On September 30, we stored beam for the first time in the MAX IV 1.5 GeV storage ring. This was enabled by injecting into the storage ring (roughly 240 pC per shot net charge in TR1) while powering both 100 MHz RF cavities. Shortly after storing about 0.08 mA (as shown in the screen shot above), we were able to also demonstrate accumulation of up to 1.6 mA. This is seen in the plot below (click to enlarge).
The image below shows the first light coming from this stored beam in the 1.5 GeV storage ring. It was taken at the diagnostic beamline.
The 1.5 GeV storage ring will now remain without beam so that urgent maintenance can be carried out in achromat 2. However, with stored current on the order of a mA we should be able to start first beam & optics characterization studies when the storage ring comes back online next week.