: The European Synchrotron Radiation Facility (ESRF) in Grenoble, France, is an 850-m-diameter synchrotron that produces x rays to create molecular- and atomic-scale images. It is now scheduled for a €150 million ($204 million) upgrade to increase its maximum intensity by a factor of 1000. Synchrotrons produce x rays by bending high-energy electron beams around circular paths and collecting and focusing the resulting x rays into beam lines. The upgrade will entail replacing the accelerator's magnets, which are used to bend the electron beam around the ring, with newer and more powerful ones. Also included in the upgrade is the addition of four new beam lines and further upgrades to instrumentation.