ID11 piste map schematic showing the locations of the hutches located along the beamline. EH2 refers to Experimental Hutch 2, a workstaiton that is no longer operational.

 

X-ray source

The light source at ID11 is provided by an in-vacuum undulator, of which there are two available (U22 and CPM18) which differ in period and magnetic lattice. The coherence and source size of the beam has been measured as ~18.5 micron FWHM vertically.

Primary optics

Energy selection: ID11 uses a double bent crystal monochromator operating in horizontal Laue geometry to select the energy / wavelength of the beam. The maximum energy range available is from 18 – 140 keV, though operationally, ID11 is optimized to work at energies above 35 keV.

Focusing: To focus the beam, ID11 has an in vacuum transfocator, which consists of 8 cylinders with 1, 2, 4, 8, 16, and 32 Be lenses, 32 and 64 Al lenses, and one with a pinhole. By combining these sets of lenses it is possible to focus throughout the entire energy range in EH3 (smallest focal spot size ~50x220 microns), and up to 70 keV in EH1 (focal spot ~ 7x45 microns).

Experimental hutch 1 (EH1)

The diffractometer in EH1 is situated 41 m from the source and is rated for heavy loads (>200 kg) so suitable to support large samples / sample environments. The diffractometer has a ~2 micron sphere of confusion and movement in x, y, z & ω. The omega rotation has an angular resolution of 1 ArcSec and a wobble of < 2 microns at the sample position.

There is also a dedicated FReLoN camera suitable for 2D diffraction pattern acquisition. This is optimised for very rapid readout, allowing full (2048 x 2048 pixels, 16 bit) frames to be read out in ~240 ms, which can be further increased binning or the use of regions of interest. A fluorescence detector is also available for mounting in the hutch.

Secondary focusing optics

There is a second optics hutch (OH2) situated before the 3rd experimental hutch (EH3), 91 m from the source and 1.5-2 m away from the sample mounting position in EH3. The optical systems available here are:

  • Kirkpatrick-Baez (KB) mirror
  • In-air transfocator
  • Aluminium lenses

These are arranged on a single y-axis translation so that, in conjunction with OH1, a variety of different optical configurations maybe used with rapid changing between arrangements. For high-energy nano-focussing applications, two sets of nano lenses are available (sub-micron beam size), and the aluminium lenses can also be used. These are mounted directly to the diffractometer in EH3 in order that the optics and sample vibrate in tandem.

Experimental Hutch 3 (EH3)

EH3 contains a high resolution diffractometer, situated 94 m from the source. This station was built to carry out experiments with ~1 micron spatial resolution. EH3 has its own dedicated optical systems (OH2) offering a range of focussing methods as described above. The diffractometer has movement in x, y, z, θ, and ω and on it is mounted a sample stage with movement in x, y, z, rx & ry) and a variety of permanently mounted detector systems, in order to allow the rapid switching between different experimental configurations, as well as simultaneous use of some detectors. The detectors available are:

  • Dectris Eiger2 X CdTe 4M
  • Near field FReLoN camera
  • Far field FReLoN camera
  • Imaging Detectors (PCO, Marana)
  • Fluoresence detector

Please follow this link for a description of the detector systems available at ID11.