i2ns

Session

Poster session

19 Oct 2021, 17:30

14. Inelastic Neutron Scattering Measurements of ClathrateHydrates for the HighNESS Project

Valentin CZAMLER (ILL | NPP)

19/10/2021, 17:30

Clathrate hydrates are are crystalline water-based solids (similar to ice), which form cages that are able to host guest molecules. The guests are trapped in cavities of the hosts, that are composed of hydrogen-bonded water molecules. Tetrahydrofuran (THF) clathrate hydrates (fully or partially deuterated) seem particularly well suited as a moderation medium for neutron, as they possess...

8. From one- to two-magnon excitations in the S = 3/2 magnet β-CaCr2O4

Manila Songvilay (Institut Néel, CNRS & Univ. Grenoble Alpes)

19/10/2021, 17:40

Decades of theoretical, numerical and experimental studies have sought quantum systems, beyond the classical picture of conventional magnetism, focusing on low-dimensional S = 1/2 materials. The characteristic features of such systems are the lack of long-range magnetic order and the presence of deconfined fractional spin-1/2 excitations called spinons. Owing of the exact solution of the spin-...

29. Using Generative Adversarial Networks to match experimental and simulated inelastic neutron scattering data

Andy Sode Anker

19/10/2021, 17:50

During the past decades, research in materials science has been accelerated by the rapid development of synchrotron and neutron sources.1 Conventional data analysis approaches using minimization techniques, such as least-squares fitting algorithms, cannot keep up with the amount of increasing size of measured datasets. Consequently, data analysis is becoming a bottleneck for research in...

11. ALSA – Automatic Laue Sample Aligner

Dr Petr Čermák (MGML, Charles University)

19/10/2021, 18:00

Each of you will be familiar with the well-known chart of the dependence of the flux of large synchrotron and neutron infrastructures on time. While synchrotron power continues to increase by orders of magnitude, neutrons reached their highest power 50 years ago at ILL and it will be slightly surpassed with the help of ESS. Therefore, scientists have been trying for decades to optimize optics,...

10. MIEZE - Neutron spin-echo optimized for magnetic materials

Johanna JOCHUM

19/10/2021, 18:10

Highest resolution in classic TAS and TOF techniques always comes at the price of decreased flux. This challenge has been tackled by the development of neutron spin-echo, where the resolution is completely decoupled from the wavelength spread of the instrument. Conventional neutron spin echo reaches an energy resolution down to < 1 neV. However, classical NSE is limited in the range of high...

12. Panther - a new single-crystal thermal-neutron time-of-flight spectrometer

Dr Björn Fåk (Institut Laue-Langevin)

19/10/2021, 18:20

Panther is a new thermal-neutron direct-geometry hybrid time-of-flight spectrometer at the Institut Laue-Langevin. Phase-1 of the project is completed, and the design and performance of the instrument will be discussed. Panther is equipped with two double focusing monochromators: a pyrolytic graphite for which the (002), (004), and (006) reflections are routinely used, and a copper...

13. Geometry and resolution calculations of the new INS spectrometer at FLNP JINR

Mrs M.K. Klepacka (AMU Poznan / FLNP JINR)

19/10/2021, 18:30

The inverse-geometry inelastic neutron spectrometer NERA has already been operating for more than three decades and during that time has proven to be a very successful machine for broadband chemical spectroscopy with neutrons. To continue the research using the best modern technologies, the project of a new inverse-geometry inelastic neutron spectrometer has been started. New instrument will...

7. Exploiting symmetry with brille

Gregory TUCKER (European Spallation Source)

19/10/2021, 18:40

Modern time-of-flight neutron spectrometers routinely collect datasets covering volumetric reciprocal space. By taking advantage of multiplexing techniques or parametric studies datasets can exceed one billion independent observations. Software exists to facilitate collecting observations from volumetric datasets in arbitrary, user-defined, regions of reciprocal space; which can often be...

26. From IN8 to THERMES – a thermal three-axis spectrometer commissioned at ILL

The three-axis spectrometer IN8 offers to ILL users advanced conditions for studies of thermal excitations in single crystals and liquids. The instrument performance and flexibility are ensured by the use of large double-focusing monochromators and analysers providing high counting rate even for small and low-scattering samples. The new monochromator unit has been recently commissioned. The...

15. Role of correlated disorder on lattice dynamics in negative thermal expansion material, Cadmium Cyanide.

Johnathan Bulled (Inorganic Chemistry Laboratory, Oxford University)

Cubic cadmium(II) cyanide is amongst the most important isotropic negative thermal expansion (NTE) materials, with behavior more than twice as extreme as that of better known systems such as ZrW$_2$O$_8$. We investigate the relationship between the geometrically frustrated orientational order of the molecular CN$^-$ anion the system’s lattice dynamics. Inelastic neutron scattering (INS) is...

18. Using Generative Adversarial Networks to match experimental and simulated inelastic neutron scattering data

Mr Andy Sode Anker (Department of Chemistry, University of Copenhagen, 2100 Copenhagen Ø, Denmark)

During the past decades, research in materials science has been accelerated by the rapid development of synchrotron and neutron sources.1 Conventional data analysis approaches using minimization techniques, such as least-squares fitting algorithms, cannot keep up with the amount of increasing size of measured datasets. Consequently, data analysis is becoming a bottleneck for research in...