XFEL Operations

Well, it was me... We have several deviating energy measurements in the I1 section and we have always wondered which of the measurements is correct. In fact, the problem is not solved yet but we made a decision during setup that I want to tell you. The currently correct electron beam energy measurement in the I1 dogleg is 129 MeV. This might be counterintuitive because now all measurements are below 130 MeV but there are indications that this might be just fine.…

Screenshot 2023-01-24 at 08.59.22.png This information is not valid any more. The phase shifter is back in operation. The phase shifter of SASE2 cell 17 is currently not working. As you know, cell 17 is upstream the second chicane and important for proper pulse intensities. In other words, the unavailability of this phase shifter is currently preventing reasonable operation of the beamline. The undualtor group is informed and will repair the phase shifter as soon as possible.

Hi all, last Monday, al XFEL tunnels were closed again, and since Tuesday afternoon, the interlock light tests have also been completed and we are allowed to restart XFEL.  As usual, you could find the restart plan in the logbook following the link "Schedule" or you can klick here https://ttfinfo.desy.de/XFELelog/show.jsp?dir=/doc/Schedule&pos=2023-01-03T16:08:05.  First electrons have been accelerated already in the injector and we hope that we can achieve transmission to TLD,…