The PETRA IV Workshop: Extreme Conditions Research at an Ultra-low Emittance Storage Ring will take place from 16. - 17. October 2017 at DESY, Hamburg, Germany.

The Deutsches Elektronen-Synchrotron (DESY) is planning to upgrade PETRA III to an ultra-low emittance storage ring reaching the fundamental limit of diffraction at 1 Angstrom at energies below 10keV. With this upgrade, called PETRA IV, Germany will offer a light source with outstanding properties in hard X-ray regime to the international scientific community. The facility is expected to herald new science at extreme conditions using the Diamond Anvil Cell (DAC) and Large Volume Presses (LVP).

We would like to invite you to the discussion of a wide range of topics presented by members of the community and experts from other synchrotron radiation facilities also going through an upgrade to ultra-low emittance storage rings. The following topics will be discussed:

• Simulation of impact events using the dynamic driven DAC: Advantages of using pink beam and coherent imaging at PETRA IV
• Exploration of Earth and materials science at super high pressure and temperature conditions in the DAC and LVP at PETRA IV
• Chemistry and synthesis of new materials at high pressures and temperatures in the DAC and the LVP: Making use of combined diffraction, spectroscopy and imaging at highly coherent and ultra-low emittance sources
• Ultra-high pressure physics of elemental and molecular systems
• Stress and strain analysis of earth mantle components and industrial relevant materials
• Water and carbon cycle in the earth relevant to dynamics of the earth surface using  imaging and diffraction
• Evolution of the earth from accretion to fractionation today: Effect of melting and solidification in the earth crust and mantle

We welcome additional contributions by the community.