Allectra recently supplied a 'Cryo' feedthrough assembly to the Ultracold Atoms Lab, Quantum Technology Hub at the University of Nottingham.
The 'Cryo' Feedthrough Assembly
This component will be used for experiments where cold atoms are used to probe samples to measure their magnetic fields or probe their current paths when current is sent through the samples.
To achieve these results, there is a three step process:
- First, 10^9 atoms of rubidium are trapped and cooled down below microkelvin temperature. Allectra's 5KV power feedthrough is used to achieve the high currents required (up to 100 A).
- Next, the atoms are transported from the cooling region toward the regions where the samples are held with a couple of centimetres of distance. For that, moderate currents are needed, typically 10 Amps and so Allectra's 1KV power feedthrough is used.
- Lastly, for the precise positioning of the atoms (few microns from the surface of the sample) and to send currents through the samples, Allectra's High Density 26 way feedthrough was chosen as small currents (1A) are required.
The copper stem located in the middle of the flange is used to fix the sample holder that also incorporates the features needed for atomic trapping, cooling and transport. As high currents are used, heat management is important and copper stem serves as a heat sink. On the air side, active cooling (Peltier elements) are added to improve the heat transport and prevent the whole assembly from overheating.
The 'ultracold' part of the Midlands Physics Alliance (a strategic partnership between the Universities of Nottingham, Birmingham and Warwick) targets cutting-edge interdisciplinary research at the rapidly evolving interface between cold atom, condensed matter and optical physics.
Allectra GmbH was founded in 2002 in Berlin and now manufactures and supplies a full range of HV (high vacuum) and UHV (ultra high vacuum) components including custom products all over the world. Allectra Limited was started in 2003 in Sussex to promote the products on a worldwide basis. The Allectra sales and service network is also supported by offices in France and Italy. Today, global customers include universities, major Synchrotron laboratories and High Technology companies.