Closing the first in-vacuum undulator gap

We have started to close the gap of our first in-vacuum undulator IVU18 from Hitachi at the BioMAX beamline. The minimum gap setting we achieved today was 7 mm. With the gap closed we still see reasonable lifetime and orbit. Work will now start on compensating for the effects of this ID in order to make it transparent to other users at the MAX IV 3 GeV storage ring.