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The Institut Laue-Langevin (ILL) is the world's leading facility in neutron science and technology. It operates the most intense neutron source on earth in Grenoble in the south-east of France.

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Gravitational and whispering-gallery quantum states were discovered at the ILL, Grenoble, in experiments with slow neutrons. These phenomena provide a unique example of the so-called quantum bouncing of particles of matter on a surface. On the one hand, they allow us to constrain/explore fundamental physics phenomena beyond the Standard Model of particle physics. On the other hand, they are extremely sensitive to changes to surface potentials and, thus, provide an excellent tool for materials science.
A recent textbook [1] explains the whole of quantum mechanics using this single phenomenon and justifies why it should be the subject of precision studies. It describes in detail the phenomena involved and the experimental methods used. In short, the neutron whispering gallery is a quantum phenomenon which may appear, for instance, when a neutron with a velocity of ~103 m/s moves near a concave cylindrical mirror with a radius of a few cm at a distance of ~101-102 nm. It can be explored by simultaneously measuring, under certain conditions, the longitudinal and tangential neutron velocities. The figure shows a typical interference pattern. Even minor changes to the mirror surface potential (thin surface films, gas adsorption, etc.) would affect some features of such an interference pattern.
[1] V.V. Nesvizhevsky and A.Yu. Voronin, Surprising Quantum Bouncing, Imperial College Press,
UK, 2015

Activities of the trainee:
This Master’s thesis internship proposal consists of measuring such interference patterns for various mirror surfaces, treating the data, and analysing them with a view to evaluating the surface potentials. We have obtained cylindrical mirrors of sufficient quality and investigated them experimentally. The student will apply surface coatings to the mirrors, study the mirrors with/without the coatings using neutron reflectometers (D17), treat the data using standard programs and analyse them using existing theoretical formalism. Such an analysis is relatively complex when a high precision is required. It might therefore be associated with further development of the software. This makes the work interesting and challenging. Furthermore, the results expected from this project will provide an unprecedented insight into sensitivity to surface phenomena.

Key words: neutron whispering gallery; cold neutrons; neutron reflection; surface potentials; thin films; extreme sensitivity
Level required: 5th year university studies in physics
Notes: This post is an internship with a maximum duration of 5 months
Please send your application directly to the supervisor: Valery Nesvizhzvski , email: nesvizh(at)


The detection of gamma rays emitted by excited nuclear states using a symmetric system of Ge detectors such as the FIPPS array at the ILL makes it possible to determine the spin and parities of the states through angular correlation measurements. This information is used to benchmark the theoretical models describing the structure of nuclei.
FIPPS is a new instrument and ran its first experimental campaign at the beginning of 2017. A systematic study of source/in-beam data and Monte Carlo simulations are needed in order to determine the geometry factors to be used to account for the finite dimensions of the detectors and the variation of the detector response as a function of energy.

Activities of the trainee:
The trainee will learn how to measure angular correlations between coincident gamma rays. He/she will analyse source/in-beam data from the first FIPPS experimental campaign. He/she will conduct a systematic study of such correlations as a function of gamma-ray energy and develop the part of the Monte Carlo simulation code for establishing the geometrical corrections to the experimental data. 

Level required: 3rd year university studies in physics
Notes: This post is an internship with a maximum duration of 3 months
Please send your application directly to the supervisor: Caterina Michelagnoli, email: michelagnolic(at)


High-resolution nuclear structure studies rely on the sensitivity of germanium detectors. The co-axial geometry is commonly used for gamma-ray spectroscopy studies at accelerator and neutron beam facilities. In detector arrays such as FIPPS at the ILL, 4 co-axial germanium crystals share the same cryostat in the so-called “clover” configuration. The energy deposited in the different crystals of the same clover by Compton-scattered gamma rays is “added-back” in order to recover the full energy of the gamma rays. This procedure dramatically improves the peak-over-background and efficiency of such devices.
In order to preserve resolution and adequate energy calibration in the energy spectra after add-back, the cross-talk among the different detectors of the same clover has to be taken into account. Due to this effect, when multiple crystals in a clover are hit at the same time, the measured energy in each crystal is less than the actual energy. This is due, on the one hand, to the presence of transient signals induced in neighbouring crystals and, on the other hand, to a capacitance effect in the signal readout electronics circuit. The cross-talk effect must be corrected in order to guarantee the energy resolution needed for spectroscopic studies. A systematic study as a function of gamma-ray energy is needed as well as a modelling of the effect by analysing the shapes of digitized signals.

Activities of the trainee:
The trainee will analyse FIPPS source and in-beam data in order to study the cross-talk effect of FIPPS clovers. He/she will use analysis programs already developed at FIPPS and improve them on the basis of his/her own investigation. He/she will analyse raw waveforms in order to model the effect.

Level required: 3rd year university studies in physics
Notes: This post is an internship with a maximum duration of 3 months
Please send your application directly to the supervisor: Caterina Michelagnoli, email: michelagnolic(at)


Nuclear structure studies through gamma-ray spectroscopy as well as many applications rely on a knowledge of the position of the gamma-ray emitting source. With standard germanium detectors (such as the ones of the FIPPS array at the ILL), the backtracking of the gamma-ray emitting source is limited by the finite size of the detectors. New-generation arrays (such as AGATA, the result of the efforts of a European collaboration) are made up of segmented germanium detectors and pulse-shape analysis techniques are used to reconstruct the gamma interaction points in the germanium medium with a precision down to 5mm.
One of these detectors is available at the ILL, and, once put in operation and tested, could be used for reconstructing the gamma-ray source position at FIPPS. If this technique were successful, this would pave the way for a new ancillary system at FIPPS that would help to suppress the gamma background (by identifying the gamma rays that are not coming from the source) as well as for applications requiring the localisation of the source of gamma rays.

Such a detector can also be used for neutron scattering experiments. The tracing of gamma rays described above will make it possible to identify the neutrons that are captured by the sample, which are not usually taken into account. At the same time, the gamma-ray signal would provide information on the chemical/isotopical composition of the sample as it is irradiated by the neutron beam of the scattering experiment. A similar technique, but with a simple Ge detector, has already been used in reflectometry experiments (D17, Figaro). From these experiments, it is clear that the ability to distinguish gamma rays from the sample and the background would boost sensitivity enormously.

Activities of the trainee:
The trainee will become familiar with segmented HPGe technology both from a theoretical and an operational point of view. He/she will deal with the cooling of the detector and the testing of the different channels. He/she will test the electronic chain for treatment of the signals and storage of the raw traces. He/she will determine the cross-talk properties of the detector and perform Pulse-Shape Analysis of source data. He/she will develop his/her own imaging code for source position reconstruction.

Level required: 3rd year university studies in physics
Notes: This post is an internship with a maximum duration of 3 months
Please send your application directly to the supervisor: Caterina Michelagnoli, email: michelagnolic(at)


Hydrogen is an important energy carrier in connection with carbon-free energy production. Unfortunately, hydrogen reactions in fuel cells and water electrolysers require the use of catalysts, which generally contain substantial amounts of expensive noble metals such as platinum. To reduce the need for platinum and to lower catalyser costs, several materials are being studied, among which our group - in collaboration with research groups from Germany – is concentrating on molybdenum disulphide (MoS2). In fact, MoS2 is a promising candidate for the cathode of polymer electrolyte membrane (PEM) electrolysers, but it is not clear how hydrogen moves in MoS2 and at which sites of the material the catalytic activity is located. We have already performed diffraction, diffusion and spectroscopy experiments on this system and further experiments are planned for 2018. The data obtained has given us an insight into the location and motion of hydrogen from Å to micrometre length scales. Based on this data and using computational modelling, we aim to find out how MoS2 catalysts can be optimised.

Activities of the trainee:
The trainee will take part in a new project on hydrogen catalyst materials that has been started in collaboration with research groups from Germany. The trainee will perform classical molecular dynamics simulations as well as density functional theory calculations of hydrogen in MoS2. He/she will also analyse neutron spectroscopy data and, provided the internship takes place during reactor operations, will have the opportunity to participate in a neutron scattering experiment. The internship will provide an opportunity to gain an inside view of the power and limitations of present theoretical and experimental techniques for the study of energy materials via the study of molecular dynamics.

Key words: self-assembly; surfactants; small-angle scattering
Level required: 3rd year university studies in chemistry or physics with some computing background
Notes: This post is an internship with a maximum duration of 3 months
Please send your application directly to the supervisor: Peter Fouquet, email:  fouquet(at)


The growing scientific interest in the physical properties of matter in extreme conditions such as very high pressure and temperature calls for dedicated and optimized experimental tools. Time-of-Flight (ToF) spectrometers are in principle the instruments of choice to meet the scientific interests and quality standards required for extreme-condition experiments. However, the ToF instruments currently available have not been optimized for such studies. We are planning to perform a design study of a hybrid ToF spectrometer, i.e. a ToF instrument equipped with a monochromator and chopper system, for optimum performance in extreme conditions and with small samples. This design study will be based on Monte Carlo simulation techniques (McStas) developed and optimized for neutron ray-tracing computation. The necessary software packages are available at the ILL and can be run in a standard operation mode. Expertise in, and hardware components for, running the software packages are present. Preliminary design studies of an instrument called RAMSES (RApid Measurement and Special Environment time-of-flight Spectrometer) have been already performed. For these reasons, we believe it will be possible to complete the optimization work within four months, a period well suited to a student internship.

Activities of the trainee:
The trainee’s activities will primarily involve computer simulations, together with a few analytical analyses, for the design of the hybrid time-of-flight instrument located at the end position of a dedicated cold-neutron guide:
* Definition of a dedicated guide (new H15) for the hybrid ToF instrument RAMSES III (McStas calculations)
* Optimization of guide components for best performance in terms of flux and divergence (McStas calculations)
* Identification of central components of the primary spectrometer and their geometry for best performance in the time-focusing mode
* Optimization of the primary spectrometer components for best performance for experiments on mm3-sized samples.
Key words: computer simulation; ray tracing calculation; neutron spectroscopy
Level required: 4th year university studies in physics
Notes: This post is an internship with a maximum duration of 4 months
Please send your application directly to the supervisor: Michael Koza, email: koza(at)


Oxygen ion conductors at low temperatures are materials of major interest for a host of applications, such as fuel cells, battery electrodes and sensors. The discovery of oxygen reversible intercalation into Brownmillerite-type structures down to moderate temperatures is considered of paramount importance. Despite this, SrFeO2.5 has been shown to be a good conductor down to RT, while the iso-structural CaFeO2.5 material only conducts oxygen at high temperatures (over 1000 K). Inelastic neutron scattering (INS) studies on solid solutions of Sr1-xCaxFeO2.5 (chemical disorder) have revealed dramatic differences in the low energy part of vibrational DOS (density of states). At the same time, Raman spectra on end members are also drastically different. Similarly, Sr2ScGaO5 shows good ionic conduction at moderate temperatures, but the Brownmillerite-type structure, with ordered SC, Ga and vacancy sites, and the cubic-related structure, with random Sc Ga and vacancy positions, differ in the onset temperature of conduction and conduction mechanism. This is reflected again in the difference observed in the low energy part of vibrational DOS and Raman spectra.
To understand the microscopic origin of these differences, detailed DFT (density functional theory) calculations on several solid solutions of Sr1-xCaxFeO2.5 and random vacancy supercells of Sr2ScGaO5 are necessary. The experiments will allow us to validate the calculations and the calculations can then be used to gain a better understanding of the material's properties.
The results will shed light on the way that chemical or structural (other than oxygen) disorder affects the ionic conduction properties of this material, helping us to gain a deeper understanding of the factors which promote or hinder ionic conduction.

Activities of the trainee:
The trainee will run advanced level simulations (solid solutions and random vacancy supercells) with the CRYSTAL code, extract useful electronic and vibrational properties (band structure, vibrational DOS, Raman spectra), compare the data obtained with existing experimental data, and critically interpret the results. He/she will correlate all the experimental and simulated data to establish trends in electronic/vibrational properties. If the results of this work prove to be interesting, the trainee will take an active part in writing articles.

Key words: ionic conductors; chemical or structural disorder; ab-initio simulations; comparison with INS and Raman spectra
Level required: 5th year university studies in physics or theoretical chemistry
Notes: This post is an internship with a maximum duration of 5 months
Please send your application directly to the supervisor: Andrea Piovano, email: piovano(at)


Microporous materials have proven to be highly valuable materials for industrial applications such as petrochemistry, catalysis, selective separation and gas storage. In this regard, metal-organic frameworks (MOFs) open up new possibilities for the design of both the geometrical shape and chemical properties of the internal surface, enabling very high pore volumes and surface areas. Moreover, they are in principle able to display novel functionalities, potentially exploitable for a number of applications in catalysis, as sensors, in gas separation, and/or storage.
The synthesis of a Pt-functionalised UiO-67 MOF creates exposed metal species from the PtCl2 functionalisation that are considered to induce enhanced adsorption properties during gas dosing. For this reason, the evolution of the rotational transition of H2 molecules (15 meV) during hydrogen uptake has been investigated by inelastic neutron scattering up to 25 bar pressure.
Simulations of the bare UiO-67 have been performed and the matching with experimental vibrational DOS (density of states) is remarkable, opening the way for a reliable and detailed study of the adsorption of H2 on the different adsorption sites. The calculation of the adsorption energies and geometries will make it possible to assign with consistency the features detected during the INS experiment.

Activities of the trainee:
The trainee will run advanced level simulations (adsorption of molecules on surfaces) with the CRYSTAL code, extract useful electronic and vibrational properties (band structure, vibrational DOS, Raman spectra, adsorption energies), compare the data obtained with existing experimental data, and critically interpret the results. If the results of this work prove to be interesting, the trainee will take an active part in writing articles.

Key words: metal-organic framework; UiO-67; H2 adsorption; ab-initio simulations; comparison with INS spectra
Level required: 5th year university studies in physics or theoretical chemistry
Notes: This post is an internship with a maximum duration of 3 months
Please send your application directly to the supervisor: Andrea Piovano, email: piovano(at)


Over the past 20 years, many of the tremendous advances in the field of soft nanotechnology, from drug delivery to oil extraction, can be ascribed to a combination of two factors: progress in the chemical synthesis of macromolecules and, perhaps more importantly, a better understanding of the structure-function relationship in self-assembled materials. This understanding gives us the power to design self-assembling building blocks and control morphology on the nanometre scale. An interesting example of this is the surfactant AKYPO 45CA (polyoxyethylene lauryl ether carboxylic acid), which is composed of hydrophobic, hydrophilic and ionic components. This structure gives rise to a wide range of spontaneously self-assembled aggregates in solution ranging from large vesicles and thin discs through to smaller ellipsoidal micelles where the geometry depends on the degree of ionisation of the head-group, which can be controlled by adjusting the pH of the solution. During a recent small-angle neutron scattering experiment to investigate the pH dependence of the self-assembled structures, it was observed that the form of the aggregates also depends on the addition rate and concentration of the NaOH used to adjust the pH of the solution. This is a highly surprising result: as the self-assembled structures are dynamic and the exchange kinetics are fast, the presence of more than one final state would indicate a complex free energy landscape with deep local minima. For such an ostensibly simple molecule, this complex behaviour cannot be easily explained with currently available models. The aim of this project is therefore to determine how the preparation conditions affect the self-assembly. This will be done by observing the phase behaviour under various preparation conditions and comparing the behaviour of a commercial surfactant with that of a purified surfactant with a known number of ethylene oxide units. With sufficient data, we will hopefully be able to shed some light on this complex energy landscape.

Activities of the trainee:
The trainee’s activities will be conducted along two lines. The main task will be to explore the parameter space consisting of base concentrations, base addition rates, salt concentrations and temperatures to determine the effect of each parameter on the self-assembly behaviour of the surfactant. This will be done predominantly via turbidity and light scattering measurements with the possibility of small-angle X-ray and neutron scattering, if the opportunity arises. The second parallel line of investigation will be to purify the surfactant via distillation, fractionation or size exclusion chromatography and repeat some self-assembly experiments in order to probe the origins of the observed anomalous behaviour. The trainee will gain experience in solution self-assembly and learn to conduct static and dynamic light scattering (SLS and DLS, respectively) and small-angle scattering experiments. He/she will also learn to analyse and interpret the experimental data, which will then be used to steer the direction of the project.

Level required: 2nd year university studies in chemistry or physical chemistry
Notes: This post is an internship with a maximum duration of 3 months
Please send your application directly to the supervisor: Dominic Hayward, email:  hayward


The intake of dietary fats (lipids) and its effects on health have become a major focus of our modern societies since, over the past few years, changes in both lifestyle and eating habits have resulted in an increase of obesity levels. Consequently, developing solutions that may have beneficial impacts on health is urgently needed. Controlling the digestion of fats is key to addressing this ongoing health crisis but also to controlling the absorption of drugs in oral lipid-based formulations. The overall aim of this broad project is to develop a formulation strategy that slows down and thus reduces lipid absorption.

Bile salts (BS) are biosurfactants produced in the liver and released into the small intestine (duodenum) which play a key role in lipid digestion and absorption. BS facilitate the adsorption of the lipase/co-lipase complex to fat droplet interfaces, thus promoting enzyme-catalysed lipolysis, and they also desorb from the interface and shuttle insoluble lipolysis products to the gut mucosa in mixed micelles, to facilitate their absorption. Therefore, given that BS are a key player in lipolysis, the strategy will consist in using appropriate emulsifiers that compete with BS for adsorption at the water/fat droplet interface and thus slow down lipase adsorption. Our work focuses on a candidate widely used in both the food and pharmaceutical industries: methylcellulose ethers (MC). Although MC have demonstrated potential as dietary fibres (reducing fat absorption), there is still a staggering lack of mechanistic understanding of the competitive interfacial processes leading to lipase inhibition, slower lipid digestion and the associated health benefits.

Activities of the trainee:

The specific project proposed will focus on characterising MC and studying their ability to inhibit BS activity, and thus enzyme activity, both at the interface and in solution. For this purpose, the interfacial properties of MC and their interaction with BS will be investigated at the air/water interface using different interfacial techniques, such as the Langmuir trough, tensiometer, Brewster angle microscope and ellipsometer. These measurements are a first step towards moving onto the more physiologically relevant oil/water interface studies, with the sessile drop method. In parallel, the impact of BS on the self-assembly, thermodynamic and rheological properties of both MC and MC-stabilised emulsions will be assessed using the techniques of dynamic light scattering (DLS), microcalorimetry and rheology. These studies will allow us to improve our understanding of the mechanisms leading to BS inhibition. These preliminary data will be of considerable interest since they will provide a basis for further neutron reflectivity (NR) and small-angle neutron scattering (SANS) experiments.

Key words: methylcellulose ethers; bile salts; interfacial studies; self-assembly, thermodynamic and rheological properties
Level required: 5th year university studies in physical chemistry / formulation
Notes: This post is an internship with a maximum duration of 5 months
Please send your application directly to one of the supervisors: Olivia Pabois, email: pabois(at) 


Electrophysiology is a technique involving the measurement of the flow of ions across a lipid membrane, with the aim of assessing the membrane's permeability or of studying the proteins specifically devoted to the transport of the ions, including at the single molecule scale. This method is particularly challenging and requires special equipment capable of measuring electric current in pico amps. We use the technique on artificial membranes, created at the interface between two droplets surrounded by a lipid monolayer.
Through the use of microfabrication techniques, we would like to improve our experimental setup in order to reduce the volume of reagents required and increase its sensitivity and the quality of the signal recorded.

Activities of the trainee:
After familiarising yourself with the equipment in the laboratory, you will design and produce milli/micro-fluidic devices by 3D printing and PDMS moulding, and then evaluate their efficiency:
 - formation and characterisation of the artificial membrane,
- comparison with the current device, in terms of sample quantity, signal quality and ease of use
- estimation of the limits of the new device: membrane size, possibility of multiplexing, etc.

Key words: microfluids; 3D printing; electrophysiology
Level required: Equivalent of 1st year university studies in a general technical field (covering instrumentation and measurement techniques)
Notes: This post is an internship with a maximum duration of 2 months
Please send your application directly to the supervisor: Anne Martel, email: martela(at)


Low-density lipoproteins (LDL) and high-density lipoproteins (HDL), commonly referred to as “bad” and “good” cholesterol, are biological assemblies of phospholipids and cholesterol, apolipoproteins and triglycerides. Their main role is to transport fat in the extracellular fluid of organisms. The role of HDL and LDL in common diseases is well known, the main distinction between the two being simply their size, i.e. the number of fatty molecules they transport: HDL particles are small (containing around 100 lipids and as many proteins), LDL particles are large (containing up to 1000s of lipids and far fewer proteins), while even larger particles exist. LDL have a low stability and therefore increase the risk of atherosclerosis (artery wall thickening) by deposition, while HDL take away these deposits as a hydrophobic cargo. The stability of these assemblies and therefore the associated risk of cardiovascular disease is, however, poorly understood.
HDL is in fact a microemulsion in soft matter terms (stable at equilibrium), while LDL is an emulsion (unstable at equilibrium). In between, a miniemulsion domain should be present (presenting long-term stability).
Using simple models based on conventional phospholipids for the stabilizing shell, and various triglycerides and cholesteryl esters for the hydrophobic core, we aim to elucidate, in particular by Small-Angle Neutron Scattering (SANS), the lipoproteins (shape, size, size distribution), including the composition and organisation of their shell and core. Phase diagrams where the composition is varied will help us determine the loading thresholds in triglycerides between microemulsion, miniemulsion and emulsion, based on the choice of triglyceride, for a given composition in phospholipids and amount of cholesteryl esters. Finally, the influence of apolipoproteins (decorating the lipoprotein’s outer surface) on the phase diagram will be evaluated by the trainee.

Activities of the trainee:
Bibliography, sample preparation, phase diagrams from visual observations, Differential Scanning Calorimetry (melting of the triglyceride/cholesteryl ester core), Isothermal Titration Calorimetry (for the addition of apolipoprotein), Dynamic and Static Light Scattering (determination of overall dimensions), Zetametry (determination of surface charge), Small-Angle Neutron and X-ray Scattering (structural characterization).

Key words: small-angle neutron scattering; emulsions and microemulsions; high-density lipoproteins and low-density lipoproteins (HDL and LDL); cholesterol esters; model HDL/LDL particles
Level required: 5th year university studies in physical chemistry
Notes: This post is an internship with a maximum duration of 5 months
Please send your application directly to the supervisor: Sylvain Prévost, email:  prevost(at)


By dynamical transition we mean the deviation from linear behaviour of the variation in mean-square displacements of atoms, as a function of temperature. Several experiments have shown the existence of a dynamical transition in hydrated protein systems around 180 – 200 K. This transition reveals an activated change in the conformational states of the protein, as a function of temperature. We have a simple view of the dynamical transition as that of at least two conformational states corresponding to potential wells separated by a potential barrier. As, at low temperatures, the (harmonic) motion of the protein atoms is situated around the minimum of the conformational states of lower energies, the mean-square displacements rise linearly with temperature.  At high temperatures the amplitude of the (anharmonic) motion increases, to the point that it crosses the barrier from low-energy conformational states to those of high energies. The result is a non-linear rise in mean-square displacements. A dynamical transition can therefore be summed up as the transition from harmonic motions to anharmonic motions, following the crossing of a potential barrier.

In practice, if we want to study dynamical transition in incoherent neutron scattering experiments, for example, we would classically use the mean-square displacement of the (hydrogen) atoms, obtained from the slope at the origin, as a function of Q2 of the factor or function of the dynamical structure of the incoherent quasi-elastic (? ? 0) scattering of neutrons. The mean-square displacements obtained depend neither on Q nor time, and we therefore consider the protein system as an ensemble in equilibrium averaged over all spatial scales.

The aim of the internship is to study the dynamical transition as a function of Q and of time, to gain a better understanding of how the dynamical transition evolves within a protein. This will require investigating the feasibility of using the multivariate statistical techniques of principal component analysis (PCA) to analyse the dynamical structure function (or mean-square displacements) on the Q and time scales together. These are new techniques in this domain but are certainly promising. They have recently been used at the ILL in a Swedish-ILL collaboration to study the dynamics of an enzyme with and without inhibitor.

Activities of the trainee:
1 – Use the Bicout-Zaccai dynamical transition model to develop the PCA methodology;
2 – Apply the methodology to analyse the neutron scattering experimental data obtained for proteins by J. Peters (ILL).

Key words: incoherent neutron scattering; dynamical transition; PCA
Level required: 4th year university studies in physics
Notes: This post is an internship with a maximum duration of 5 months.
Please send your application directly to the supervisor: Dominique Bicout, email: bicout(at)