Gamma-ray spectra and absorbed doses measured at EuXFEL undulator system.

Characterization of the stray radiation field present in the undulator systems at the European XFEL GmbH (EuXFEL) is of great importance, as the potential damage to undulator permanent magnets, electronics and diagnostic equipment depends both on the type of particles and the energy. This work presents the energy profile of the stray radiation measured in the upstream and downstream part of the undulator system near the beam pipe. The influence of machine operation settings on the radiation field intensity was also investigated.

Band-selective gap opening by a -symmetric order in a proximity-coupled heterostructure SrVOFeAs.

Complex electronic phases in strongly correlated electron systems are manifested by broken symmetries in the low-energy electronic states. Some mysterious phases, however, exhibit intriguing energy gap opening without an apparent signature of symmetry breaking (e.g.

Nuclear magnetic resonance apparatus for pulsed high magnetic fields.

A nuclear magnetic resonance apparatus for experiments in pulsed high magnetic fields is described. The magnetic field pulses created together with various magnet coils determine the requirements such an apparatus has to fulfill to be operated successfully in pulsed fields. Independent of the chosen coil it is desirable to operate the entire experiment at the highest possible bandwidth such that a correspondingly large temporal fraction of the magnetic field pulse can be used to probe a given sample.

NMR signal averaging in 62T pulsed fields.

Nuclear Magnetic Resonance (NMR) experiments in pulsed high magnetic fields up to 62T at the Dresden High Magnetic Field Laboratory (Hochfeld-Magnetlabor Dresden) are reported. The time dependence of the magnetic field is investigated by observing various free induction decays (FIDs) in the vicinity of the maximum of the field pulse. By analyzing each FID's phase and its evolution with time the magnetic field's time dependence can be determined with high precision.