The practical training takes place at the Paul Scherrer Institut and allows participants to do experiments in groups at the large facilities, such as the spallation neutron source SINQ, the Swiss Muon Source SμS as well as the Swiss Light Source SLS.
The participation fee for the practical training of CHF 200.00 has to be paid cash upon arrival to the School on Saturday, August 15, 2015.
The fee covers the entire practical training, including accommodation for 2 nights (August 21 - 23, 2015) at the PSI Guesthouse (incl. breakfast, lunches and dinners).
Transportation from Zuoz to PSI on Friday, August 21, 2015 is not included.
The following practical training sessions will be offered:
|Facility||Beamline||Title / Abstract|
|SLS-Photons||Material Science||X-Ray Powder Anomalous Diffraction Experiments. Changes in the intensities of certain Bragg peaks by over three orders of magnitude in the powder pattern of GaAs at selected energies in the neighbourhood of the Ga- and As-K-edges will be recorded. These effects highlight the power of anomalous variations in complex structure factors to provide insights into the atomic structure of materials.|
|SLS-Photons||ADRESS||Angle-resolved photoelectron spectroscopy (ARPES) directly probes the electronic structure of crystalline materials, surfaces and interfaces with resolution in electron momentum k. After a practical introduction to the synchrotron radiation ARPES instrumentation, you will carry out experiments on monocrystalline Ag to determine the three-dimensional band structure and Fermi surface of this prototype d-metal.|
X-ray magnetic circular dichroism (XMCD)
probes the magnetic moment at the sample surface in an element specific way. Using so-called sum rules, absolute values of spin and orbital angular momenta can be obtained. In the practical training you will record x-ray absorption and XMCD spectra as well as magnetization curves M(H) on a transition metal thin film and on a sample of a molecular complex. You will analyze the measured x-ray spectra by applying the sum rule formalism and model the M(H).
X-ray absorption spectroscopy (XAS)
probes the local geometric and electronic structure of the element of interest under reaction conditions. XAS can be collected under in situ conditions. In this practical training you will collect XAS spectra of one unknown sample and several references. You will analyse the spectra to determine the oxidation state of the metal and local structure (identity and number of nearest neighbour atoms, bond distances).
|SINQ-neutrons||Morpheus||Depth profile of the density in a layered Ni/Ti film: Neutron reflectometry (NR) is a method to probe the laterally averaged nuclear and magnetic depth profiles close to a flat surface. The power of the method will be demonstrated on the example of the depth-profile of the nuclear potential of a Ni/Ti multilayer.|
|SINQ-neutrons||Eiger||Spin waves in the fcc lattice antiferromagnet MnS2: Inelastic neutron scattering (INS) is a powerful method to measure magnetic excitations in quantum magnets. One such system is the fcc lattice antiferromagnet MnS2. In its magnetically ordered phase the magnetic excitations are the so called spin waves. We will determine the spin wave dispersion using the thermal neutron triple-axis spectrometer EIGER at PSI. There will be a related practical where we model and fit the experimental data.|
μSR - application to magnetism
During this demonstration experiment, we will be using μSR to determine the temperature dependence of the order parameter of a magnetic system. The experiment will be performed on the GPS instrument of the Swiss Muon Source SμS.