Abstract

MAX IV Laboratory is the Swedish national synchrotron radiation facility that comprises three accelerators with varying characteristics [1]. One of them, the 3 GeV storage ring, is the world’s first fourth-generation (green field) ring and pioneered the use of the multibend achromat lattice to provide access to ultrahigh brightness X-rays. This is now followed by a wave of new facility constructions and ambitious upgrade plans inspired by MAX IV’s success. ALBA is one of them.

All beamlines on our nearly diffraction-limited 3GeV storage ring take advantage of this source's uniquely small emittance in several ways. We will discuss this and show how this translates into unprecedented opportunities to be at the forefront and develop X-ray techniques that benefit from X-ray beams with small divergence, small beam size, a large number of photons per energy bandwidth unit, and large coherent X-ray flux.

While MAX IV has been operating since 2016, we are very excited about and are actively discussing MAX4U, our plan to decrease the horizontal emittance below 100pmrad further and remain at the forefront of possibilities with X-ray science. This should ensure the leadership of Swedish research with X-rays for the next decades. We will briefly introduce MAX4U.

[1] A. Robert et al., Eur. Phys. J. Plus 138, 495 (2023) https://doi.org/10.1140/epjp/s13360-023-04018-w