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

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. 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:

  • Near field FReLoN camera (white beam detector)
  • Near field FReLoN camera
  • 3D Detector
  • Far field FReLoN camera, mounted with movements in x,y,z & ry.
  • Sensicam
  • Fluoresence detector

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