BESSY II
PEAXIS (Combined RIXS and XPS) - U41-PEAXIS Beamline

U41-PEAXIS Beamline - Combined RIXS and XPS

U41-PEAXIS beamline is one of the highest flux beamlines at BESSY II. It provides highly focused soft X-rays, thanks to the ellipsoidal refocusing mirror. The beamline is connected to a fixed endstation PEAXIS that is dedicated to studies of angle-resolved RIXS (Resonant Inelastic X-ray Scattering) and PES (PhotoElectron Spectroscopy) on solids and liquids that are sealed in a fluid micro-cell.

Beamline layout

Beamline layout

Photon flux at the exit slit. The flux at the sample position is roughly half of it.

Photon flux at the exit slit. The flux at the sample position is roughly half of it.

Beamline resolution @ 401 eV

Beamline resolution @ 401 eV

Beamline resolution @ 867 eV

Beamline resolution @ 867 eV

Focal spot @ 400 eV and slit 20 µm

Focal spot @ 400 eV and slit 20 µm

 

PEAXIS Station - Combined RIXS and XPS

The station PEAXIS (PhotoElectron Analysis and X-ray Inelastic Spectroscopy) is a fixed experimental station installed at the U41-PEAXIS beamline, in user operation since October 2018. It is dedicated to studies of angle-resolved RIXS (Resonant Inelastic X-ray Scattering) and PES (PhotoElectron Spectroscopy) on solids and liquid cells. As shown in the Schematic figure below, the station is equipped with an electron energy analyzer (violet) and a RIXS spectrometer (blue). Various sample manipulators (red) can be installed in the sample chamber (green) according to different sample environments. The RIXS spectrometer includes a grating chamber (dark blue), a five-meter RIXS arm (light blue) and a CCD detector (orange). The RIXS arm is continuously rotatable on a supporting rail in a range of 106.5 degrees.

 

Schematic of the PEAXIS station

Schematic of the PEAXIS station

Photo of the PEAXIS station

Photo of the PEAXIS station

RIXS spectra of liquid acetone vibrations detected at the excitation energy of 531 eV and various θ angles. The intense peaks at the channel 1000 come from the elastic scattering, and the rest, equally-spaced peaks represent the vibrational excited final states in the electronic ground state. The RIXS resolution (combined with the beamline) at 531 eV is about 60 meV.

RIXS spectra of liquid acetone vibrations detected at the excitation energy of 531 eV and various θ angles. The intense peaks at the channel 1000 come from the elastic scattering, and the rest, equally-spaced peaks represent the vibrational excited final states in the electronic ground state. The RIXS resolution (combined with the beamline) at 531 eV is about 60 meV.

Beamline Energy Resolution
40 [meV] @ 400 [eV]
Beamline Resolving Power
10000 [deltaE/E] @ 400 [eV]
Beamline Energy Range
180 - 1600 [eV]
Max Flux On Sample
4 * 1012 [ph/s] @ 200 [eV]
contacts
Dr. Deniz Wong
Dr. Maciej Bartkowiak
Dr. Christian Schulz
Techniques
Absorption
  • EXAFS
  • NEXAFS
Photoelectron emission
  • Angular Resolved PES
  • XPS
Scattering
  • Inelastic scattering
control/Data analysis
Control Software Type
  • tbc
Data Output Type
  • tbc
Data Output Format
  • tbc
in partnership with