# General Scientific Meeting 2016 of the Belgian Physical Society

18 May 2016
UGent - Het Pand
Europe/Brussels timezone
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# Poster Session

## Place

Location: UGent - Het Pand
Date: 18 May 16:45 - 18:00

## Contribution List

Displaying 82 contributions out of 82
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 16
SQUID-on-tip (SOT) is the most sensitive detector of small magnetic moments to date [1]. We analyze the performance of such nano-sized SOT (Fig. 1) in the presence of the magnetic field, using the state-of-the-art three dimensional (3D) simulations within the phenomenological Ginzburg-Landau (GL) theory. Based on the observed behavior of the superconducting order parameter in the SOT, the distribu ... More
Presented by Mr. Abul HASNAT RUBEL on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 3
The electron impact ionization of the metastable state $\mathrm{1s2s}\,^3\mathrm{S}$ of helium is particularly important in the modelling of plasmas, and, as a simple system, is also a benchmark for theories. Indeed, there are many theoretical studies devoted to the calculation of the ionization cross section [2, 3], ranging from Born calculations to sophisticated close-coupling calculations. ... More
Presented by Prof. Xavier URBAIN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 21
Ion cyclotron resonance heating (ICRH) is a routinely used method to bring plasmas to fusion relevant temperatures in magnetic confinement fusion machines (see e.g. [1]). Properly modelling the dielectric response is a challenge both from the physics and the computational point of view. More often than not simplifications are made, first of all by truncating the dielectric tensor at the leading or ... More
Presented by Dr. Dirk VAN EESTER on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 44
Self-assembled thiol monolayers (SAMs) are molecular assemblies of organic constituents formed spontaneously by the adsorption process of thiol molecules in liquid or vapor phase on metal or metal oxide surfaces [1]. On the one hand, chemisorption of the adsorbate head group onto metal surfaces at the metal-SAM nano-interface leads to a strong sulfur-metal bond, on the other hand, interactions inc ... More
Presented by Ms. Shova NEUPANE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 38
Since the introduction of high brightness and high efficiency light emitting diodes (LEDs), solid state lighting is ready to take over the lighting and display market. While the original concept of white LEDs (wLEDs) is based on a blue-emitting chip on which a light-converting phosphor is coated, a new approach has gained interest in the last decade [1] (see figure 1). In this so-called remote app ... More
Presented by Mr. Reinert VERSTRAETE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 39
Our society is using ever more complex materials which often involve nanometre-scale morphology. From impurities or minor alloying additions at grain boundaries to nanostructured (composite) materials or the naturally nanostructured electrochemical interfaces: The detailed knowledge of structural and elemental distributions in the bulk as well as on/along the surfaces or interfaces becomes increas ... More
Presented by Prof. Frank Uwe RENNER on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 40
We study the one-dimensional (1D) transport properties of an ultracold gas of Bose-Einstein con- densed atoms through Aharonov-Bohm (AB) rings [1â€“3]. Our system consists of a Bose-Einstein condensate (BEC) that is outcoupled from a magnetic trap into a 1D waveguide which is made of two semi-infinite leads that join a ring geometry exposed to a synthetic magnetic flux Ï†. We specifically inve ... More
Presented by Mr. Renaud CHRÃ‰TIEN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 19
We investigate multiqubit permutation-symmetric states with maximal entropy of entanglement. Such states can be viewed as particular spin states, namely anticoherent spin states. Using the Majorana representation of spin states in terms of points on the unit sphere, we analyze the consequences of a point-group symmetry in their arrangement on the quantum properties of the corresponding state [1]. ... More
Presented by Mr. Dorian BAGUETTE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 56
Metal-Organic Frameworks (MOFs) are crystalline porous materials constructed of metal ions connected by organic linkers. These materials possess many interesting features, like well-defined pore size, pore shape and ultra-high porosity. A characteristic example of MOFs with one dimensional pores is Al-MIL-53 ([Al(OH)(BDC), BDC = terephthalate or 1,4-benzenedicarboxylate]. The 3D framework of as-sy ... More
Presented by Ms. Irena NEVJESTIC on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Biological, Medical, Statistical and Mathematical Physics Board #: 9
We study the possibility of chaos for the Bohmian dynamics when the wave function is stationary. Examples of stationary wave functions are given for which there is chaos, as demonstrated by numerical computations, for one particle moving in 3 spatial dimensions and for two and three entangled particles in 2 dimensions. What is important for the amount of chaos is the overall complexity of the wave ... More
Presented by Prof. John MARTIN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Biological, Medical, Statistical and Mathematical Physics Board #: 36
Iron oxide nanoparticles (NP) are of great interest in nanomedicine. They are used in hyperthermia, tumor targeting, drug delivery therapy and in Magnetic Resonance Imaging (MRI) as negative contrast agent. Because NPâ€™ size and magnetization play a key role in their behavior as MRI contrast agents, these parameters need optimal characterization methods. In this work, we explored the character ... More
Presented by Mr. Daniel HENRARD on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 69
Bimetallic AuxAg1-x clusters with various compositions (x = 0.9, 0.7, 0.4 and 0.2) grown in the gas phase and deposited on amorphous SiO2 wafers and TEM grids were characterized by a combination of aberration corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and grazing-incidence small-angle X-ray scattering (GISAXS). Clusters with an average diameter ... More
Presented by Mr. Ting-Wei LIAO on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 78
In the present work, we present a computational model for studying reactive and partially ionized plasmas in thermo-chemical nonequilibrium under the effect of electromagnetic fields, such as in astrophysics or fusion-related applications. In order to tackle the non-equilibrium effects present in such a plasma, we adopt a multi-fluid formulation including electromagnetic effects. Multi-fluid equat ... More
Presented by Mr. Alejandro ALVAREZ LAGUNA on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 46
The confinement of light to material interfaces and thin layers, i.e., the propagation of surface waves along metal-dielectric interfaces or guided waves along dielectric waveguides, enables a multitude of photonic applications in (bio)sensing, optical circuitry and optical actuation. Several research groups try to enhance our control on the propagation of confined light by making use of artificia ... More
Presented by Ms. Sophie VIAENE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 73
Ion cyclotron wall conditioning (ICWC) is being developed for ITER as a baseline conditioning technique in which the ion cyclotron heating and current drive system will be employed to produce and sustain the current-less conditioning plasma. The TOMAS project (TOroidal MAgnetized System, operated at the FZ-Juelich, Germany) proposes to explore several key aspects of ICWC. This project stands on tw ... More
Presented by Dr. Tom WAUTERS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 41
We present the recent progress in the development of a hydrogen maser in the TE111 mode. Hydrogen masers use the transition at 1420.405 MHz between the two hyperfine levels *F* = 0 and *F* = 1 of the $1s_{1/2}$ ground state of the hydrogen atom [1]. Standard hydrogen masers are heavy devices which are based on the use of a TE011 cylindrical cavity with dimensions of the order of 27 cm [1]. In cont ... More
Presented by Ms. Emeline VAN DER BEKEN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 57
The heating of the solar corona is still an unanswered puzzle for solar physicists. Magnetic reconnection and wave heating models relying on MHD simulations are generally invoked to explain the coronal heating, which ignore some of the physics that occurs due to the interaction between ions and electrons. In the present work we turn to drift waves as a new candidate for the plasma heating mechanis ... More
Presented by Dr. Nataly OZAK on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 74
While attempting to identify the particle content of dark matter, one often assumes that Dark Matter is a particle arising from a supersymmetric theory. When a population thereof becomes gravitationally bound in the Sun, mutual annihilations can produce a flux of neutrinos. By estimating how this flux would be recognised by a neutrino telescope one can then make conclusions about whether the propo ... More
Presented by Christoph RAAB on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 62
Small atomic objects such as molecules and atomic clusters play a key role in bottom up approaches to tailor properties of matter and constitute fundamental building blocks for the synthesis of new advanced materials. Due to quantum confinement effects, small clusters with a countable number of atoms show entirely new physical phenomena without equivalent in bulk materials [1]. The strong size dep ... More
Presented by Mr. Vyacheslav ZHARINOV on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics
The EAGLE cosmological simulations reproduce the observed galaxy stellar mass function and many galaxy properties to unprecedented levels of agreement. In this work, we study the dust-related properties of present-day EAGLE galaxies through mock observations in the far-infrared and submm wavelength range obtained with the 3D dust radiative transfer code SKIRT. Specifically, we select a set of reds ... More
Presented by Mr. Peter CAMPS
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 33
Recently, frequency comb generation using time modulated planar graphene sheets was introduced by Ginis et al. Here we show that this process is more efficient in a graphene ribbon lattice than in a planar structure. To do so we exploit the plasmonic resonances of the lattice, which are very sensitive to the graphene doping level. By dynamically changing this doping the transmission becomes t ... More
Presented by Mr. Galaad ALTARES MENENDEZ on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 30
Ever since the polaron concept was introduced by Landau in 1933 to describe the quasiparticle arising from the interaction between an electron and the polarization cloud it drags along while moving in a polar crystal, a wide variety of physical systems have been mapped on the polaron problem. Among these realizations, one that has been the focus of much attention in the recent years is the BEC pol ... More
Presented by Mr. Giovanni LOMBARDI on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 60
The DustPedia project aims at conducting a definitive study of interstellar dust in the Local Universe, by gathering multi-wavelength imaging data of nearby galaxies, and modelling them with state-of-the-art modeling tools. As part of the DustPedia project, we create 3D models for a representative set of nearby galaxies using the radiative transfer code SKIRT. We simultaneously derive the 3D distr ... More
Presented by Mr. Sam VERSTOCKEN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 71
The main objective of the stellarator Wendelstein 7-X (W7-X) is to show the potential of optimized stellarators. The main heating system is ECRH up to 10 MW steady-state at 140 GHz. NBI is also foreseen in pulses up to 10 s. An important aim of W7-X is to demonstrate fast ion confinement at volume averaged beta values up to 5%, corresponding to plasma densities above 1020 m-3. Mimicking the behavi ... More
Presented by Dr. Jozef ONGENA, Dr. Fabrice LOUCHE, Dr. Andre MESSIAEN, Mr. Michel VERVIER, Dr. Yevgen KAZAKOV, Dr. Dirk VAN EESTER on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 47
IShTAR (Ion Sheath Test ARrangement), a facility located at the Max-Planck Institut fÃ¼r Plasmaphysik in Garching (IPP-MPG Germany), is dedicated to the investigation of the interactions between an ICRF antenna and a plasma [1, 2]. It is an international collaboration with three main partners: University of Lorraine (France), Ghent University (Belgium), and IPP-Garching and other universities. In ... More
Presented by Dr. Kristel CROMBE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 75
In high-energy elementary particle physics many searches for new physics phenomena, as well as precision measurements in the top quark and Higgs boson sector, rely on the identification of jets originating from b-quarks. This process is also known as b-tagging. The hadrons produced in the decay of b-quarks have characteristics which, within the framework of a detector such as the CMS-detector, can ... More
Presented by Mr. Kevin DEROOVER on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 67
Accurate identification of jets originating from b quarks has been of prime importance for many measurements and searches in CMS. The development of a charm tagger, a tool to identify jets initiated by charm quarks, will be no different, allowing analysts to broaden the spectra of their research. We detail the technique that was used to train an MVAâ€“based discriminator to tag charm jets, its exp ... More
Presented by Mr. Seth MOORTGAT on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Biological, Medical, Statistical and Mathematical Physics Board #: 22
About 1% of the world population is affected by an allergy for peanuts which is the most common cause of fatal-food-related anaphylaxis. Due to the high risk of exposure and the fact that doses of a few milligrams can cause such an allergic reaction, a lot of research has been done towards the detection of these immunogenic proteins. The protein Ara h1 was identified as the culprit in 95% of all a ... More
Presented by Mr. Wouter STILMAN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 27
The use of infrared emitting persistent phosphors for medical imaging is an exciting application in the field of persistent luminescence [1]. Current research focuses on host materials doped with Mn2+ or Cr3+, as these transition metals show emission at wavelengths larger than 600 nm, which falls in the tissue transparency window [2]. In this work, we focus on Cr-doped LiGa5O8 (LGO), which is one ... More
Presented by Mr. Olivier Q. DE CLERCQ on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 43
Lithium-ion batteries are considered as power source for electric vehicles (EV), as well as off-grid energy storage for power plant. These specific applications drive the research on high energy density, cost-effective, safe and environmental friendly battery materials. Silicon, the earth crustâ€™s 3rd abundant material, shows very promising properties for use in battery anodes, such as the highes ... More
Presented by Dr. Yueming ZHENG on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 48
At hadron colliders, top quarks - the heaviest elementary particles known- are dominantly produced in pairs (ttbar), a production mechanism having been discovered more than twenty years ago at Tevatron, Fermilab. Although the ttbar process has already entered the domain of 'precision' Physics, especially with the advent of the multi-TeV energies at the CERN Large Hadron Collider, there still rema ... More
Presented by Mr. Georgios Konstantinos KRINTIRAS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 4
Modelling of stellar atmospheres requires various detailed and accurate data on different processes such as the mutual neutralization (MN) of cation-anion pairs that can affect atomic species of interest. Indeed, neutralization reactions play an important role in atmospheric and astrophysical processes. Furthermore, there is a strong demand from the astrochemical community for information about th ... More
Presented by Mr. Thibaut LAUNOY on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 25
Since the discovery of the exchange bias phenomenon, which is a shift in the hysteresis loop when coupling a ferromagnet (FM) to an antiferromagnet (AFM), a lot of scientific efforts were made in order to explain this effect. Although exchange bias is widely used in spin valves, itâ€™s origin is not yet completely understood and sometimes obscured by the disorder in the antiferromagnetic grains a ... More
Presented by Mr. Jonas DE CLERCQ on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 52
In recent years, there has been substantial development in accelerator-based neutrino-oscillation experiments. The quest for more precise measurements of the neutrino mass-squared differences and mixing angles in these experiments, faces a number of challenges. These are related to the large systematic uncertainties associated with the basic underlying neutrino-nucleus signal in the detector. Majo ... More
Presented by Dr. Vishvas PANDEY on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 1
X-ray emission lines from accreting sources, most notably the K_alpha- and K_beta-lines from iron ions, have observed widths and shifts which imply an origin very close to the compact object in many cases [1]. The inferred line origin can be near either the innermost stable circular orbit or the event horizon in the case of a black hole. The intensity of these lines can provide insight into the am ... More
Presented by Mr. JÃ©rÃ´me DEPRINCE, Dr. Pascal QUINET on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 18
Atomic Layer Deposition (ALD) is a technique for the deposition of uniform thin films with a thickness control on the atomic scale. Due to the self-limited nature of the surface reactions, it is possible to grow uniform thin films with an excellent conformality. Therefore ALD has become a key method for coating and functionalizing 3D large surface area structures such as anodized alumina (AAO), s ... More
Presented by Mrs. VÃ©ronique CREMERS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 5
Anions play important roles in the chemistry of various astrophysical environments ranging from planetary and stellar atmospheres to interstellar clouds [1-3]. A key reaction for the ionization balance in those media is the Mutual Neutralization (MN) of atomic or molecular anions and cations [3]: A$^+$ + B$^-$ $\rightarrow$ A + B. MN studies with atomic ions have so far mainly been limited to c ... More
Presented by Mr. Arnaud DOCHAIN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Biological, Medical, Statistical and Mathematical Physics Board #: 17
Iron-oxide nanoparticles are used as negative contrast agents in Magnetic Resonance Imaging (MRI)1. Their great magnetization induces magnetic inhomogeneities which shorten the relaxation times. Their efficiency can be quantified by their relaxivities, i.e. their relaxation rates normalized by the iron concentration. Cells loaded by iron oxide nanoparticles are commonly used to track tumor cell ... More
Presented by Dr. Quoc Lam VUONG on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 13
Reactive DC magnetron sputtering is a common technique to deposit compound films. Starting from an elemental metal target, the composition on the substrate can be altered by adjusting the reactive gas flow. However, at given sputtering conditions, a transition in operating conditions is noticed at critical reactive gas flow rates inducing the well-known hysteresis effect during reactive sputtering ... More
Presented by Mr. Roeland SCHELFHOUT on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 7
We consider the in-plane anisotropy of thick organic layers obtained by Langmuir-Blodgett technique. As the optical axis of theses Y-type structures lays in the incidence plane, the optical properties can be obtained from standard spectroscopic ellipsometry (SE) measurements [1]. Ordinary ($n_o$) and extraordinary ($n_e$) complex refraction indexes are characterized for Cd$^{2+}$-stabilized arach ... More
Presented by Mr. Corentin GUYOT on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 79
M. Tripsky$^{1,2}$, T. Wauters$^{1}$, A. Lyssoivan$^{1}$ $^{1}$Laboratory for Plasma Physics-ERM/KMS, 1000 Brussels, Belgium $^{2}$Ghent University, Department of Applied Physics, 9000 Ghent, Belgium The RFdinity1d3v particle-in-cell Monte Carlo collision (PIC-MCC) model is used to study discharges produced and sustained by ion cyclotron range of frequency (ICRF) waves in absence of pla ... More
Presented by Mr. Matej TRIPSKY on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 66
The Compact Muon Solenoid (CMS) detector installed at the CERN Large Hadron Collider (LHC) has an extensive muon system which provides information simultaneously for identification, track reconstruction and triggering of muons. The extreme particle rates and high integrated charge expected during the High Luminosity phase of the LHC (HL-LHC) impose the need to upgrade several parts of the CMS dete ... More
Presented by Ms. Sinem SALVA on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 45
The increasing world energy demand in combination with the dependency on limited fossil fuels results in a lot of stress on global climate and the geopolitical situation. Most energy scenarios emphasise the importance of innovations not only on the generating side e.g. by renewable energy, but also on the consumer side e.g. by more energy efficient lighting or personal electronics devices. Recentl ... More
Presented by Mr. Jakob KUHS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 32
The preliminary design of an Ion Cyclotron Range of Frequency traveling-wave antenna, based on a comb-line structure in a resonant ring, is presented. The design maximize the coupled power to the inhomogeneous plasma giving an operation band characterized by an almost perfect matching to the generator(s) with a simple feeding system. The antenna system is suitable for the operation in a fusion dev ... More
Presented by Riccardo RAGONA on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 63
We overview the current and planned experiments in high-energy hadron physics, which are aimed to investigate unresolved issues in our understanding of the intrinsic structure of the strong interacting particles. Special emphasis is put on the spin- and transverse momentum- dependent correlations of the fundamental constituents of the nucleons - quarks and gluons.
Presented by Igor CHEREDNIKOV on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 53
Detection and quantification of trends of key quantities in terms of a set of â€˜predictorâ€™ variables is a common task in fusion data analysis, as in many other areas of science, for model building and experimental planning. In fusion science, the standard way to handle the corresponding regression analysis problem is by means of a linear or power-law regression function and ordinary least squar ... More
Presented by Prof. Geert VERDOOLAEGE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 15
A search for new physics is performed using events with multileptons ( â‰¥ 3 electrons or muons) in the final state using the CMS detector. Results are based on a sample of proton-proton collisions at a centre-of-mass energy of 13 TeV at the LHC corresponding to an integrated luminosity of 2.3 fb$^{âˆ’1}$. Search regions have been defined by the number of b-tagged jets, missing transverse energy, ... More
Presented by Mr. Illia KHVASTUNOV on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 68
I will present a generic search for a heavy scalar boson using 13 TeV proton-proton collision data acquired by the CMS experiment in 2015. Events in the decay channel H->ZZ->2l2v are selected from data corresponding to an integrated luminosity of 2.3 fb^-1. An analysis of the reconstructed transverse mass and missing transverse energy is performed in different event categories, and limits are ... More
Presented by Mr. Hugo DELANNOY on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 72
Dark matter is necessary to explain multiple astrophysical observations that appear to be the result of the presence of mass which cannot be seen using light or other electromagnetic waves. One way to search for dark matter is through production at colliders, such as the LHC at CERN. A search for new physics has been performed at the CMS experiment using events having large missing transverse mome ... More
Presented by Isabelle DE BRUYN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 8
In recent years there has been an increased interest in the use of a medium resolution semiconductor CdZnTe (CZT) detector for gamma-ray spectroscopy and in safeguards applications. However, due to the different mobility and lifetime of electrons and holes in the crystalâ€™s sensitive volume, a CZT detector shows an asymmetrical peak characterized by low-energy tailing. The type and settings o ... More
Presented by Mr. Iaroslav MELESHENKOVSKII on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 12
With this work we aim at studying with more details the highly multiscale kinetic process of magnetic reconnection occurring at the dayside magnetopause. This process is partially responsible for geomagnetic substorms and capable of producing highly energetic particles. In particular, we present results on the electron dynamics from fully kinetic Particle-in-Cell (PIC) simulations. The ultimate ai ... More
Presented by Mr. Emanuele CAZZOLA on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 37
We study a topological superconductor capable of exchanging particles with an environment. The isolated superconductor is known to undergo a phase transition, which vanishes when the system is coupled to an environment. However, we show how signatures of the phase transition can still be observed, playing an important role in the particle-exchange mechanism. These results are obtained by modell ... More
Presented by Mr. Pieter CLAEYS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 26
Radiative transfer simulations that describe the propagation of light from and through astronomical objects are gaining more and more importance when interpreting observational data. One observational signature that has not been fully exploited is polarization, which is mainly due to scattering off electrons and dust grains. Recently, this potential is being realized, and a growing number of radia ... More
Presented by Mr. P. Christian PEEST on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 50
Membranes and their size-selective filtering properties are universal in nature and their behaviour is exploited to design artificial membranes suited for, e.g., molecule or nanoparticle filtering and separation. Exploring and understanding penetration and transmission mechanisms of nanoparticles in thin film systems may provide new opportunities for size selective deposition or embedding of the n ... More
Presented by Dr. Zhe LI on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 65
This poster will cover the novel technology used in the SoLid experiment and will discuss the first results of the SubModule1 prototype.
Presented by Ms. Celine MOORTGAT on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 23
Ionizing radiation exposure represents one of the most important health risk for astronauts in space. Radiation dose rates in space are typically more than two orders of magnitude higher than on Earth. Therefore, it is of primordial importance to monitor the astronautsâ€™ radiation doses. However, space dosimetry is very challenging due to the high complexity of the space radiation field consis ... More
Presented by Mr. Alessio PARISI on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 58
Johan van der Tol, Dewei Jia, Yejun Li, Valeriy Chernyy, Joost Bakker, Minh Nguyen, Ewald Janssens Silver clusters composed of a few atoms are very interesting for photography and redox catalysis. This is mainly because of their size dependent optical properties and a strong interplay between their geometric and electronic structure, which has a discrete density of states. Despite the wide i ... More
Presented by Mr. Johan VAN DER TOL, Mrs. dewei JIA on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics
Metal doped silicon clusters have attracted a lot of interest the past decades. Fundamental understanding of small metal doped silicon clusters and their bonding is relevant for nanoscale silicon components in optoelectronic and semiconductor devices. Here, we have explored the geometric, electronic and magnetic properties of cationic doped silicon clusters (Si_nAg^+ (n = 6âˆ’15), Si_nAu^+ (n = 2â ... More
Presented by Mr. Yejun LI
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 54
**Abstract** We present the results of the characterization of the topological insulator (TI) Bi2Te3 in four different environments using scanning probe microscopy (SPM) based techniques. Upon exposure to air at room temperature the cleaved surface of the pristine Bi2Te3 is observed to be strongly modified during scanning tunneling microscopy (STM) measurements. Remarkably, there is no surface ... More
Presented by Ms. Asteriona-Maria NETSOU on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 28
We derive and solve a markovian master equation for the internal dynamics of an ensemble of indistinguishable two-level atoms including all effects related to the quantization of their motion [1]. Our equation provides a unifying picture of the consequences of recoil and indistinguishability of atoms beyond the Lamb-Dicke regime on both their dissipative and conservative internal dynamics, and is ... More
Presented by Mr. FranÃ§ois DAMANET on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 34
Luminescent materials or phosphors play an important role in many everyday applications such as lighting and displays. These phosphors consist of a host compound doped with luminescent ions called activators. Almost all the commercial phosphors used today are activated by lanthanide ions[1]. However, a few years ago the rare-earth market was struck by a crisis when China, the leading exporter of r ... More
Presented by Mr. David VAN DER HEGGEN, Mr. Jonas J. JOOS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 35
Luminescent materials, also known as phosphors, are an essential component of white light emitting diodes (LEDs). White LEDs consist of a blue emitting LED chip and one or more phosphor materials which convert part of the blue light to longer wavelengths. In order to mimic the spectrum of a black body radiator as closely as possible, luminescent materials showing broad emission bands are used. For ... More
Presented by Lisa MARTIN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 64
The CERN engineering and physics departments designed and built the new Gamma Irradiation Facility (GIF++) which is fully operational since March, 2015. The GIF++ is motivated by strong needs from the LHC detector and accelerator communities to perform long term ageing studies. It is a unique facility where high energy charged particles beam (mainly muons) are combined with a flux of photons (662 ... More
Presented by Mr. Muhammad GUL, Mr. Nicolas ZAGANIDIS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 6
The goal of the ESA ITT project AO-1-8384-15-1-NB VSWMC-Part 2 is to further develop the Virtual Space Weather Modelling Centre (VSWMC), building on the Phase 1 prototype system and focusing on the interaction with the ESA SSA SWE system. The objective and scopes of this project include: 1. The efficient integration of **new models** and **new model couplings**, including a first **demons ... More
Presented by Prof. Stefaan POEDTS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 24
The Voltage Control of Magnetic Anisotropy (VCMA) effect allows to control a magnetic bit by means of an electric field [1] instead of high currents, enabling a much lower power consumption. State-of-the-art Magnetic Tunnel Junction (MTJ) material stacks using mostly MgO as a dielectric have been screened for VCMA applications [1,2]. The MgO VCMA effect is currently too weak for use in logic and m ... More
Presented by Mr. Bart VERMEULEN, Dr. Koen MARTENS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 55
The field of materials design occupies itself with the search for materials that exhibit specific properties. Such materials can be obtained by finetuning promising candidates using defects or by synthesizing entirely new materials based on experience from nature. This requires a detailed understanding of the nanoscale features which gives rise to these properties, as well as considerable experime ... More
Presented by Mr. Michael SLUYDTS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 2
The photodetachment of the negative ion of oxygen, although a seemingly simple process, is the subject of a long lasting discrepancy between theory and experiment. On the experimental side, the reference values for the photodetachment cross section are those of Smith and Branscomb *et al.* [1, 2], which have been widely used to put other relative measurements on an absolute scale. On the theo ... More
Presented by Prof. Xavier URBAIN on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 59
**Jeroen E. SCHEERDER**$^1$ , Bart RAES$^2$, Marius V. COSTACHE$^2$, Frederic BONELL$^2$, Juan F. SIERRA$^2$, Jo CUPPENS$^2$, Sergio O. VALENZUELA$^{2,3}$ and Joris VAN DE VONDEL$^1$ *$^1$ INPAC - Institute for Nanoscale Physics and Chemistry, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium* *$^2$ Catalan Institute of Nanoscience and Nanotec ... More
Presented by Mr. Jeroen SCHEERDER on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 61
During the High Luminosity phase, the CERN Large Hadron Collider (HL-LHC) will produce particle collisions at intensities about 10 times higher than its design value. In turn, this will induce much higher particle background rates in the accelerator and the effects integrated over a long period of time will present a new challenge for the LHC detectors such as the Compact Muon Solenoid (CMS). In p ... More
Presented by Mr. Alexis FAGOT on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 49
The first technological SDHCAL prototype having been successfully tested, a new phase of R&D, to validate completely the SDHCAL option for the International Linear Detector (ILD) project of the ILC, has started with the conception and the realization of a new prototype. The new one is intended to host few but large active layers of the future SDHCAL. The new active layers, made of GRPC with sizes ... More
Presented by Mr. Antoine PINGAULT on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 20
The current-voltage characteristics used in DC sputtering are inadequate to describe high power impulse magnetron sputtering (HiPIMS). A comparative study of materials (Mg, Cu, Ti, Nb, Cr, V, Zn, Al,...) and material conditions for HiPIMS deposition under Ar, and Ar + O$_2$ ambient is undertaken. A comparison is made in the voltage-current-time diagrams using a Melec sipp 2000 powerbank combined w ... More
Presented by Mr. Filip MOENS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics Board #: 31
InterstellarÂ dustÂ absorbs and scatters nearly half of the starlight in the Universe, heavily influencing our view on galaxies. Furthermore, itÂ plays a crucial role in several astrophysicalÂ processes. A fullÂ understanding of the dust properties and theÂ interplay between dust and starlight is essential toÂ probe the current andÂ past star formation activity and to constrain the cosmic star for ... More
Presented by Mrs. Marjorie DECLEIR on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 51
Atomic layer deposition (ALD) is a thin film deposition technique in which the growing film is alternately exposed to typically a chemical precursor and a gas (reactant), each reacting with the surface in a self-limited way. This results in the sequential deposition of mono or sub-monolayers of material and enables the deposition of thin films with precise thickness control and excellent conformal ... More
Presented by Mr. Matthias MINJAUW on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Biological, Medical, Statistical and Mathematical Physics Board #: 29
Irritable bowel syndrome (IBS) is a disease affecting up to 15% of the population in the developed world. Symptoms such as abdominal pain, diarrhea, constipation and psychological problems negatively affect the patientâ€™s life leading to an economical burden on society due to an increased absence from work and costs related to medical care. The exact cause of IBS is still up for debate but over t ... More
Presented by Mr. Gideon WACKERS on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Astrophysics, Geophysics and Plasma Physics
Turbulence is the physical phenomenon responsible for the cascade of energy from large scales, where energy is injected, to small scales, where the energy can eventually be dissipated. Turbulence is ubiquitous in space plasmas and its features in the different regions of the heliosphere (like solar wind, magnetosphere, solar corona ...), along with the mechanisms at small scale responsible f ... More
Presented by Dr. Francesco PUCCI
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 70
After the upgrades of the Large Hadron Collider (LHC) planned for the second and the third Long Shutdown (LS), the LHC luminosity will reach values up to 2Ã—10^34cmâˆ’2sâˆ’1 and 5Ã—10^34cmâˆ’2 sâˆ’1 respectively. Such conditions will deeply affect the performance of the CMS muon system, especially in the very forward region, due to the harsh expected background environment and the reduced magnetic ... More
Presented by Mr. Thomas LENZI on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 76
In proton therapy, proton beams with energies up to typically 230 MeV are used to treat cancerous tumours very efficiently while sparing surrounding healthy tissues as much as possible. Due to nuclear interactions of the proton beams with matter, mainly inside the cyclotron, the beam line, the treatment nozzle and the patient, secondary neutrons with energies up to 230 MeV are unfortunately produc ... More
Presented by Mr. David NDAYIZEYE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 77
Vanadium dioxide (VO$_2$) is a material that shows an insulator to metal transition (IMT) near room temperature. This property can be exploited for applications in field effect devices, electro-optical switches and nonlinear circuit components. We have prepared VO$_2$ thin films on silicon wafers with a native oxide by combining a low temperature MBE growth with an ex-situ annealing at high temper ... More
Presented by Pia HOMM on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Fundamental Interactions, Nuclear and Particle Physics Board #: 14
A feasibility study is presented for Vector Boson Scattering measurements in the WZ final state, that can be performed during the high luminosity phase of the LHC. Particular emphasis is given to the expected performances of the detector in different upgrade scenarios, which are compared to each other and to the results attained with the current, aged technology.
Presented by Mrs. Deniz POYRAZ on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 10
Vortices and vortex arrays in superfluid atomic Fermi gases in the BCS-BEC crossover are investigated within the finite temperature effective field theory (EFT) [1-4] for a macroscopic wave function representing the field of condensed pairs, analogous to the Ginzburg-Landau theory for superconductors. Here, we have established how rotation modifies this effective field theory, by rederiving it sta ... More
Presented by Dr. Serghei KLIMIN, Prof. Jacques TEMPERE on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Atoms, Molecules, Optics and Photonics Board #: 42
**YAGG:Cr$^{3+}$ luminescence** : influence of synthesis on luminescent properties J.H. Bouman $^{1}$, M.Tiberi $^{2}$, O.Q. De Clercq $^{1}$, K. Korthout$^{1}$, P.F. Smet $^{1}$ and D. Poelman $^{1}$ $^{1}$ Lumilab, Dept. Solid State Sciences, Ghent University, Ghent, Belgium $^{2}$ Nanomaterials and Interfaces Group (NIG), Chemistry Dept., University of Milan, Milan, Italy Synth ... More
Presented by Mr. Jesse BOUMAN, Ms. Marta TIBERI on 18/5/2016 at 14:45
Type: Poster contribution Session: Poster Session
Track: Condensed Matter and Nanostructure Physics Board #: 11
Superparamagnetic iron oxide particles find their main application as contrast agents for cellular and molecular Magnetic Resonance Imaging (1). The contrast they bring is due to the shortening of the transverse relaxation times T1 and T2 of water protons (2). In order to understand their influence on proton relaxation, different theoretical relaxation models have been developed, each of them pres ... More
Presented by Dr. Yves GOSSUIN on 18/5/2016 at 14:45