Helmholtz-SESAME soft x-ray beamline HESEB

Welcome to the Helmholtz SESAME Soft X-ray Beamline Project HESEB


This initiative is launched by the Helmholtz research centre DESY in Germany with the plan to build a new state-of-the-art beamline in the soft X-ray range at SESAME to be used for a large number of top-class scientific applications with the goal to create new research opportunities at SESAME and to enhance the cooperation in photon science between German and European research groups and the SESAME members.

Within the four years long project a Helmholtz consortium of five German research centres (DESY, FZJ, HZB, HZDR and KIT) will design, construct and install a soft X-ray beamline at SESAME with place for two advanced experimental endstations which will come from extra funds from the SESAME member countries. In the course of the project the initiative shall act as a seed to create international user consortia contributing to the setup and development of experimental stations, special sample environments and further instrumentations. In particular Turkish users have already announced to raise funds to build a photoemission endstation for the soft x-ray beamline.

Corresponding training, education and support measures offered by the participating Helmholtz centres will guarantee the international scientific attractiveness and quality of the beamline and secure its long-term scientific use and excellence by creating own scientific user communities and by building up long-lasting cooperation within the SESAME members. After construction and successful commissioning, the SESAME research centre will have to take over the responsibility of the beamline and will permanently operate this instrument as part of its beamline portfolio.

Soft X-rays together with powerful X-ray optics and detector systems, offer the possibility to investigate a great variety of scientific issues in solid state, interface and surface physics, in physical chemistry, biological systems and in earth and environmental sciences. The element-specific interactions of soft X-rays with matter allow analytical spectroscopic investigation procedures with high precision for many elements of the periodic system, particularly at surfaces and interfaces. Established techniques to use photoelectron and absorption spectroscopy and resonant inelastic X-ray scattering allow numerous scientific applications, e.g. in the field of energy and semiconductor materials, magnetic films or in-situ investigations at homogeneous catalytic systems. There are also many applications of soft X-rays in the field of cultural heritage by measuring fluorescent light on ancient samples and materials.

The proposal of the Helmholtz SESAME beamline in the soft X-ray range fits perfectly well to the recommendations of the SESAME strategic development plan to realise a beamline in the soft X-ray range, which is strongly supported by the scientific user communities of the SESAME member countries. The beamline will be fully complementary to the existing SESAME beamlines in the infrared and to the hard X-ray range currently under construction.