Our most recent iteration of the mini-dilutor, tested on a powerful single-shot He7 precooler, achieved a base temperature of around 65mK. We are currently testing whether this dilution module will run satisfactorily with a continuous CC7 precooler. We hope that it will run at 100mK under at least 3µW of applied power. There should be
Please watch our videos online to understand how our coolers work. Our continuous sub-Kelvin sorption coolers are designed to run from a PTC or GM type mechanical cryocooler. The continuous cooler has two sets of modules alongside a condenser module. A CC4 has two sets of GL4 modules, and a CC7 has two sets of
Click here to view "Work below 300mK", a video about how the GL7 works. The GL7 has a mainplate that interfaces to the cold head of a mechanical cryocooler. The GL4 has just one module, whereas the GL7 has two. The larger of the modules contains Helium-4, and the smaller module contains Helium-3. The GL7
Our sorption coolers are quite small and we are actively working to minimise the thermal load imposed on the 4K cryocooler stage. We aim to keep the cryocooler thermal demand to a minimum. An RDK101 with 100/160mW of cooling power is adequate for a GL4 or small GL7. For a CC4/7 a PT 405 or
There are a number of ways to interface a CRC cryocooler into your cryostat, depending on your experiment and cryostat design. The picture on the right below shows a cryostat with a GM cooler mounted to one side and the CRC cryocooler mounted through the 4K plate. The pumps are in the 40K space,
Have a look at our page about interfacing, there are several options on how to support our sorption coolers. Depending on which option you select, you may need a radiation shield around the hot pumps. This will also determine where the electrical connector will be best situated - either on the ‘hot’ or the ‘cold’
Regarding the matter of sample mounting and support, we would not generally recommend mounting directly onto the sorption cooler. We normally suggest that the sample be mounted onto a separate ‘cold table’ with thermal contact to the sorption cooler by means of a heat strap. This decouples the mechanical support from the thermal linkage, bringing
We supply our coolers with the temperature sensors and heaters wired to a micro-D connector fixed on the cooler. (We can send the datasheet for the Glenair connectors we use). A GL7 has a 25-way MDM, and a GL4 has a 21-way MDM. The end user will need to either make or buy the cables
Our sorption coolers aren’t designed to have large masses hung from them. If you need to hang small to moderate masses, it is strongly recommend using a separate cold table to mount the object being cooled. Torsion, bending or non-axial loads will break any of our coolers.
Our sorption coolers should be used with the cold head vertically downwards i.e. at the bottom. However, the coolers can be operated up to 45 degrees to the vertical, once they are cold.