PETRA IV Workshops

PETRA IV workshop

Participants of the PETRA IV workshop Research with High Energy X-Rays at Ultra-Low Emittance Sources 13-15 February 2017 at DESY.

In a series of upcoming workshops the science case for the ultralow emittance storage ring PETRA IV will be discussed with experts and future users from many fields of science.

 

Upcoming Workshops 2017

PETRA IV

Tribology and Interfaces in Functional Materials
15-17 March 2017 at DESY


Controlling energy dissipation due to friction is a cornerstone on the way to further advance the energy efficiency of mechanical processes and to reduce emissions. This requires to identify the relevant physical processes on length scales from macroscopic to nanoscopic dimensions. A fundamental understanding of the frictional processes, resulting in the synthesis of reduced-friction materials would thus have an enormous economic impact. Despite great advances in the measurement of frictional forces on the atomic scale, friction coefficients between two materials are still empirical quantities. The reason for the lack of understanding in this field is the fact that the contact region between two materials is hardly accessible to a direct study unless they are transparent.

Micro-and nanofocused beams of hard X-rays from an ultra-high-brilliance synchrotron radiation source like PETRA IV are uniquely suited to illuminate the contact area between two sliding surfaces with outstanding spatial resolution. These beams give access to structure and dynamics of frictional processes under operando conditions. The goal of this workshop is to discuss scientific cases related to tribological challenges that can be addressed by efficient X-ray scattering methods for characterizing dynamical and structural properties of interfaces in sliding contact.

Organized by Martin Dienwiebel (KIT) and Ralf Röhlsberger

PETRA IV

Timing Experiments at PETRA IV
27-29 March 2017 at DESY


Present-day third-generation synchrotron radiation sources enable a wide range of experiments that exploit the time structure of the radiation. These include time-of-flight measurements of secondary particles, the study of non-equilibrium phenomena via pump-probe experiments and nuclear resonant scattering, covering scientific fields that range from the study of gas-phase interactions to the electronic and magnetic properties of correlated materials. All these experiments rely on the bunch length and the bunch separation in the different operation modi of PETRA III.

In a diffraction-limited storage ring like PETRA IV, the bunch charge will have to be distributed more evenly over the circumference as compared to present-day sources in order to reach a diffraction-limited low emittance. It is the goal of this workshop to discuss the timing properties that are required for the different fields of applications to make optimum use of PETRA IV. In the ideal case one wishes to compromise as few methods as possible while benefitting as many experiments as possible by combining timing and time-resolution with the outstanding properties of a diffraction-limited storage ring.

Organized by Jens Viefhaus and Ralf Röhlsberger

PETRA IV

Second Workshop 'Science at PETRA IV'
  9-11 May 2017 at DESY


With its ultra-low emittance PETRA IV will provide unprecedented experimental possibilities for many fields of science. This workshop is intended to bring together the experts from all the fields of science that are currently served by PETRA III and discuss the impact of the upgrade to PETRA IV for the respective fields. The goal is to find and exploit synergies and inspire scientists to make use of new experimental opportunities that may at present not be applicable to their field.

Organized by Christian Schroer and Ralf Röhlsberger

PETRA IV

PETRA IV Coherence Workshop
26 - 28 June 2017 at DESY

With its ultra-low emittance and dramatic increase in degree of coherence PETRA IV will provide unprecedented experimental possibilities for coherence application techniques. This workshop is intended to bring together experts from fields as X-ray Photon Correlation Spectroscopy (XPCS), Coherent X-ray Diffraction Imaging (CXDI), X-ray ptychography, and X-ray Cross-Correlation Analysis (XCCA) to discuss the impact of the upgrade to PETRA IV for the respective fields. The goal of this workshop is to illuminate scientific cases related to coherence applications that can be addressed by the increased coherent flux at PETRA IV for characterization of dynamical and structural properties of materials.

Organized by Gerhard Grübel and Ivan Vartaniants

 

Archive Workshops 2017

PETRA IV

Research with High Energy X-Rays at Ultra-Low Emittance Sources
13-15 February 2017 at DESY


High-energy X-rays are used in many fields of science, from solid-state physics, chemistry and biomedical science to geoscience, engineering materials science and nanotechnology. PETRA IV can provide unique conditions for experiments with high-energy X-rays. In particular, the high-energy X-ray beam can be efficiently focused to obtain local information about the sample, e. g., using powder and single-crystal diffraction, pair-distribution-function (PDF) analysis, grain mapping, imaging in absorption and phase contrast, and potentially even coherent X-ray diffraction imaging. In this way, PETRA IV opens a unique perspective for in-situ and operando experiments.

The scientifc case for high-energy X-rays at an ultra-low emittance source will be discussed together with the required experimental parameters.

Organized by Uta Rütt, Ann-Christin Dippel and Christian Schroer