21. December 2015
To the beam tunnelLarge Research Facilities SwissFEL
Since the autumn of 2015, the SwissFEL beam tunnel has been filling up with the machine components for the new PSI large research facility. Piece by piece, the pre-assembled components are being brought to their final destinations.
Parts to create the X-ray light
The beam tunnel is where those parts of the facility are being installed that will create the SwissFEL X-ray light: the injector with the electron source, the linear accelerator and the undulators. The electrons are created and pre-accelerated in the injector, while the linear accelerator is where the necessary additional energy is added and the undulators are responsible for sending them on a slalom path. This then forces the electrons to emit the SwissFEL X-ray light.
Roughly 200 transport journeys
Most of the components are pre-assembled in halls in the surrounding area on granite girders that are each about four metres long. They are then brought to the SwissFEL building piece by piece.
It is only the undulators that are completely assembled in the building itself, says Johan Wickström, who coordinates the transportation of the machine components. A total of around 200 transport journeys are planned for the components in the beam tunnel. Approximately one quarter of the beam tunnel has already been filled. By the autumn of 2016, all of the components – from the injector to the undulators – should be assembled and ready in the beam tunnel.
Commissioning in stages
At the same time, the high-performance amplifiers for the injector are being installed on the level above. They will generate the microwave pulses needed to accelerate the electrons created in the injector. Commissioning of the SwissFEL will take place in stages and start in the spring of 2016 with the injector. The first pilot experiments are planned for 2017.
Text: Paul Scherrer Institute/Martina Gröschl Photos: Paul Scherrer Institute/Markus Fischer
VideosA SwissFEL accelerating structure is brought into the beam tunnel
Camera travels through the (almost) empty SwissFEL
First undulators reach the SwissFEL building