In PTB’s laboratory at BESSY II, we have set up a new beamline at a bending magnet. It provides monochromatized radiation in the tender X-rays range from 1.5 keV to 10 keV focused typically to a 20 µm x 20 µm spot.
A new concept has been developed and implemented for the monochromator. It consists of a plane grating monochromator (PGM) with a multilayer-coated blazed grating and plane mirror...
Fourth-generation synchrotron storage rings mark a significant advancement in synchrotron technology, providing exceptionally bright and precisely focused X-ray beams crucial for diverse scientific pursuits. Yet, their tightly configured magnetic lattices historically presented obstacles for accessing lower-energy radiation, like infrared (IR) and THz. Here, we unveil the inaugural IR beamline...
Angle-Resolved Photoemission Spectroscopy (ARPES) is the premier tool to determine a quantum
material’s momentum-dependent electronic states and their energy and lifetime renormalization due to many-body interactions. Nanoscale ARPES (nanoARPES) has recently greatly expanded the practical reach of ARPES to submicron samples. The MAESTRO nanoARPES instrument at the ALS has achieves ~100 nm...
State-of-the-art soft X-ray beamlines use collimated plan-grating monochromators (cPGM) [1] as monochromatizing devices. Multi-Layer (ML) coated plane gratings and mirrors allow to extend the available photon energy range of cPGM’s towards the so-called tender X-ray photon energy range (up to 5 keV) providing a significantly higher photon flux [2]. This X-ray energy regime covers L- and...
Modern soft x-ray spectroscopies such as resonant inelastic x-ray scattering require stable x-rays with high energy resolution. To realize such a grating monochromator, the state-of-the-art optics have to be installed without any distortion on precise scanning stages in ultra-high vacuum. Their attitude must be precisely aligned by the beam. Instability of photon energy due to vibration and...
Resonant inelastic x-ray scattering (RIXS) [1] is a momentum resolved x-ray spectroscopy technique that requires high energy resolution around specific atomic absorption edges. This usually means the L2,3-edges of the transition metals (3d, 4d, and 5d TMs) and a resolution on the order of ΔE~50 meV, making it possible to measure spin-waves and atomic multiplets in d-electron systems. However,...
During the last 5 years the RIXS instrumentation at the ESRF soft X-ray beamline ID32 has undergone a major upgrade which greatly improved the resolution and the through-put of the instrument compared to its first period of operation from summer 2015 to the ESRF-EBS shutdown. This upgrade included the replacement of refocusing optics, spectrometer gratings and also the installation of new...
