The ultra-high vacuum-compatible measurement setup in the REGAE sample chamber at DESY: The electron beam strikes the sample (centred in the image) from the right. The diffraction pattern is recorded by a detector 4.30 metres away which is not visible in the image. The sample can be positioned in the electron beam with micrometre precision and rotated very precisely using the goniometer to which it is attached. (Photo: DESY, REGAE group)
