In ultra-high vacuum (UVH) environments, mechanically manipulating, positioning, and preparing samples can pose a complex engineering challenge, usually requiring analytical stages. These analytical stages must be able to deliver a combination of precise linear motion along three axes (xyz) in addition to rotation around one or two of those axes (polar and azimuthal).
At UHV Design, we are at the forefront in high-tech motion, manipulation, and heating product solutions for the vacuum industry. Our high precision analytical stages have been created to meet the ever-growing needs of today’s surface analytical and synchrotron end-station applications.
What is Surface Analysis?
In analytical chemistry, surface analysis refers to the study of the part of a solid which is in contact with a gas or vacuum. When two forms of matter are in contact they form an interface, this interface is known as a surface when it refers to the interface between a solid and gas or a solid and a vacuum.
The surface is the part of the object which interacts with its environment. Interfaces between two liquids, a solid and a liquid or a liquid and a gas are studied separately.
Analytical Stages by UHV Design
Our MultiCentre and the accessories which are associated with it can provide a complete solution for sample transfer and manipulation. They are comprised of configurable analytical stages providing up to 5 axes of motion and options for sample biasing, heating to 1200°C, as well as cooling to <30K.
MultiCentres can be configured to admit most common surface analysis sample holders which includes pucks, flags, and ESCA stubs. A great deal of care and attention has gone into the design of the sample holder so that it has little-to-no magnetic force. This lack of magnetic force means that the analytical stages are compatible with low-energy analysis techniques such as angle-resolved photoelectron spectroscopy (ARPES) which is extremely sensitive to magnetism.
For the user of the analytical stages, the fact that the design encourages scalability is very positive. Customers can select a four-axis MultiCentre configuration just for polar rotation or the five-axis system if azimuthal rotation is necessary.
Many traditional analytical stage designs rely on the surfaces being coiled around the shaft, increasing the swept radius of the stage. Additionally, this creates potential snagging areas and after multiple cycles the cooling pipes can wear out to the point of failure.
Conversely, our analytical stages use the 65mm internal-diameter bellows bore to route all services, including nitrogen cooling coils, to produce a compact design which is uncluttered at the sample stage.
Application of UHV Design’s Analytical Stages
The analytical stages which make up our MultiCentres are a component of analytical experimental techniques for chemical and structural analysis. This analysis can be in the field of semiconductor science, catalysis, nanotechnology, and more. Typical applications of our analytical stages include analytical instrumentation for surface analysis equipment and synchrotron end stations.
If you would like to find out more about our analytical stages please contact us here.