Community Research and Development Information Service - CORDIS


FAMTO Report Summary

Project ID: HPRI-CT-1999-50004
Country: France

100fs x-ray beamline (laser-plasma)

An ultrafast x-ray workstation has been constructed in a Laser Facility (LOA) to provide a time resolution of 100fs for time resolved x-ray diffraction experiments.

It provides the user community with the required scientific environment to realise application experiments in their field using a femtosecond laser-produced plasma x-ray source. It will be open to the European pool of users through different channels (Access with Research Infrastructures like “LaserLab” and collaboration between teams within Networks like “FLASH”).

We will ensure a dynamic and broad dissemination of this workstation. This is motivated, at first, by the significant technological and scientific advances achieved in the FAMTO project. Experimentalists from multidisciplinary fields have repetitively expressed their desire to have access to still better performance particularly in one direction, subpicosecond x-ray time resolution. FAMTO has strongly participated to the development of this next generation of peripheral equipment at Large Scale Laser and Synchrotrons radiation research infrastructures. Second, beam time is in very high demand by European and National users owing to the increased interest in novel applications. It will be limited at the future large scale X-ray Free Electron lasers that are under development, mainly because the European project will not provide ultrafast x-ray radiation before 10 years, while limited number of beam lines will meet the high demand. Promotion of alternative ultrafast x-ray radiation is a must.

The ultrafast x-ray workstation is ready. A first test experiment (in a time-resolved mode) will be realized in house before opening it to the European pool of users.

The ultrafast X-ray station contains the following parts:
- A 10mJ and 50fs laser system running at high repetition rate (1 kHz);
- An x-ray source working at 1 kHz;
- A toroïdal crystal to collect and focus the x-ray beam onto the sample;
- A full x-ray diffractometer to support the sample, equipped with an additional standard x-ray tube to control its orientation.

Two optical layouts share the same sample position. The first optical layout includes Xcalibur conventional X-ray tube, sample and Sapphire-II X-ray area detector. This setup is used for steady state measurements and orientation of the sample. The second optical layout consists of ultrafast x-ray plasma source, sample and Princeton photon-counting area x-ray detector. This layout can be used for visible pump-x-ray probe experiments once the sample has been aligned and tested with the x-ray tube.

The arrangement of all the components of the diffractometer allows us to move the detector arm within limit of a semicircle, which gives us possibility to work in Bragg and Laue geometry without changing anything. It gives unlimited access to crystallographic directions of a sample for the fs x-ray diffraction experiment.

Related information


Antoine ROUSSE, (Head of the PXF Group)
Tel.: +33-1-69319890
Fax: +33-1-69319996
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