Ultra Fast Cooldown
Less than 3 hours default
... Even Faster Warm-Up
About 1 hour up to RT
Low Base Temperature
< 10 mK for Pro version
< 30 mK for Eco version
Closed He-4 Cycle
Laborious refilling redudant
High Cooling Power
Up to 300 µW at 100 mK
Watts at 4.5 K
One button cooldown /
Quick setup adaption
170 mm in diameter
150 mm height
Flexible I/O Cabling
Variety of connectors
Comfortable sample access
Coaxial Wiring L
18 semi-rigid coax
Attenuators at 4K, 1K and mK
Space for >30 semi-rigid coax
Sionludi L Dilution Fridge
Configured for superconducting
and semiconductor qubits.
The Sionludi is a compact tabletop closed-cycle dilution refrigerator with milli-Kelvin base temperature. The term tabletop is meant to be understood literally. Its unconventional layout enables a direct installation of the cryostat on a simple table. This makes the everyday operation very convenient and reduces the space requirement for the cryostat.
The cryostat exhibits a modular design which enables the installation of different components such as low frequency and RF wiring, passive RF devices, optical fibers and more. Three removable access ports at each temperature stage and six demountable windows at the vacuum shield allow a simple exchange of experimental equipment.
Vibrations are usually an undesired source of troubles. The small height and stiff support structure of the cryostat makes it very insusceptible to vibrations. Unavoidable sources of vibrations such as vacuum and circulation pumps are mechanically decoupled from the cryostat.
The complete cooldown, warm-up and intermediate states are automatized one-button operations. General control of the cryostat is enabled by an elaborated platform-independent web interface. The interface also provides the ability to adjust the operation on the interactive user interface as well as write and read parameters with external ethernet interfaces such as Python or MATLAB.
Large Experimental Space
Despite its compact size, the Sionludi L offers a large experimental volume at base temperature. The default experimental volume has a diameter of 170mm and a default height of 150mm. If necessary, its upside-down design allows a straightforward increase of the experimental height. Even more experimental space is provided by its bigger brother, the Sionludi XL.
|Base temperature, Pro-10||10 mK||< 9 mK|
|Base temperature, Eco||30 mK||< 25 mK|
|Total cooldown time||3 hours ||3 hours|
|Total warm-up time||1.5 hours||1 hour|
|Cooling power at 4.5 K||approx. 0.5 W||> 0.5 W|
|Cooling power at 100 mK||250 µW||300 µW|
|Cooling power at 30 mK, Pro-10||20 µW||30 µW|
 Exact cooldown time depends on the thermal load at different stages caused by the installed equipment and the total amount of LHe4 available at the start.
Illustrated is the fast heating and cooling. The heating powers are indicated in micro-Watts. After heating, the temperature decreases rapidly down to base temperature. All measurements were taken in a Sionludi L Eco cryostat, equipped with 18 RF-cables down to the cold plate.