The first small chamber will house a single pulse shutter that can be used to allow only a single FEL pulse pass through to the experimental chambers. A millisecond shutter from azsol GmbH will be incorporated into the vacuum chamber on a translation stage to allow insertion into the beam.

Two elliptically bent mirrors will be used to image the FEL beam into the experimental chamber. Dynamically bent mirrors can be adjusted to focus the beam into either the interaction region in the high-field physics chamber or the diagnostics chamber, depending upon the experimental requirements.