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Project Aquarius U49/2 PGM-2

The Aquarius project will provide a BESSY II soft x-ray beamline and user infrastructure at the segment H15 (high-β section), including chemistry laboratory and laser hutch. The scientific requirements to the beamline are as follows:

  1. Focal spot size of 5 µm vertical and 25 µm horizontal
  2. Photon flux: >1012 photon/s at 400 eV with the above-specified focal size
  3. Resolving power: >10.000 at 300 eV
  4. Photon energy from 100 to 1.200 eV

Fokus at experiment

The highly focused and intensive photon beam in soft x-ray range, benefits RIXS and PES studies on diluted liquid samples. The future BESSY-VSR will further benefit the time-resolved laser pump-probe experiments which require precise synchronization between the synchrotron bunch and laser pulse. A laser system and its infrastructure will be provided separately by Leibnitz-Institut für Oberflächenmodifizierung (IOM), Leipzig. Two recently upgraded experimental stations, LiXEdrom and SOL³PES will be used at U49/2 PGM-2 to be fully functional in order to meet their designed capabilities. The LiXEdrom experimental station is equipped with high energy resolution X-ray spectrometer and dedicated to investigation of functional materials in solution and at surfaces and interfaces, with X-ray absorption (XAS) and resonant inelastic X-ray scattering (RIXS) techniques. The SOL3PES station, dedicated to photoelectron spectroscopy (PES), offers high electron collection efficiency and an excellent energy-resolution for new experiments, following chemical reactions in solution.

The project Aquarius started in March 2016. Nearly 30 months are needed to procure the mirrors and gratings. But, in accordance with the project goals, a state of the art beamline setup will be finished until June 2019.


Beamline design


Flux simulation

Author: Ronny Golnak