### Recent Submissions

• #### Optical velocity meter based on Ramsey oscillations in a double-grating setup ﻿

(American Physical Society, 2014-04)
We propose a method for measuring velocities of atoms or molecules in a gas phase based on time-resolved laser experiments. Two intensity gratings of electromagnetic field with variable time delay τ are created by interfering ...
Journal article
• #### Search for low-scale gravity signatures in multi-jet final states with the ATLAS detector at $\sqrt{s}$ = 8 TeV ﻿

(Springer, 2015-07)
We search for evidence of physics beyond the Standard Model in the production of final states with multiple high transverse momentum jets, using 20.3 $fb^{-1}$ of proton-proton collision data recorded by the ATLAS detector ...
Journal article
• #### Rapidity and transverse-momentum dependence of the inclusive J/$\mathbf{\psi}$ nuclear modification factor in p-Pb collisions at $\mathbf{\sqrt{\textit{s}_{NN}}}=5.02$ TeV ﻿

(Springer, 2015-06)
We have studied the transverse-momentum ($p_{\rm T}$) dependence of the inclusive J/$\psi$ production in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV, in three center-of-mass rapidity ($y_{\rm cms}$) regions, down to ...
Journal article
• #### A Comparative Study of Radiation Environment and Secondary Dose Production in a Particle Therapy Treatment Room Applying Proton, Helium and Carbon Ion Beams ﻿

(The University of Bergen, 2015-11-20)
A treatment room used for radiotherapy is generally heavily shielded and has to fulfil and abide to strict rules and regulations in order to ensure the safety and health of hospital personnel and the general public that ...
Master thesis
• #### Reciprocity calibration of ultrasonic piezoelectric disks in air ﻿

(The University of Bergen, 2015-11-20)
The phase response of a transducer acting as a transmitter or receiver of sound is important in many industrial applications, such as fiscal measurements of natural gas, therein multipath ultrasonic transit-time flow meters, ...
Master thesis
• #### Combined positron emission tomography and computed tomography to visualize and quantify fluid flow in sedimentary rocks ﻿

(AGU (American Geophysical Union) Publications, 2015-09-22)
Here we show for the first time the combined positron emission tomography (PET) and computed tomography (CT) imaging of flow processes within porous rocks to quantify the development in local fluid saturations. The coupling ...
Journal article
• #### Investigation of temperature rise in substation during emergency ﻿

(The University of Bergen, 2015-12-08)
During a TTS verification at Kårstø Processing Plant there where raised a non-conformity to Statoil specification and requirements with regard to temperature rise in substations when HVAC is shut down. One could not ...
Master thesis
• #### Solar radiation energy on the Tibetan plateau ﻿

(The University of Bergen, 2015-11-20)
To gain a thorough knowledge of the solar energy resources on the Tibetan Plateau, measured and modeled solar irradiance levels on the Plateau from July 2010 to September 2013 are considered. The Tibetan Plateau lies in ...
Master thesis
• #### Rydberg Atoms in THz Fields ﻿

(The University of Bergen, 2015-11-17)
Rydberg atoms are highly excited atoms with bizarre and exotic properties such as huge orbits and exaggerated sensitivity to fields. In this study we examine these atoms using classical methods. We present the classical ...
Master thesis
• #### A giant reconstruction of α-quartz (0001) interpreted as three domains of nano dauphine twins ﻿

(Europe PMC, 2015-10-08)
Silica (SiO2) is one of the most common materials on Earth. The crystalline form α-quartz is the stable silica polymorph at ambient conditions although metastable forms exist. α-quartz is a piezoelectric material, it can ...
Journal article
• #### Autonomic Operation of a Large High Performance On-Line Compute Cluster ﻿

(The University of Bergen, 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, ...
Doctoral thesis
• #### A search for high-mass resonances decaying to τ + τ − in pp collisions at √s = 8 TeV with the ATLAS detector ﻿

(Springer, 2015-07-29)
A search for high-mass resonances decaying into τ + τ − final states using proton-proton collisions at √s=8 TeV produced by the Large Hadron Collider is presented. The data were recorded with the ATLAS detector and correspond ...
Journal article
• #### Measurement of the production and lepton charge asymmetry of $\textit{W}$ bosons in Pb+Pb collisions at $\sqrt{s_{\mathrm{\mathbf{NN}}}}=$2.76 TeV with the ATLAS detector ﻿

(Springer, 2015-01-22)
A measurement of $\textit{W}$ boson production in lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}=$2.76 TeV is presented. It is based on the analysis of data collected with the ATLAS detector at the LHC in 2011 corresponding ...
Journal article
• #### Jet energy measurement and its systematic uncertainty in proton–proton collisions at √s=7TeV with the ATLAS detector ﻿

(Springer, 2015-01-15)
The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector using proton–proton collision data with a centre-of-mass energy of s√=7 TeV corresponding to an integrated ...
Journal article
• #### Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at √s = 8 Tev ﻿

(Springer, 2015-01-14)
Searches for heavy long-lived charged particles are performed using a data sample of 19.1 fb−1 from proton-proton collisions at a centre-of-mass energy of s√=8 TeV collected by the ATLAS detector at the Large Hadron Collider. ...
Journal article
• #### Search for the bb¯ decay of the Standard Model Higgs boson in associated (W/Z )H production with the ATLAS detector ﻿

(Springer, 2015-01-14)
A search for the bb¯¯ decay of the Standard Model Higgs boson is performed with the ATLAS experiment using the full dataset recorded at the LHC in Run 1. The integrated luminosities used are 4.7 and 20.3 fb−1 from pp ...
Journal article
• #### Measurement of the t(Formula Presented.) production cross-section as a function of jet multiplicity and jet transverse momentum in 7 TeV proton-proton collisions with the ATLAS detector ﻿

(Springer, 2015-01-08)
The tt⎯⎯ production cross-section dependence on jet multiplicity and jet transverse momentum is reported for proton-proton collisions at a centre-of-mass energy of 7 TeV in the single-lepton channel. The data were collected ...
Journal article
• #### Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb in pp collisions at √s = 8 TeV with the ATLAS detector ﻿

(Springer, 2015-07-29)
A search for the Standard Model Higgs boson produced in association with a top-quark pair, tt¯H, is presented. The analysis uses 20.3 fb−1 of pp collision data at s√=8TeV, collected with the ATLAS detector at the Large ...
Journal article
• #### Search for dark matter in events with heavy quarks and missing transverse momentum in pp collisions with the ATLAS detector ﻿

(Springer, 2015-01-24)
This article reports on a search for dark matter pair production in association with bottom or top quarks in 20.3 fb−1 of pp collisions collected at s√=8 TeV by the ATLAS detector at the LHC. Events with large missing ...
Journal article
• #### Production of Σ(1385)± and Ξ(1530)0 in proton–proton collisions at √s = 7 TeV ﻿

(Springer, 2015-01-10)
The production of the strange and double-strange baryon resonances ((1385)±, Ξ(1530)0) has been measured at mid-rapidity (|y|< 0.5) in proton–proton collisions at √s = 7 TeV with the ALICE detector at the LHC. Transverse ...
Journal article