The high-resolution diffraction beamline P08 at PETRA III

Abstract

The new third-generation synchrotron radiation source PETRA III located at the Deutsches Elektronen-Synchrotron DESY in Hamburg, Germany, has been operational since the second half of 2009. PETRA III is designed to deliver hard X-ray beams with very high brilliance. As one of the first beamlines of PETRA III the high-resolution diffraction beamline P08 is fully operational. P08 is specialized in X-ray scattering and diffraction experiments on solids and liquids where extreme high resolution in reciprocal space is required. The resolving power results in the high-quality PETRA III beam and unique optical elements such as a large-offset monochromator and beryllium lens changers. A highprecision six-circle diffractometer for solid samples and a specially designed liquid diffractometer are installed in the experimental hutch. Regular users have been accepted since summer 2010.

Modifying magnetic properties of ultra-thin magnetite films by growth on Fe pre-covered MgO(001)

“…P08 is an undulator beamline with a high heat-load double-crystal monochromator and largeoffset monochromator to separate the beamline from the adjacent beamline. 29 A Kohzu 4S þ 2D type diffractometer is installed at the endstation. The diffracted signal was measured by a Mythen strip detector.…”

X-ray Reflectometry and Related Surface Near X-ray Scattering Methods

“…This fully reversible process can be investigated by measuring the electron density profile perpendicular to the mercury-electrolyte interface using X-ray reflectivity measurements, the in-plane structure by grazing incidence diffraction. The presented data has been recorded at the high resolution diffraction beamline P08 [24] which is situated at the 3rd generation synchrotron radiation source PETRA III in Hamburg, Germany [13] Figure 8 presents the X-ray reflectivity measurements, the refinements and the results. It shows, that during Pb amalgamation at −0.9 V the reflectivity and therefore the interface structure is identical to that of the reference: a Pb 2+ -free electrolyte on mercury.…”

“…Subject of this investigation is the strain distribution of the inverted quantum huts. To exactly determine the strain, CTR and GID measurements have been conducted at beamline P08 at PETRA III [24] using the contrast variation method as introduced in the theory part about the atomic form factor. Accordingly, X-ray measurements have been done at two different wavelengths 1 = 1.1227 Å and 1 = 1.1167 Å where the latter corresponds the the germanium K absorption edge.…”

Anomalous x-ray scattering study of the growth of inverted quantum hut structures in a Si-Ge superlattice emitting strong photoluminescence

“…In our study we have carried out measurements at the Ge K edge (11 103 eV) and away from it (11 043 eV) to determine shape, composition, and strain of Ge IQH structures embedded in a Si-Ge superlattice [19][20][21]. X-ray measurements were performed both at beamline [22] P08 of the synchrotron radiation source PETRA III, DESY, Germany and at the Indian beamline [23] BL-18B, Photon Factory, KEK, Japan. The monochromatic beam in BL-18B at Photon Factory was collimated with a set of beam defining slits having horizontal opening of 1 and 0.1 mm in the vertical direction and data collection was done by a Cyberstar scintillation detector.…”