In order to accommodate a wide variety of sample environments, including all the I22 sample environments and user supplied sample cells and systems, the experiment area has been designed to be very flexible and can be adapted to suit each new configuration. Please talk to a beamline scientist well in advance of your experiment if you are planning to bring your own sample environment to ensure that it will fit.
The beam pipe is the final section of the beamline upstream from the sample (centre-right on diagram). The beam pipe is adjustable to ensure that the air gap is kept to a minimum. The wedge shaped nosecone (centre-left on the diagram above), designed to allow simultaneous collection of SAXS and WAXS data, can also be moved closer to the sample to minimise the air gap. Details of the limits of motion of these beamline components can be found on the schematics below.
The beamline was designed to accommodate a sample environment that fits into a 300mm x 300mm x 300mm box in its standard configuration. We may be able to accommodate sample environments up to a 500mm x 500mm x 500mm box if thay can be designed to avoid a clash with the nosecone.
To minimise the disruption to your beamtime and ensure that your sample environment will work on I22, please consult us when designing your sample environments. Please note that all SAXS beamlines are arranged differently so equipment that was designed to work elsewhere may need to be adapted before use on I22.
The primary platform is the sample table. This is for large sample environments or those weighing between 1-100 kg. The sample table, often refered to as the base table, has 200mm of motorised travel in both x and y using motors named base_x and base_y. The actual travel of the table will depend on your sample environment and we are able to set additional limits to movement to prevent clashes from occurring. Please ask your local contact about limits in your current set up. Some additional manual travel in available in the z (beam) direction. For basic GI-SAXS studies, base_pitch (±5°) andbase_yaw (±10°) adjustments are also possible.
Several solid sections of various heights can be used either on their own or in combination (see blue sections below table top in picture above) underneath the motorised section of the sample platform to adjust the overall height.
Occasionally, problems may occur if the centre of mass of the sample environment is off centre on the base table, particularly if these sample environments are heavy (greater that 25 kg). Please talk to a beamline scientist if you start to experience any issues.
The mounting area of the sample table is 750 mm x 750 mm. The breadboard of the sample platform has M6 screw holes with a 25mm pitch.
The centre of motion for the table pitch and yaw is marked on the diagram below. The centre of motion is slightly off-center within the square region marked by four M6 screw holes.
The precision stage allows accurate alignment of the sample in the beam. The stage has 100mm of travel in both x and y using motors named pxy_x and pxy_y. The stage is only for use with sample environments with a mass of less than 1kg.
The rotation stage is an independently mounted stage that can be set up with its axis of rotation either horizontally (perpendicular to the beam) or vertically. The stage, rot in GDA has full freedom of rotation, i.e. can be driven more than 360 degrees.
The nominal beam height from the floor is 1318 mm.
The vertical distance between the beam and the base table at maximum table height (in standard configuration) is 195 mm.
The vertical distance between the beam and the base table at minimum table height (in standard configuration) is 375 mm.
The table minimum and maximum heights are marked on the diagram below. Please note that addition or removal of a solid section is a time consuming procedure and cannot be performed without prior notice.
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