Six experimental tables are needed for the I12 beamline. Three of these tables are situated in the first experimental hutch, and three in the second experimental hutch. All tables include multi-axis motions to facilitate specific tasks. In this, they differ from most simple experimental tables which usually offer vertical and horizontal adjustment only. Detectors and optical elements will be directly installed onto the tables’ interface plates. Some tables include motorised floor rails that allow moving the whole table over a large distance within the experimental hutch. The floor rails are mounted on plates that are being grouted into position.
Because the tables are mounted on surveyed and grouted plates, no mechanical adjustment for table alignment is needed. This should improve the stability of the table on the floor. Floor rails are motorized. Rails and motors shall be mounted on floor interface plates which will be fixed to the facility floor. Floor interface plates for tables without rails will also be fixed to the facility floor.
The top interface plate has a rectilinear set op tapped M6 holes on the surface. The spacing between adjacent holes is 50 mm and the central hole is located in the middle of the plates. As an exception, the spacing of the interface plate of the large detector over-head units is 25 mm. In addition to motions, particular table sizes are specified, as well. The z-limit of a table is that part that cannot be covered by the top interface plate in neither extreme position of its z-travel. The upstream z-limit points in the same direction as the x-ray beam, the downstream z-limit points in the opposite direction. For both these dimensions, only maximum limits are given. These limits specify how close to the z-slide other tables or equipment can be brought.