Schematic view of the storage ring DESIREE. A 34 keV beam of S₈⁺ ions is mass selected by a bending magnet and is injected into the cold ring. The circulation direction of the ions is depicted by arrows. A detector for neutrals formed upon fragmentation is placed after the straight section opposite to injection. In addition, a second detector is placed on the side of the stored S₈⁺ beam, after a 10° deflection, to measure the charged species created by fragmentation. Both detectors are position-sensitive. In the top-left corner, an image of the fragment detector is shown, depicting ions corresponding to SS₅⁺ and SS₆⁺.