Liquid Cryogen Free Research Systems For Microscopy Applications
No Liquid Cryogens for the Superconducting Magnet
Cooled by a low-vibration, low-maintenance 4.2K pulse-tube cryorefrigerator. This results in a compact system without the interruption of liquid cryogen refills.
Flexible Superconducting Magnet Configurations
9 Tesla standard configuration. Options for 5 or 7 Tesla.
Ease of Use
Includes a high precision X-Y translation stage coupled to a Z-motion stage for supporting the cryostat within the bore of the magnet and translating it in a horizontal plane for full sample observation.
Variable Temperature Microscope Cryostat
Ultra high stability continuous flow cryostat for high spatial resolution microscopy with isolated delivery and vent lines, offering a typical drift of 50 nm over a five minute period.
The cryostat can be operated in a standard configuration outside the superconducting magnet system’s bore if desired.
A second window is located on the bottom of the cryostat for transmission experiments (with appropriately designed sample mount).
High Efficiency Transfer Line
Liquid helium (or nitrogen) can be transferred into the microscope cryostat with no measurable disturbance of the sample.
Includes superconducting magnet, 4.2K cryocooler system, microscope cryostat, superconducting magnet power supply, temperature controller, thermometry, and LabVIEW® drivers.
An ultra high stability continuous flow cryostat for high special resolution microscopy with isolated delivery and vent lines is part of the system. It offers a typical drift of 50 nm over a five minute period.
The cryostat is also designed for ultra low sample movement during cool down from room temperature, as determined primarily by the intrinsic thermal contraction of the gold plated copper sample mount.
The cryostat is enclosed within a nominal 6 inch diameter vacuum chamber with one ten pin electrical feedthrough, one blank feedthrough, an evacuation valve and a nominal 29mm OD bore entry tube to penetrate the bore of a superconducting magnet. This allows full sample observation by an appropriate microscope while manipulating the cryostat within the magnet bore.
The snout extension is removable for operating the cryostat in its standard configuration outside the magnet bore. A high efficiency liquid continuous flow transfer line for transferring liquid helium (or nitrogen) into the variable temperature cryostat is provided. It is designed so there is no measurable disturbance to the sample mounting surface.
The sample mount is nominally 16mm in diameter. A heater and magnetic field independent temperature sensor are provided for measuring and controlling the temperature of the sample. The sample mount extends into the high field region of the superconducting magnet and is replaceable for operation in the standard configuration outside the bore of the magnet.
The temperature of the sample mount can be varied from approximately 4.5 K up to 300 K (400 K optional). A fused quartz window with a nominal clear view of 16mm and a thickness of 1.6mm is provided for full viewing of the sample mount. A second fused quartz window is installed at the bottom plate of the cryostat with a nominal opening of 1 inch and a thickness of 1.6 mm. This can be used for transmission experiments with an appropriately designed sample mount.
To position the cryostat within the superconducting magnet bore, a high precision X-Y translation stage coupled to a Z-motion stage is provided. This allows precise positioning for full sample observation.
Optional items include:
- A second ten pin feedthrough with 5 twist manganin lead
- A mini ten pin connector, the mating connector and external cable
- 30 liter LHe storage dewar
- High stability pressure relief valve
- Vacuum pumping station
- Electronics cabinet
- Variety of temperature sensors