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10–11 Dec 2019
Marriott
Europe/Berlin timezone

Neutron scattering in high magnetic fields using HFM/EXED facility at HZB

10 Dec 2019, 15:00
45m
Marriott Conference room - Munich (Marriott)

Marriott Conference room - Munich

Marriott

Berliner Str. 93 80805 München Germany
300
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Invited talk Neutron Methods Neutron Methods

Speaker

Oleksandr Prokhnenko (HZB)

Description

The application of high magnetic fields is a powerful method for revealing the complex behavior in modern materials. In combination with microscopic probe such as neutrons it provides a direct access to static and dynamic correlations in matter. Helmholtz-Zentrum Berlin (HZB) hosts a unique high field facility for neutron scattering. The facility combines neutron scattering with continuous magnetic fields as high as 26 T and temperatures down to 0.1 K. Magnetic field is generated by means of horizontal solenoid High Field Magnet (HFM). The magnet utilizes hybrid technology and reaches 26 T at full power of 4 MW. The tapered inner coil allows neutron-scattering to detectors up to $\pm$15$^\circ$ off the beam axis. Neutron scattering in high fields is performed using the dedicated multi-purpose Extreme Environment Diffractometer (EXED). EXED uses time-of-flight (TOF) polychromatic technique. Combined with 15$^\circ$ magnet rotation it provides a gapless coverage of Q-range from 0.1 up to 12 Å$^{-1}$ for diffraction experiments. The low-Q range can be extended beyond 10$^{-2}$ Å$^{-1}$ using a pin-hole TOF Small Angle Scattering mode. A direct TOF spectrometer mode enables inelastic neutron scattering experiments over a limited Q-range < 1.8 Å$^{-1}$ with an energy resolution of a few percent and incident energies below 25 meV. I this talk I will give an overview of the HFM/EXED facility with main focus on science which has been done using it in the last years.

Primary author

Oleksandr Prokhnenko (HZB)

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