Standard Experiments in EH1

Experimental Hutch 1 (EH1) contains a (2+3)-circle Huber diffractometer. The sample is mounted on and aligned with a Symetrie Breva hexapod. This allows both translation and rotation of the sample around all three axes, with a centre of rotation coincident with that of the diffractometer. The sample is mounted horizontally, i.e. with its surface normal vertical.

Hexapod Specifications

Excalibur Detector

The EH1 diffractometer features an Excalibur 1M detector. This was developed in-house at Diamond and uses a Medipix3 sensor.

Sample Environment Mounting

The standard mounting plate on top of the hexapod replicates the Micos hexapod formerly used on I07. The distance between the mounting plate and the beam position is 170 mm, so any user-supplied sample environment should have a height of 170 mm from its bottom face to the sample position.

I07 can provide a range of sample mounts for straightforward experiments, including those with a simple heater or that provide an inert atmosphere. For more specialised setups, users may wish to provide their own sample environment. Dimensions of the top plate are shown in the diagram below.

Hexapod Mounting Plate

Click for a more detailed view of the drawing.

Horizontal Scattering Geometry

It is possible to work with the sample mounted vertically (i.e. sample normal horizontal) by mounting the diffractometer's so-called "alpha table". This also allows experiments to be conducted with a (2-3)-circle diffractometer geometry, but has the advantage that it is possible to measure reflectivity without being constrained by the 10 degree limit on the arc beneath the hexapod. In this configuration, the older Micos hexapod is used, and the weight limit for the sample environment is 30 kg. The distance to the sample remains 170 mm. Please discuss with the beamline team if you think you would like to use the alpha table

An animation is available showing the movement of the diffractometer circles with the alpha table mounted.