LLB / MLZ Workshop 2024 in Herrsching

May 27, 2024, 9:00 AM → May 28, 2024, 2:45 PM Europe/Berlin

Seminar room 3 (1st floor, north building) (Haus der bayerischen Landwirtschaft)

Michael Schulz

On May 27 – 28, 2024 scientists from the Laboratoire Léon Brillouin (LLB) and the Heinz Maier-Leibnitz Zentrum (MLZ) will meet at the “Haus der bayerischen Landwirtschaft“ located in Herrsching at the Ammersee Lake near Munich. The meeting follows the tradition of several regular workshops in the past years which already fostered the bonds between French and German neutron scientists.

The LLB is supported jointly by the Commissariat à l'Energie Atomique (CEA) and the Centre National de la Recherche Scientifique (CNRS). Its aim is to carry out research on the structure and dynamics of condensed matter using neutrons at various facilities. It is situated in the CEA/Saclay research centre.

The MLZ represents the cooperation between the Technische Universität München (TUM) and two research centres of the Helmholtz Association, namely Forschungszentrum Jülich and Helmholtz-Zentrum Hereon (former HZG) to exploit the scientific use of the Forschungs-Neutronenquelle Heinz Maier-Leibnitz in Garching near Munich. 

The 2024 workshop in Herrsching will discuss opportunities of an enhanced cooperation between French and German neutron scientists covering topics from instrumentation to the various fields and applications of neutron science. Besides providing mutual insights from both research centers the objective of the meeting is to identify potential joint projects.

The directors of LLB and MLZ are looking forward to your participation!        

                       

On behalf of LLB                       On behalf of MLZ                            

Arnaud Desmedt                       Christian Pfleiderer
Grégory Chaboussant               Martin Müller
                                                      Stephan Förster           

 

Monday, May 27

Presentations: Introduction

Convener: GREGORY CHABOUSSANT (LLB (CNRS-CEA))

1 MLZ Introduction

Speaker: Christian Pfleiderer (TUM FRM II)

2 LLB Introduction

Speaker: Arnaud DESMEDT (CNRS - ISM Univ. Bordeaux)

3 Presentation of the IRP: past, present, future

Speaker: GREGORY CHABOUSSANT (LLB (CNRS-CEA))

Presentations: Imaging

4 New Perspectives for Neutron Imaging and Diffraction through Advanced Event-Mode Data Acquisition

Recently developed event-driven detectors are capable of registering spots of light induced by neutron interactions in scintillators. Reconstructing the center-of-mass of the individual interactions, it is possible to significantly enhance the spatiotemporal resolution of recorded radiographs. Utilizing this principle, we present a novel detector concept capable of Time-of-Flight imaging with adjustable field-of-view including n/g discrimination via analysis of the event shape in space and time.

Speaker: Adrian Losko (Technische Universität München, Forschungs-Neutronenquelle MLZ (FRMII))

5 Neutron Imaging of Ammonia Carriers for Energy Storage

Ammonia is among the largest produced chemicals in the world and finds significant application as a fertilizer. It is also seen as an alternative for high density hydrogen storage. Chemicals that absorb ammonia are seen as promising options for energy storage.
In this talk manganese chloride–silica gel composite and additively manufactured Strontium cloride-Na Bentonite ammonia sorbent materials studied using in situ neutron radiography and neutron CT will be discussed.

Speaker: Richi Kumar

6 SAPHiR: Neutron diffraction and radiography under extreme pressure and temperature conditions

The new instrument SAPHiR is dedicated to time-of-flight neutron diffraction and radiography of powder samples, fluids, and melts at pressures up to 15 GPa and temperatures between 86–2300 K. Future applications include in-situ crystallography and phase relations of light-element-bearing phases, equations of state, reaction kinetics, and radiography for the Earth and materials sciences. Currently, SAPHiR is used offline for conducting deformation experiments to investigate planetary formation.

Speaker: Nicolas Walte

10:35 AM Coffee

Presentations: QENS

7 Hydrogen mobility in an amide-based hydrogen storage system

The hydrogen storage performance of a reactive hydride composite, Mg(NH$_2$)$_2$ + 2LiH, can be significantly improved by the addition of Li(BH$_4$) and the subsequent formation of an amide–borohydride compound Li$_4$(BH$_4$)(NH$_2$)$_3$ during hydrogen release. This improvement has been attributed to the enhanced hydrogen mobility in the latter compound, due to which the reaction becomes diffusion-controlled. We studied the hydrogen mobility in this system by neutron scattering.

Speaker: Dr Sebastian Busch (GEMS at MLZ, Helmholtz-Zentrum Hereon, Germany)

12:15 PM Lunch & Free Time

Presentations: SANS

8 Tracking the solution structures of membrane proteins by scattering and modeling

SAXS and SANS combined with modeling have proved to be essential techniques in structural biology when the classical high-resolution methods are not appropriate. The “contrast matching” method in SANS is particularly suitable to specifically probe membrane proteins by contrast-matching their amphiphilic environment. I will illustrate this feature with TSPO translocator protein, a ubiquitous and functionally important membrane protein used as a pharmacological marker in neuroimaging.

Speaker: Sophie Combet (LLB)

9 KWS-X: A Powerfull SAXS/WAXS Beamline at MLZ

The customized SAXS/WAXS instrument commenced user operation in April 2023. As a young member of our small-angle scattering instrument family, which utilizes X-rays as the primary beam, the new instrument is equipped with a high-flux Metal-Jet source and a movable Eiger 2R 4M SAXS detector. Additionally, it features a 4-axis motorized WAXS detector and a Bonse-Hart USAXS, enabling a wide range of scattering vector q, covering values from 0.0002 to 7 Å⁻¹.

Speaker: Dr Baohu Wu (JCNS-MLZ, FZ Juelich)

10 SAM (Small-Angle Modular) the new Small-Angle instrument at the Institut Laue Langevin

SAM, a medium size small-angle neutron scattering (SANS) instrument developed by the Laboratoire Léon Brillouin and the Institut Laue Langevin (ILL), is part of the ILL "Endurance II" rejuvenation programme. This SANS instrument with a polarised beam option will be also equipped with a “MIEZE” option, for high-resolution spectroscopy with sub-μeV resolution. Following current friendly user experiments, the beam time will be divided equally between ILL and French community user programmes.

Speaker: Dr Annie BRULET (Laboratoire Léon Brillouin)

3:35 PM Coffee

Presentations: Neutron Diffraction

11 Temperature dependent crystal structure of Ethylene Carbonate

Neutron and synchrotron radiation diffraction studies are often conducted to investigate the structure of batteries and their components. While most of the research in this field has focused on the electrode materials, there have been fewer studies on the electrolytes that mediate charge transfer. This work presents a systematic approach to determining the structure of ethylene carbonate, which is a solvent commonly used in the liquid electrolytes of state-of-the-art Li-ion batteries.

Speaker: Lea Westphal (TUM/MLZ)

12 Robotics – Application for Stress Analysis using Neutron Diffraction

The original robot setup at the neutron diffractometer STRESS-SPEC has been upgraded to a high accuracy positioning/metrology system. I will give a short introduction on the complete measurement process chain for the new robot environment. To achieve a spatial accuracy of 50 µm or better during measurement of the strain tensor, the sample position is tracked by a camera system and actively corrected. A brief overview of additional sample environment for the robot will also be given.

Speaker: Michael Hofmann

13 High-efficiency diffractometer ERWIN

The instrument ERWIN, currently being assembled at MLZ, is a high-efficiency powder diffractometer designed for rapid data collection, time-resolved measurements, parametric studies and investigations on small samples.This contribution will provide an overview on applications, specifications and the current status of the instrument.

Speaker: Markus Hoelzel

14 Presentation of 2FDN

Speaker: Marie Plazanet (LIPhy)

6:45 PM Scenic Walk to Dinner Location

7:15 PM Dinner

Tuesday, May 28

Presentations: Food Science

15 Sustainable Food Colloids

Food colloids are part of everyone’s life: milk, yogurt or cheese. Socio-economical trends demand for more sustainable, plant-based food formulations, but represent a scientific challenge. Colloidal systems have been studied, but not fully understood. Xray and neutron scattering techniques deliver the nanoscale mechanisms. We commenced with traditional food colloids stabilized by beta lactoglobulin and phospholipids studied by SANS and NSE. These findings are linked to the viscoelastic behavior.

Speaker: Henrich Frielinghaus (JCNS)

16 Perspectives on Fractal dimensions: Rheology and Neutron scattering studies on Dairy gels

The Fractal dimension (Df) is a key structural parameter of the networks formed by several food systems. In the present work, dairy gels from skim milk at different concentrations are formed via two different mechanisms: acidification, and enzymic (rennet)-induction. Oscillatory rheology, and ultra-small-angle neutron scattering (USANS) studies are performed to characterize their structural evolution. The perspectives on Df thus obtained will be discussed to understand the inherent physics.

Speaker: Dr Ramya Koduvayur Ananthanarayanan (GNeuS research fellow, TUM Garching)

Presentations: HiCANS

17 The ICONE project: towards a new French neutron scattering facility.

The Laboratoire Léon Brillouin is developing the technologies necessary to build a new type of neutron source using low energy proton accelerators: High Current Compact Accelerator driven neutron sources (HiCANS).
The long-term goal is to eventually build a new user facility, ICONE, which would offer a suite of 10 neutron scattering instruments to the French community. We aim at achieving performances comparable to the instruments which were operated around the Orphée reactor.

Speaker: Dr Frédéric OTT (Laboratoire Léon Brillouin CEA/CNRS, Univ. Paris Saclay)

18 The HBS neutron source project and the associated instrumentation

The HBS („High Brilliance neutron Source”) is an ambitious HiCANS project being developed by the Jülich Centre for Neutron Science (JCNS). The technical design report [1] for the facility has been published in 2023 featuring the accelerator (protons, 70 MeV, 100 mA), three individual target-moderator-reflector stations and the associated instrumentation, which will allow scientific applications on the level of today’s well-established research reactor neutron sources.
In addition to ...

Speakers: Klaus Lieutenant (FZJ), Ulrich Rücker (JCNS, Forschungszentrum Jülich)

10:50 AM Coffee

Presentations: ESS Instruments

19 Capabilities, applications and status update of ODIN, the imaging instrument at ESS

ODIN is ESS state-of-the-art multipurpose Neutron Imaging Instrument, designed and being built by TUM and PSI. Using wavelength-resolved imaging with tuneable medium to high wavelength resolution, will provide significantly increased chemical and structural sensitivity compared to other neutron imaging instruments, with fixed (or absent) wavelength resolutions. We present some of the design highlights, instrument capabilities, possible applications and the present status of the installation.

Speaker: Aureliano Tartaglione (Technische Universität München, MLZ (FRM2))

20 CSPEC - the cold chopper spectrometer for the ESS

The cold chopper spectometer CSPEC at the ESS is a joint project from the Technische Universität München (TUM), Germany, and the Laboratoire Léon Brillouin (LLB), Saclay, France. CSPEC will benefit from the high brilliance of the ESS spallation in addition to the cumulative flux provided by repetition rate multiplication (RRM) that results in large flux gains. CSPEC is in the construction phase phase and the current status abd expected performance will be presented.

Speaker: Wiebke Lohstroh

1:00 PM Lunch (optional) or Lunch box to take away

21 Final Discussion & Conclusive Remarks

Speakers: Arnaud DESMEDT (CNRS - ISM Univ. Bordeaux), Christian Pfleiderer (TUM FRM II)