SURF Goniometers

Goniometers for mounting samples

The standard normal reflection mode of the reflectometer has a 2 arc goniometer stack (Φ and Ψ motions) on top of a linear translation stage which is all mounted on a height table. The motions except the height table are standard Micro-controle equipment. Drawings of the layout of the sample area configuration is shown in Figure 6. For liquid samples the goniometer stack is removed and an active anti-vibration table fitted.

The key parameters and load capacities of the sample position is listed below:

 

Motion

Range

Resolution

Load capacity

BG80 (Φ motion)

+45°

0.001°

12kg

BG120 (ψ motion)

+45°

0.001°

20kg

Linear translator

600 mm

<0.05mm

120kg

Height table

100 mm

<0.05mm

100kg

Anti-vibration table

----

----

150kg

The minimum distance from height table surface to beam centre is 236 mm and the maximum is 341 mm. If the translator is added these figures are modified to 121 mm (min) to 226 mm (max).

Sample mounting on the goniometer is via a kinematic plate. If users wish their equipment to fit onto these plates then they should contact the instrument scientist for full design drawings.

A schematic diagram can be found in the instrument manual.

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