MLZ User Meeting & German Neutron Scattering Conference 2020

Session

MLZ Users 2020 - Neutron Methods

UM-NM

8 Dec 2020, 13:00

Online event

Conveners

MLZ Users 2020 - Neutron Methods: Part 1/3

• Peter Link
• Sebastian Busch (GEMS at MLZ, HZG)

MLZ Users 2020 - Neutron Methods: Part 2/3

• Sebastian Busch (GEMS at MLZ, HZG)
• Peter Link

MLZ Users 2020 - Neutron Methods: Part 3/3

• Peter Link
• Sebastian Busch (GEMS at MLZ, HZG)

220. (Elastic) neutron scattering on hydrogen rich samples

Olaf Soltwedel

08/12/2020, 16:15

UM: Neutron Methods

Talk

(Elastic) neutron scattering on hydrogen rich samples

Estimating the resolution of instruments equals predicting their capabilities. Of course, those estimates are only that good as the assumed simplifications are justified. One of the most significant assumption for SANS or NR is, that they are solely elastic. In this context, the interaction of neutrons with hydrogen rich samples is of...

235. Chlorine determination in archaeological iron artefacts by PGAA

Dr Friedrich Wagner (Physik-Department, Technische Universität München)

08/12/2020, 14:05

UM: Neutron Methods

Talk

Archaeological iron finds often undergo a secondary destructive corrosion process after excavation. Since chlorine is supposed to play a major role in this process, it is important to have a method for determining the chlorine content of such objects non-destructively, both for assessing the danger of corrosion and to verify the efficiency of methods trying to remove the chlorine. Neutron...

156. Compact Clamp Cells for High Pressure Neutron Scattering at Low Temperatures and High Magnetic Fields at MLZ

Mr Andreas Eich (Forschungszentrum Jülich GmbH; RWTH Aachen)

08/12/2020, 15:50

UM: Neutron Methods

Talk

The combination of high pressure, low temperature and high magnetic fields with neutron scattering is of great interest for the study of a wide range of materials, e.g. quantum phenomena where competing magnetic interactions are tuned by pressure. The basic requirement for such experiments is the availability of suitable pressure devices. The most common type of device for high-pressure...

111. Effect of Si content within Silicon-Graphite anodes on performance and Li concentration profiles using NDP and conventional electrochemical techniques

Mr Erfan Moyassari Sardehaei (Institute for Electrical Energy Storage Technology (EES), Technical University of Munich (TUM))

08/12/2020, 15:00

UM: Neutron Methods

Talk

Although addition of silicon to a conventional pure graphite anode leads to a large increase in energy densities, profound morphological changes associated with it, due to repeated (de-)lithiation, may lead to rapid degradation in cell performance. A reversible (de-)lithiation of Li-ions and the formation of a homogenous SEI layer in the initial cycles is therefore crucial.
In this work, we...

56. Imaging with fast neutrons - improvements in spatial resolution and quantification

Dr Eberhard Lehmann (PSI)

08/12/2020, 13:00

UM: Neutron Methods

Invited talk

Fast neutron imaging is a technique to investigate large objects where X-rays or thermal neutrons face limitations due to their comparatively low penetration capabilities. Compared to thermal neutrons, where thin scintillators (< 100um) generally provide good detection efficiencies (>> 1%) at high spatial resolutions in the 10th of microns range, fast neutrons currently require mm-thick...

104. MIASANS at the longitudinal resonant spin echo spectrometer RESEDA

Jonathan Leiner (Technical University of Munich)

08/12/2020, 17:10

UM: Neutron Methods

Talk

The RESEDA (Resonant Spin-Echo for Diverse Applications) instrument has been optimized for the measurement of quasi-elastic and inelastic processes over a wide parameter range. One spectrometer arm of RESEDA is configured for the MIEZE (Modulation of Intensity with Zero Effort) technique where two precisely tuned radio-frequency (RF) flippers prepare the neutron beam such that it yields a...

166. MIEZEFOC

Christoph Herb (TUM)

08/12/2020, 17:35

UM: Neutron Methods

Talk

Neutrons are ideal probes to study static and dynamic properties of magnetic materials and materials containing heavy and light elements. With the increasing interest in studying slow processes at large spatial scales for example i) in diffusion processes in soft matter samples and ii) the spin dynamics near quantum and thermal phase transitions it is important to develop instrumentation with...

187. Multimodal Imaging using Neutrons and Gammas at the NECTAR Instrument

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

08/12/2020, 13:40

UM: Neutron Methods

Talk

NECTAR is a unique beam-line with access to fission neutrons for non-destructive inspection of large and dense objects, where thermal neutrons or X-rays face limitations due to their comparatively low penetration. With the production of fission neutrons at the instrument, as well as neutrons interacting with beamline geometry, such as the collimator, gamma rays are inevitably produced in the...

245. The Robot Positioning System at the Materials Science Diffractometer STRESS-SPEC

Martin Landesberger (TUM)

08/12/2020, 15:25

UM: Neutron Methods

Talk

The diffractometer STRESS-SPEC is optimised for fast strain mapping and pole figure measurements. Our group was the first to pioneer the usage of industrial robots for sample handling at neutron diffractometers. However, the current robot is limited in its use due to insufficient absolute positioning accuracy of up to ± 0.5 mm. Usually, an absolute positioning accuracy of 10% of the smallest...