticle azimuthal correlations (cumulants) for charged particles in p-Pb at √sNN=5.02 TeV and Pb-Pb at √sNN=2.76 TeV collisions are presented. They help address the question of whether there is evidence ...
• #### Search for the lepton flavor violating decay Z →eμ in pp collisions at √s=8TeV with the ATLAS detector ﻿

(American Physical Society, 2014-10-23)
The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process Z→eμ in pp collisions using 20.3  fb⎻¹ of data collected at √s=8  TeV. An enhancement in the eμ invariant mass ...
• #### Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at √s = 8TeV with the ATLAS detector ﻿

(American Physical Society, 2014-07-10)
A search is presented for production of dark-matter particles recoiling against a leptonically decaying Z boson in 20.3  fb⎻¹ of pp collisions at s√=8  TeV with the ATLAS detector at the Large Hadron Collider. Events with ...
• #### Monte Carlo simulations of a scanning system based on a panoramic X-ray tube with a conical anode ﻿

(Hindawi, 2014-08-21)
Monte Carlo simulations were used to study photon production in a panoramic X-ray tube with a conical tungsten target to determine the optimal characteristics of the target shape and electron beam configuration. Several ...
• #### Two- and three-pion quantum statistics correlations in Pb-Pb collisions at √sNN = 2.76 TeV at the CERN Large Hadron Collider ﻿

(American Physical Society, 2014-02-26)
Correlations induced by quantum statistics are sensitive to the spatiotemporal extent as well as dynamics of particle-emitting sources in heavy-ion collisions. In addition, such correlations can be used to search for the ...
• #### Measurement of the parity-violating asymmetry parameter αb and the helicity amplitudes for the decay Λb0 →J /ψ Λ0 with the ATLAS detector ﻿

(American Physical Society, 2014-05-27)
A measurement of the parity-violating decay asymmetry parameter, αb, and the helicity amplitudes for the decay Λ0b→J/ψ(μ+μ−)Λ0(pπ−) is reported. The analysis is based on 1400 Λ0b and Λ¯0b baryons selected in 4.6  fb−1 of ...
• #### The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events ﻿

(Elsevier, 2010-10-01)
The design, construction, and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It is the main device for pattern recognition, tracking, and identification of charged particles in the ALICE experiment ...