Storage Dewar Magnet System
The simplest magnet system is one where a sample insert has a small 6T magnet bolted at the bottom. Such an insert would have an integral variable temperature insert with sample space of 25 mm. These inserts are very effective in performing transport studies on nano size specimens and can be a useful tool to demonstrate the Quantum Hall Effect for educational purposes or for prescreening samples before they are tested at facilities that are not easily accessible.
Pulse Tube Based RT bore system
These style systems are available in wide range of bore sizes and fi elds up to 15T and are designed in both horizontal and vertical geometries. The thermal mass is cooled by a Gifford-McMahon or a pulse tube cryocooler depending on the individual application. Pulse tube based cryocooled systems are recommended for applications that might have concerns with vibrations, however they have higher initial costs but lower long term maintenance costs. In case of pulse tube configuration, it is possible to reduce vibration levels even further by adding bellows assembly and positioning motor remotely. Some of the most common applications include material processing, beam line studies or use with existing sample inserts . Materials processing customers have found this geometry very suitable for annealing samples in presence of magnetic field.
Radial Access RTB Magnet System
Radial access magnets are made of NbTi / Nb3- Sn with wide angular access for accessing the transmitted or refl ected beams. These systems are available for fi elds up to 10T with active shielding. An extension of these are our popular CF MAxes TM systems. These use combination of two or more split coils to produce 2-axis or 3-axis geometries. An OptiMAxes TM uses 3 conduction cooled split coils to provide optical access in two planes. CF MAxes TM magnets have also been produced for our OEM’s who have integrated them with Cryogen free dilution refrigerators.
• Radial access cryogen free magnet systems available up to 10T
• RTB MAxes systems available in 2 or 3-axis geometries
• Actively shielded magnet systems available for spectroscopy applications including Mossbauer studies
• Custom designs available for x-ray & neutron diffraction
Low Vibration VFVT system with remote motor operation
VFVT system is one of the most desired cryogen free magnet system for use in material science and condensed matter physics laboratory. The system uses a single cryocooler (GiffordMcMahon or pulse tube) to cool the sample space and superconducting magnet, thereby eliminating need for liquid helium and associated expensive recovery systems. Custom designed configurations are available for exotic experimental needs.
• Available in vertical fields up to 14T.
• Available in horizontal fi elds up to 10T
• 30 mm sample space with 2K to 325K operation using He exchange gas
• Systems available with customer defi ned window material for spectroscopy studies
• CF MAxes TM systems available with vector fi eld up to 5T
• CF OptiMAxes TM systems available with vector fi elds up to 2T
• Unique dual-axis confi guration available for positioning sample in vertical or horizontal fi eld confi guration
• Turnkey system with software controlled VFVT environment
RTB Recon Magnet System
Based on heat load and size of the superconducting magnet either a dry conduction cooled or ReCon TM style geometry is recommended. ReCon TM style magnet systems use cooling power of a closed cycle 4K cryocooler to recondense gaseous helium back into the liquid Dewar. The evaporating gas is liquefied in a thermodynamically effective manner and the cryocooler is strategically located in the Dewar. The first stage of the cryocooler is used to cool the shields of the Dewar thereby eliminating the need for any liquid Nitrogen. ReConTM magnet systems offer combined benefits of traditional LHe systems with near zero helium boil-off. These style systems are ideally suited for retrofitting existing magnets and sample inserts into a re-engineered Dewar with a suitable gas handling system. Pulse tube cryocoolers are ideal for applications that desire lower vibrations.
• ReCon TM solenoid systems available in vertical or horizontal geometries with fields up to 16T and wide bore sizes
• ReCon Maxes TM systems are available with vector fi elds up to 6T
• ReCon OptiMAxes TM systems are available in 2 or 3-axis geometries
• ReCon TM split coil systems available in optical and non-optical confi gurations with fi elds up to 10T
• ReCon TM systems with customized gas handling system is available with 1.5K/ He3 insert or with a dilution refrigerator
Bottom Loading Magnet System
Bottom loading magnet systems are typically used when a small diameter (e.g., 8 inches or less), top-loading sample insert is to be used and the magnet is relatively large. The magnet is installed from the bottom of the dewar through a series of bolted flanges and installed on the bottom of liquid helium reservoir. This allows the dewar neck diameter to be small, thus minimizing the liquid helium consumption. Bottom loading systems can be used with solenoids, split coils, gradient coils, etc.