Abstract
An overview of the high magnetic field facility for neutron scattering at Helmholtz Zentrum Berlin (HZB) is given. The facility enables elastic and inelastic neutron scattering experiments in continuous magnetic fields up to 26.3 T combined with temperatures down to 0.6 K.
Highlights
HFM/EXED – the high magnetic eld facility for neutron scattering Figure 1 - consists of two main components: the High Field Magnet System (HFM) and the Extreme Environment Di ractometer (EXED) (Lieutenant et al, 2006; Peters et al, 2006; Prokhnenko et al, 2015; Smeibidl et al, 2010)
The HFM is a " rst of its kind" hybrid system which is capable of reaching magnetic elds up to 26.3 T, making it by far the strongest continuous eld available for neutron scattering experiments worldwide (Smeibidl et al, 2016)
The superconducting coil is a 13-Tesla, 500-mm cold bore coil consisting of Nb3Sn cable-in-conduit conductor (CICC) and weights 5 tons (6 tons full cold mass including anges, joints and piping) (Bonito Oliva et al, 2008; Dixon et al, 2009, 2010)
Summary
HFM/EXED – the high magnetic eld facility for neutron scattering Figure 1 - consists of two main components: the High Field Magnet System (HFM) and the Extreme Environment Di ractometer (EXED) (Lieutenant et al, 2006; Peters et al, 2006; Prokhnenko et al, 2015; Smeibidl et al, 2010). It extends the low Q-range beyond 10−2 Å−1 using a 6 m-long pin-hole collimation combined with sample-detector distance of 6 m The latter enables studies of matter on mesoscales in high magnetic elds such as e.g. vortex state in type-two superconductors. The upgrade includes an evacuated detector chamber for forward scattering with a built-in 3He detector array covering 30° in- and out- of plane and positioned 4.5 m away from the sample, a new focusing guide section that accommodates a monochromating chopper assembly and an inelastic doppler system which is at 2.5 m distance from the sample, the upgraded EXED will enable energy-resolved measurements over a limited Q-range < 3.25/λ (Å−1) and energy range < 25 meV in addition to the existing elastic capabilities
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