THE MAX IV SYNCHROTRON LIGHT SOURCE

Abstract

The MAX IV synchrotron radiation facility is currently being constructed in Lund, Sweden. It consists of a 3 GeV linac injector and 2 storage rings operated at 1.5 and 3 GeV respectively. The linac injector will also be used for the generation of short X-ray pulses. The three machines mentioned above are described with some emphasis on the effort to create a very small emittance in the 3 GeV ring. Some unconventional technical solutions will also be presented. DESIGN PHILOSOPHY When designing the MAX IV facility [1], the following assumptions were made: Storage rings will remain the workhorses as light sources for the foreseeable future. The ring emittance can be reduced towards the diffraction limit. FELs will open up new research areas. The MAX IV design [1] result is shown below. It consists of a 3 GeV S-band injector linac and 2 storage rings operated at different electron energies to cover a broad spectral range. The linac will also be used to feed a Short Pulse Facility (SPF) and could eventually feed a FEL at a later stage. The technical solutions are characterized by a high degree of technical integration as will be seen below. The storage rings are operated at 3 GeV and 1.5 GeV respectively. Two copies of the 1.5 GeV ring will be built, one will be placed in Lund and the other will be placed in Krakow [2] in cooperation with the Solaris staff. To reduce electron beam emittance in the 3 GeV ring, the 7-bend achromat concept [3] was followed.