Nuclear resonance techniques for high-pressure research: example of the ID18 beamline of the European Synchrotron Radiation Facility

We review applications of various nuclear resonance techniques for high-pressure experiments within the nearly 30-year-long operation of the Nuclear Resonance beamline at the European Synchrotron Radiation Facility (ESRF). Starting from a short introduction to the relevant techniques, we discuss the corresponding experimental setups, involved X-ray optics, and examples of applications. In addition, we emphasize the benefits of conducting high-pressure experiments in combination with other extreme conditions and introduce new focusing capabilities for extreme-pressure studies. Finally, we provide a short review of utilized detector systems, electronics, and available packages for data treatment.