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P03 The Micro- and Nanofocus X-ray Scattering Beamline at PETRA III

Stephan V. Roth Beamline Scientist in Charge

PETRA III as a third generation synchrotron source allows to realize new experimental methods using micro- and nanofocused x-ray beams. Hence, among the first beamlines to be built at PETRA III is the micro- and nanofocus small- and wide-angle x-ray scattering beamline MiNaXS. This beamline will exploit the excellent photon beam properties of the low emittance source PETRA III to provide micro- and nanofocused beams with ultra-high intensity and resolution in real and reciprocal space. Among the novel methods exploiting perfectly the most-brilliant beam, are μGISAXS^[1,3] and μSAXS tomography^[2], as well as their extensions to nanosized beams. Hence, the beamline design foresees dedicated micro- and nanofocus end-stations being both dedicated to transmission as well as grazing incidence experiments. The MiNaXS beamline is exploits one of a high-β canted 2 m undulator pairs. The energy range of the beamline is foreseen as 8 – 23 keV. In combination with Si(111) crystals, this demands a very high stability and precise positioning. To suppress higher harmonics, a planar double-mirror with low incidence angle compatible with the large energy range of the beamline will be used.The details of the two end stations are as follows:

 
• The microfocus end station (hutch EH1) is fully operational and in full user operation. Its beam dimensions are 42 x 20 μm² and 22 x 13 μm², which corresponds perfectly with the design values. In 2012, we will bring an even smaller microfocus (projected beam size 10 x 5 μm²) into operation.
  
• Additionally, a 1:1 imaging layout for combining USAXS (Ultra Small-Angle X-ray Scattering) with a moderately microfocused beam is currently discussed.
  
• A variety of sample environments is offered at the microfocus end station, ranging from imaging ellipsometry^[3] to fluidics and sputter deposition.
   
• The nanofocus end station (hutch EH2) is currently being equipped and commissioned in the framework of a BMBF-project (Verbundforschung, headed by Martin Müller and University of Kiel). It is planned to install here a (300nm)² for a nano­focus.
  

For further documentation of the MiNaXS beamline, please refer to Beamline Manual (Login required, please contact the beamline staff)

Please note:

• microfocus end station (EH1): User proposals are accepted for the microfocus end station (EH1) via the DOOR system.


• nanofocus end station (EH2): Prior to submission please contact Martin Müller (HZG, Geesthacht) or Christina Krywka (CAU, Kiel).


• In case of questions and requirements for your next beam time, please contact us in due time to prepare the experiments:
  minaxscontact@desy.de
  
  You will be contacted by the corresponding local contact.

References

[1] S.V. Roth et al., Appl. Phys. Lett. 88 (2006), 021910. (Abstract/Full text)
[2] C. Schroer et al., Appl. Phys. Lett. 88 (2006), 164102. (Abstract/Full text)
[3] S.V. Roth et al., J. Phys. Cond. Matter 23 (2010), 254208. (Abstract/Full text)