Acryo-TL-4K Top Loading Refrigerator

The Acryo TL-4K is a top-loading 4K refrigerator that efficiently cools low thermal conductivity samples or irregularly shaped samples (powders, liquids, high-pressure packages, etc.) and allows for quick sample changes by pulling and inserting the sample rod while the refrigerator is running. A variety of options are available to meet different experimental requirements or to match the user's budget, such as GM or PT cryocooler with different cooling capacities, lower temperatures, larger sample tube inner diameters, lower vibration, compact tails compatible with superconducting magnets/ electromagnets, optical windows, AC magnetic susceptibility inserts, rotating sample rods, vacuum type sample rods, and a single-shot 1.5K option.

Typical Top-Loading (TL-4K) 4K refrigerator

Typical cooling and heating temperature curves Using a 1W@4.2K cold head, the minimum temperature: < 2.8K

Typical applications

Electricity, (near-field) optics, magnetism, DLTS, Mössbauer spectroscopy, neutron scattering, IR/THz, X-ray, high-pressure , high-energy, NMR, ESR/ EPR, materials stretching, low-dimensional materials, superconducting materials, quantum devices and microwave devices, etc. 

Top-loading TL-4K/1.5K (one-shot) refrigerator 

Valve body separated PT cryocooler, bottom and side windows mounted on the sample tube, integrated in-situ pressure-regulating sample rod.

Top-loading TL-4K/1.5K (single-shot) refrigerator

Integrated cold head suspension vibration dampening and linear actuator for 20 samples, designed for the detection of trace III-V impurities in silicon.

Example

Top-Loading Cryogenic High Pressure Electrical Test System

A top-loading cryogenic high pressure electrical test system was successfully installed at a southern university. The system utilizes a 4K cryocooler as the cooling source and provides a sample tube with an inner diameter of 55mm, which is filled with static exchange helium gas. The Top-loading design not only allows sufficient cooling of irregular samples, Diamond Anvil Cell, and samples with poor thermal conductivity, but also makes it particularly easy to change samples without having to shut down the compressor, which can be accomplished quickly by inserting and removing the sample rod, greatly improving the efficiency of the system. The system incorporates a turnkey low-temperature, high-pressure electrical test module that allows low-temperature, high-pressure electrical testing of stainless steel Diamond Anvil Cell in the<2.8K-300K temperature range.