sionludi XL

Product Overview | Specifications | Options

Sionludi XL No Shields
Sionludi XL Specifications
Sionludi XL Modular Design
Sionludi XL Full Size
Sionludi XL Coaxial Wiring
Sionludi XL
Sionludi L Shields

Fast Cooldown

Less than 7 hours default

... Even Faster Warm-Up

About 2 hours up to RT

Low Base Temperature

Closed He-4 Cycle

Laborious refilling redudant

High Cooling Power

Up to 300 µW at 100 mK

Watts at 4.5 K

Turnkey Operation

One button cooldown /


Sionludi XL Modularity

Compact Design

Highly economical

Low vibrations

Removable Ports

Quick setup adaption

Easy modification

Vast Experimental Space

295 mm in diameter

300 mm height

Flexible I/O Cabling

Twelve windows

Variety of connectors

Sionludi XL Modularity

Sionludi XL Dilution Fridge

Configured for superconducting
and semiconductor qubits

Sionludi XL Modularity

Coaxial Wiring in XL

15 semi-rigid coax installed

Attenuators at 4K, 1K and mK

Space for >100 semi-rigid coax

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Title Sionludi XL


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.

Application Notes
Sionludi XL Modular Design Drawing

High Modularity

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 twelve demountable windows at the vacuum shield allow a simple exchange of experimental equipment.

Low Vibrations

Vibrations are usually an undesired source of troubles. The small height, heavy mass, 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.

Turnkey Operation

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.

Vast Experimental Space

Despite its compact size, the Sionludi XL offers a large experimental volume at base temperature. The default experimental volume has a diameter of 295mm and a height of 300mm. If necessary, its upside-down design allows a straightforward increase of the experimental volume height. A more compact and economical version is its little brother, the Sionludi L.

Sionludi XL Dimensions


Guaranteed [1]Expected
Base temperature, Pro-1010 mK< 9 mK
Base temperature, Eco30 mK< 25 mK
Total cooldown time7 hours [2]6 hours
Total warm-up time2 hours1.5 hours
Cooling power at 4.5 Kapprox. 0.5 W> 0.5 W
Cooling power at 100 mK250 µW300 µW
Cooling power at 30 mK, Pro-1020 µW30 µW
[1] All guaranteed specifications are approved right before delivery by test cooldowns.
[2] 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.