In the field of Research there is a large variety of applications that need to be cryogenically cooled. These complex instruments are often related to Research in Physics, Nuclear Physics and Biology.
DH Industries provide a variety of products and systems to support the field of Research with their cryogenic needs.
To guarantee cold storage in Biology, our Stirling brand liquid nitrogen production systems are used in many Research facilities to secure LN2 supply for storage of samples. Some examples of Research in Biology are:
- Artificial Insemination, improving cattle but also dog and hors breeds.
- Virus Institutes, for instance in remote places in Africa, collecting and studying viruses.
- Human medicine: genetics, immunology and oncology.
- Oceanographic Research Vessels storing samples in LN2 which are taken from the ocean or ocean floor. To avoid large quantities of LN2 to be stored on long voyages, LN2 is produced on-board with a StirLIN liquid nitrogen system.
In Physics, research instruments and detectors tend to be large facilities in need of dedicated cryogenic cooling systems. DH Industries can design such systems based on the applications needs. These custom design systems will include our own products Stirling Cryogenerators and CryoZone CryoFans, integrated with other components such as vessels, valves and measuring equipment to supply an integrated total cooling system.
Examples of cooling systems in Research applications are:
- In Nuclear Physics Stirling Cryogenerators are used to re-liquefy methane and hydrogen acting as cold moderator. By cooling a flux of neutron these are slowed down, enabling enlarged interaction with materials and hence better output of the instruments.
- Crystals used in laser amplifiers need to be cooled to become efficient at temperatures around 80K. To avoid optical pollution, a flow of cold helium gas is circulated through the crystals. Circulation is done by our CryoFans, cooling by our Stirling Cryogenerators.
- Liquid argon neutrino detectors. A large bath of high purity argon is used to ‘catch’ neutrinos, colliding occasionally with an argon nucleus creating a photon which is detected. Given the high purity of the LAr, the remote underground site and the cost of argon, this must be protected from boiling off. Stirling Cryogenics has supplied systems to indirectly cool the LAr bath with a closed liquid nitrogen loop.
- Measurement of radioactivity. These detectors are used to detect radioactivity in areas like Chernobyl and the Polynesian Islands. They need to be cooled with LN2 to function, for which a StirLIN system is used as local production facility.
- Shielding of low temperature devices. In Physics, many devices are cooled at LHe temperatures. To protect these from incoming heat, they are shielded to adsorb this heat before it reaches the actual cold instrument such as LTS magnets. These shield are cooled with helium gas around 20K using CryoFans and at 80K with LN2. In both cases Stirling Cryogenerators are used for the cooling of these flows.
In Space Propulsion new kinds of motors like ion flux drives are being developed. These are tested in vacuum chambers, needing cooling power for heat shielding and for cryopumping the vacuum.
Click on below logo's to be directed to the Research sections of our brands Stirling Cryogenics (Cryogenerators, crycoolers, closed loop cooling systems and cryogenic solutions) and CryoZone (CryoFans, Cryogenic Circulators, heat exchangers for cryocoolers and cryogenic liquid pumps).