You will have the great opportunity to participate in a 3h experiment by yourself in a small team. We greatly appreciate the support of the beamline managers to offer the following experiments.
Please choose one of them in the registration form or leave that field free.
P05 Imaging Beamline
The PETRA III P05 beamline is dedicated to full-field x-ray tomography. The microtomography setup of P05 offers 3D scans of samples of up ~12mm size with 1-2 µm spatial resolution. Within the practical you will gain a detailed insight into how data is taken and subsequently processed.
P11 High-throughput Macromolecular Crystallography Beamline
Beamline P11 is dedicated to diffraction experiments of biological macromolecules and designed to provide a stable yet flexible setup. During the practical, you will perform an MX experiment with a protein standard (such as lysozyme or insulin) in cryo conditions. You will learn about the concepts and instruments of the beamline as well as the data processing and structure solution.
If you want to participate and have particular wishes, you are welcome to get in contact with the staff at P11: p11beamline@desy.de.
P21.1 High Energy X-Ray Diffraction for Physics and Chemistry
The practical session at beamline P21.1 will use high energy x-rays to obtain diffraction and total scattering patterns from various samples. The data will be processed to obtain the pair distribution function. The different information content of diffraction and total scattering data will be illustrated.
P24 Chemical Crystallography:
At beamline P24 the participants of the practical will get a tour of the beamline including optics hutch and both experimental stations. We will demonstrate to them how to use the four circle diffractometer. The participants will get a batch of crystals and can learn how to select and mount crystals. They will then center the crystal on the diffractometer and collect data. Afterwards they will learn how to visualize and process the data.
P64 Advanced X-ray Absorption Spectroscopy
X-ray Absorption Spectroscopy (XAS) is a powerful method for the investigation of samples from different scientific disciplines. The spectra provide information on the oxidation state, local symmetry, and coordination number and distance of neighbouring atoms. An additional advantage of the method is that crystalline samples, especially large, single-crystals are not required, and that the method works equally well for crystalline or amorphous samples, or in solutions. We will do a few experiments at the XAS beamline P64 in order to study the different benefits (and limitations) of the method.
P65 Applied X-ray Absorption Spectroscopy
Extended X-ray absorption fine structure spectroscopy (EXAFS) is an analytical method that yields information about the near range order around an absorber atom. We will measure EXAFS spectra of anatase and rutile, two crystal modifications of TiO2 and of CrO2 which adopts the rutile structure at beamline P65, DESY’s bulk EXAFS beamline. The three spectra nicely demonstrate, which structural information can be gained from EXAFS spectra and which limitations the method has.
