L-TYPE RAPID

Super-fast Characterization Cryostat for sub-Kelvin and Kelvin Temperatures

L-TYPE RAPID

Super-fast Characterization Cryostat for sub-Kelvin and Kelvin Temperatures

Empower your team with a fully automatic and future-proof helium-3-free system

100 mK - 300 K

< 3 hours

300 mK

L-Type Rapid cryostat

Key Benefits

Speed up your development cycles with the fastest cryogenic characterization device on the market

Fast sample characterization

With the L-Type Rapid’s sample exchange mechanism you can prepare your sample outside the cryostat on a ‘Puck’ and load it in just a couple of minutes (there is no need to warm up the cryostat). After the low-temperature test is completed, samples can be removed easily, and within a few minutes the next sample, prepared on a spare Puck, can be loaded.

The entire process from installation and cooling to the base temperature takes less than three hours, therefore enabling high-throughput screening of scientific samples and rapid prototyping of quantum electronics.

Wide temperature range: 100 mK – 300 K

ADR systems are equipped with a heat switch to decouple the solid-state cooling medium from its pre-cooling stage during the demagnetization refrigeration process.

In the L-Type Rapid, the latter supports continuous operation at 300 mK and one-shot cooling down to 100 mK. The weak thermal link provided by the heat switch also enables heater-assisted continuous temperature sweeps from base to room temperature.

In contrast to typical He-based refrigerators, the L-Type Rapid offers simple access to a large temperature range, making additional equipment or accessories for working with very low temperatures obsolete.

Highly modular cooling platform

Take advantage of the versatility of a modular product by configuring the device for your specific use case.

Options include the integration of high-quality electronics in a variety of configurations, magnetic shielding, a 5 T sample magnet, Quantum Machines’ cryogenic control systems, and a large Puck 55.

Options and Components

Wiring and cryo-electronics

standard DC lines can be extended with several radio frequency lines equipped with multiple RF electronic components such as amplifiers, isolators, and low-pass filters used for the characterization of quantum devices

Magnetic shielding

to investigate and operate sensitive superconducting samples and quantum devices

5 Tesla sample magnet

smooth bipolar operation to study magnetic properties

Enhanced compatibility

Sample Puck 55

more space, lines and flexibility for your investigations of quantum devices and material samples

Performance Data

Fast and hassle-free operation

Fast sample cooldown

The cumbersome and time-consuming operation of large and complex refrigerators is a bottleneck in the development of novel functional materials as well as next-generation quantum devices. The L-Type Rapid, with its puck-based sample loader, offers a fast and automatic sample cooldown, increasing sample throughput and accelerating the screening of material samples and quantum devices.

The figure shows a typical time-temperature curve for our sample puck with a test device mounted, while cooling from room temperature to sub-Kelvin temperatures. In the initial 1.5 hours, the puck is cooled to the cryocooler base temperature. After the puck is fully thermalized, the ADR cooling units can be charged. This process takes approximately 1 hour. Subsequently the demagnetization cooling is started, and the system can be operated either continuously at temperatures as low as 300 mK, or at 100 mK for a limited hold time.

Apart from mounting the puck in the vacuum lock, the operation is automatic and can be controlled through a modern and intuitive instrument control software.

Cooldown Curve of the sample puck in an L-Type Rapid Cryostat

Continuous operation at 300 mK

Conventional adiabatic demagnetization refrigerators (ADR) allow only for “one-shot” cooling. By combining multiple ADR units, kiutra’s cryostats can provide both “one-shot” and additionally continuous sub-Kelvin cooling (cADR) independent of the supply with cryogens.

In its standard configuration, the L-Type Rapid uses two ADR units to generate continuous cooling. The figure shows the temperatures of both ADR units running in cADR mode at 300 mK. While the first unit cycles between the 4 K main heat bath (provided by the cryocooler) and a temperature below the target temperature, the second unit controls the sample temperature. As a result, the sample stage can maintain a constant temperature of 300 mK with a typical temperature stability <0.1 %, and a slightly reduced stability <2 % when activating its heat switch to initialize the regeneration.

Plot, showing the continuous operation of the L-Type Rapid Cryostat at 300 mK.

Scope of Supply

Cryostat

Sumitomo RP-082B2 closed-cyle pulsetube cryocooler, 1W 4.2K, 40 W @ 45 K
Sumitomo F70H water-cooled indoor helium compressor, 20 m flexlines
Two ADR units for one-shot and continuous operation:
  • 2 ADR magnets
  • 2 Heat switches
  • 2 Cooling media
Wide range pressure gauge
Integrated passive quench protection
User ports for custom integration:
  • 2 x ISO-F 100
  • 1 x ISO-KF 25

Instrument Control

Custom 19” electronics rack
kiutra Modular Control Unit (MCU):
  • Base Module
  • Power Module
  • Drive Module
  • 2x Load Module
  • Gas Handling Modul
kiutra Compressor Control Unit (CCU)
Temperature monitor
Temperature controller
Calibrated temperature sensor on sample stage
Temperature sensors on cryocooler cold stages and first ADR unit
Sample heater and warm-up heater
User PC with pre-configuration Python-based instrument control software and high-definition display
2x Digital high frequency magnet power supply
User breakout
Filtered temperature sensor breakout
Photo of the top of the L-Type Rapid cryostat showing the open sample loader and the sample cage inside

Standard Wiring

40 DC wires

Gas Handling

Pumping, purging and venting of cryostat and Sample Changer airlock chamber
Oil-free roughing pump
Turbomolecular pump

Sample Changer

Airlock Chamber with motorized sample transfer
Sample puck transfer cage
Additional pressure gauge
1 Sample Puck
1 Sample Puck Testing Station
ISO-F 100 Gate Valve

Specs

System size (cm)
(w x l x h)
cryostat (sample changer open)
rack
compressor
94 x 94 x 232
60 x 80 x178
45 x 53 x 63
System weight (kg)cryostat< 600
Residual field at sample stage (mT)< 0.05 (0.5 Gauss, 50 µT)
Vibration (µm)< 10 µm
Size of Sample Puck (mm)diameterø 36
Sample cooldown time (hours)300 K – 4K
4 K – 0.1 K
total 300 K – 100 mK
< 1.5
1.5
< 3
Cooldown time (hours)cryostat< 42
Temperature range (K)0.1 – 300
Continuous temperature control (K)0.3 – 300
Cooling power (µW)@500 mK
@ 1K
50
160
Operation time (hours)@100 mK
@200 mK
3
5
Temperature stabilitytypical
while switching stages
< 0.1 % or <0.5 mK
< 2 %

Sample Loading Video

Have a look at the fast and convenient sample loading process with the L-Type Rapid

Typical Applications

Innovative cooling for state-of-the-art science and technology

Qubits

With first concepts dating back to the 1980s, superconducting circuits are today one of the most promising technologies in the race to build a universal quantum computer. The key element in superconducting quantum circuits is the Josephson junction – a non-linear element that connects two superconducting islands by a weak link, which can be either an insulating or a metallic barrier. Superconducting quantum circuits offer individual control and readout, and their properties can be engineered by circuit design. During the past two decades, superconducting qubits experienced a rapid improvement of their coherence properties, resulting in the demonstration of several major milestones toward scalable quantum computing. To screen and characterize superconducting thin films and devices more efficiently, kiutra’s L-Type Rapid offers an extremely fast sample cooldown, combined with a large temperature range, and a base temperature as low as 100 mK.  

Schematic depiction of a Q-Bit State in an Energy Diagram and as an electronic circuit
schematid depticion of a race-track memory

Spintronic Devices

Researchers in the field of spintronics study and exploit the spin-charge coupling in metallic systems. Making use not only of the charge carriers’ charge but also of their spin allows, e.g., to build novel devices like racetrack memory or MRAM to save digital data. These technologies promise low-energy information storage, high reliability, performance, and capacity also at room temperature. However, to better understand the underlying physics and to develop novel materials for spintronic devices, low temperatures, high-frequency cabling, and magnetic field control at the sample position are required. The L-Type Rapid offers access to a wide temperature range from 100 mK to room temperature in a single, cryogen-free, and easy-to-use instrument. Optional upgrades such as a sample magnet, and additional RF and DC wiring allow to implement various experimental setups and low-temperature measurements.

Do you need further information?

Our team has extensive experience in many fields of low-temperature research. We are keen to learn more about your requirements and support you in finding your optimal cooling solution.
Get our brochure with the benefits and key specifications of the L-Type Rapid.

PUCK 55

Get More Flexibility for your Research with a Larger Puck

PUCK 55

Get More Flexibility for your Research with a Larger Puck

As the platform where you mount your samples and experimental devices, the Puck is an essential component of an L-Type Rapid system. Once a device is prepared, the Puck is loaded and unloaded into the cryostat using the Automatic Sample Loader. Users are guided through the process by an intuitive graphical interface, and the typical interaction time is less than 5 minutes.

Puck 55

More possibilities, more discoveries

More sample space

diameter 55 mm

height 100 mm

Puck 55 for the L-Type Rapid cryostat

More lines

The Puck 55 allows the use of 48 DC lines and 12 RF lines up to 18 GHz.

Puck 55 for the L-Type Rapid cryostat with wires

More compatibility

The sample space on Puck 55 is more than double the previous volume, with a diameter of 55 mm and a height of 100 mm, fully covered by a radiation shield.

Due to its size, it is now compatible with the QCage.24 and QBoard-II sample holders by Quantum Machines, suited for the investigation of spin-qubit and superconducting quantum devices.

Puck 55 for the L-Type Rapid cryostat with shielding

Do you need further information?

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Our team is experienced in many fields of low-temperature research. We are happy to learn more about your requirements and support you in finding your optimal cooling solution.

S-TYPE OPTICAL

Resources

S-TYPE OPTICAL

Resources

Sample Loading Process

How to attach the Sample Changer to the Sample Cage

S-Type Optical Sample Cage & Sample Changer
Sample Cage (left) & Sample Changer
S-Type Optical Sample Cage & Sample Changer assembled
Cage & Changer Assembled

Place the Sample Cage on top of the Puck Station and assemble the two modules by screwing the black screw inside the threaded brass part. After a few rotations, the outer feet (2) of the Sample Changer are stopped by the legs of the brass ring (4) of the Sample Cage.

Now it’s important to align the two parts correctly, so that the legs will stay in place. This can be verified by trying to rotate the sample cage after inserting the screw halfway in. The Cage and the Changer are assembled right, if the legs of the brass ring (4) are aligned and guided by the feet of the Changer (2)

If the alignment of both parts is correct, insert the screw further until the end stop. Loosen the screw a bit so the Sample Cage is not jamming inside of the Sample Changer.

Once the Sample Changer is mounted on the Sample Cage, both are inserted into the cryostat. There is a white ceramic pin mounted on the Sample Cage. This pin must be oriented facing the user. Although the orientation of the Sample Changer and Sample Cage is symmetrically designed in 120° steps, it is recommended to align the kiutra logo (3) together with the white pin (5) towards the front, as it gives a good indication of where the front is.

Instruction Videos

Opening

Sample loading

Sample removal

Do you need further information?

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Our team has extensive experience in many fields of low-temperature research. We are keen to learn more about your requirements and support you in finding your optimal cooling solution.

S-TYPE ESSENTIAL

Fully Integrated Cooling Solution

S-TYPE ESSENTIAL

Fully Integrated Cooling Solution

The S-Type Essential is a fully integrated 19’’ rack mounted cryogenic platform for the continuous, cryogen-free cooling of quantum devices. In its standard configuration, the system provides continuous cooling at 300 mK and “one-shot” operation down to 100 mK – independent of the supply with cryogens.

down to 100 mK

Ø > 140 mm

300 mK

Front of S-Type Essential fully integrated cooling solution.

Key Benefits

Built for maximum design flexibility, even below 1 K

Versatile cryogenic platform

Despite its compact size the S-Type Essential features a large sample platform to accommodate complex user setups or multiple electronic devices. The System can be easily adapted to integrate, e.g., special wiring, fiber-optics, or custom setups.

Continuous and cryogen-free sub-Kelvin cooling

In its standard configuration, the S-Type Essential features a combination of two ADR units that provide continuous, cryogen-free cooling at temperatures as low as 300 mK. Additionally, both units can be operated in “one-shot” mode to reach temperatures as low as 100 mK for a limited hold time. Both in continuous and “one-shot” mode, the cooling process is automatic and can be controlled through our intuitive graphical user interface. As operation is largely automated, the system does not require special expertise..

Fully integrated cooling solution

The most prominent feature of the S-Type Essential is its full integration in a 19’’ rack, with the cryostat mounted in the lower compartment, and the control electronics in the upper part of the rack. Additionally, the upper part offers enough space to accommodate typical user electronics, so that the complete system will not take up more space in your lab than absolutely necessary. The combination of closed-cycle and magnetic cooling ensures particularly quiet and largely automated system operation, requiring only minimal maintenance.

 

Typical Applications

Innovative cooling for state-of-the-art science and technology

Superconducting Nanowire Single-Photon Detectors (SNSPD)

Cryogenic nanowire detectors are among the most efficient photon detectors available today. They are useful for various applications in metrology, imaging, and communication, including also future fiber-based quantum key distribution networks. SNSPD must be operated well below their superconducting critical temperature of typically several Kelvin. They will benefit from even lower temperatures particularly at the telecom and longer wavelengths. Detector cooling and related applications will benefit from unsupervised long-term cryostat operation, as the S-Type Essential provides continuous cryogen-free sub-Kelvin cooling through a robust magnetic refrigeration process. Despite its small footprint the S-Type Essential offers a large sample stage. It can easily accommodate and operate multiple fiber-coupled detectors and related low-temperature wiring and electronics. Its compact size allows to mount the cryostat in a 19” rack, making it an ideal choice for integrated sensing and communication applications.

Schematic Graphic of a superconducting Nanowire Single-Photon Detector (SNSPD)
Schematic deptiction of a diamond pressure cell

High-Pressure Measurements

Materials with strong electronic correlations are often susceptible to the application of pressure. Using high-pressure techniques like piston-cylinder or Bridgman cells, physical properties such as the magnetization, susceptibility, and resistivity can be studied as a function of temperature, magnetic field, and pressure. This allows to map out complex phase diagrams, to tune materials towards low-temperature electronic instabilities, and to investigate their behavior in the proximity of a phase transition. The L-Type Rapid is a fast-cooling cryostat and therefore ideally suited to study pressure cells, where the pressure must be changed frequently and ex-situ. The sample puck used in its sample loader offers enough space to mount different high-pressure clamp cells. More complex experimental setups that require, e.g., gas-activated cells for in-situ changes of the pressure or in-situ pressure determination using ruby fluorescence can be implemented using the S-Type Essential. It offers a large sample platform and can be easily adapted by the user to meet their individual requirements.

Performance Data

Continuous solid-state cryogenic cooling

Continuous operation at 300 mK

Conventional adiabatic demagnetization refrigerators (ADR) allow only for “one-shot” cooling. By combining multiple ADR units, kiutra’s cryostats can provide both “one-shot” and additionally continuous sub-Kelvin cooling (cADR) independent of the supply with cryogens. In its standard configuration, the S-Type Essential uses two ADR units to generate continuous magnetic cooling. The figure shows the temperatures of both ADR units running in cADR mode at 300 mK. While the first unit cycles between the 4 K main heat bath (provided by the cryocooler) and a temperature below the target temperature, the second unit controls the sample temperature. As a result, the sample stage can maintain a constant temperature of 300 mK with a typical temperature stability <0.1 %, and a slightly reduced stability <2 % when activating its heat switch to initialize the regeneration.

Graph showing the continuous operation of the S-Type Essential Cryostat at 300 mK.

Cooling power

A detailed knowledge of the cooling performance of a system is essential for the realization of cryogenic applications. This graph shows the cooling power of the S-Type Essential, measured at the sample platform with the standard 24 lines DC wiring, sample heater, and thermometer installed.

Graph showing the cooling power of the S-Type Essential Cryostat as a function of temperature

Scope of Supply

Cryostat

Sumitomo RP-082B2 closed-cyle pulsetube cryocooler, 1W 4.2K, 40 W @ 45 K
Sumitomo F70H water-cooled indoor helium compressor, 20 m flexlines
Two ADR units for one-shot continuous operation:
  • 2 ADR magnets
  • 2 Heat switches
  • 2 Cooling media
Wide range pressure gauge
Integrated passive quench protection

Instrument Control

kiutra Modular Control Unit (MCU):
  • Base Module
  • Power Module
  • Drive Module
  • 2x Load Module
kiutra Compressor Control Unit (CCU)
Temperature monitor & controller
Calibrated temperature sensor on sample stage
Temperature sensors on cryocooler cold stages and first ADR unit
Sample heater and warm-up heater
User PC with pre-configuration Python-based instrument control software and high-definition display
2 x Digital high frequency magnet power supply
User breakout
Filtered temperature sensor breakout
Photograph of the electronics part and the cryostat housing of the S-Type Essential Cryostat.

Specs

This system is currently being developed and tested. It will become available approximately in Q4/22. The specifications listed here are preliminary specifications expected to be reached and will be updated once the system is out of the development phase.

System size (cm)
(w x l x h)
cryostat & electronics
compressor
80 x 210 x 80
54 x 45 x 50
System weight (kg)cryostat & electronics< 750
Size of sample platform (mm)diameter
height
>140
>50
System cooldown time (hrs)32
Continuous operation (K)0.3
Cooling power (µW)@ 500 mK
@ 1K
>50
>160
Operation time (hrs)@100 mK3 hours
Temperature stabilitytypical
while switching stages
< 0.1 %
< 2 %

Available Options

Up to 4 optical fibers

to run detectors or photon sources

Up to 16 RF lines

and up to 48 DC lines

Picture of RF and DC wiring in the cryostat S-Type Essential cryostat

Do you need further information?

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Our team has extensive experience in many fields of low-temperature research. We are keen to learn more about your requirements and support you in finding your optimal cooling solution.

S-TYPE OPTICAL

Rack-integrated sub-Kelvin Cryostat with Free-beam Access

S-TYPE OPTICAL

Rack-integrated sub-Kelvin Cryostat with Free-beam Access

The platform for optical quantum technologies and material science 

300mK

ø > 20 mm

3 T || optical axis

Photo showing the front of the S-Type Optical cryostat.

Key Benefits

The S-Type Optical is a versatile optical cryostat featuring an experimental environment with ultra-low vibrations

Optical access

Expand your optical investigations into the sub-Kelvin temperature regime with large free-beam access down to the mK stage in a vertical direction.

Proprietary cryogenic interface

Easily prepare your low-temperature setup outside the cryostat with our proprietary sample exchange mechanism.

Continuous and cryogen free operation

Continuous operation at 300 mK independent of helium-3 supply.

Compact platform

Make more room in your lab with space-saving compact 19” rack integration.

Modular design

Take advantage of a highly modular system and configure your device for your specific use case using magnets, wiring, fibers, positioners and more.

Typical Applications

Innovative cooling for state-of-the-art science and technology

Optical investigation of electronic correlations

The investigation of many-particle correlations, their impact on the bulk properties and transport behavior of condensed matter, and how these correlations trigger the emergence of new and exotic phases is a particularly exciting and active field of research. Several measurements including Rayleigh (elastic), Raman (inelastic), or resonant inelastic light scattering can be used to study collective excitations of the solid state. For such investigations, typically low temperatures in combination with fiber-coupled or free-beam optical access are needed. These requirements are met by kiutra’s S-Type Optical, which offers a unique combination of sub-Kelvin temperatures, free-beam optical access, small working distance, and compact system size to enable various optical measurements.

Schematic depiction of an optical experiment
Generic graph of the spectrum of an arbitrary material collected in low-temperature photoluminecence.

Low-temperature photoluminescence

The investigation of photo-physical properties yields insights into electronic correlations of lower-dimensional systems or heterostructures. A well-established spectroscopic technique is the observation of photoluminescence, i.e., the analysis of light that is emitted from a sample after the absorption of photons. Tracking characteristic features in the photoluminescence spectra over a broad temperature range provides additional information on the energy scales and correlations of the electronic structure.

Cryogen-free continuous operation through cADR

In its standard configuration, the S-Type Optical uses two ADR units to generate continuous magnetic cooling (cADR).

The top figure shows the temperature of the ADR units running in continuous mode at 300 mK. While the assisting ADR unit cycles between the 4 K main heat bath (provided by the cryocooler) and a temperature below the target temperature, the second unit controls the sample temperature. As a result, the sample stage can maintain a constant temperature of 300 mK with a typical temperature stability of less than 0.1%, and slightly reduced stability of 4% when activating its heat switch (HS) to initialize the regeneration.

The bottom figure shows the temperature control, stepping the sample stage temperature between 200 mK and 1.5 K.

The top figure shows the temperature of the ADR units running in continuous mode at 300 mK. The bottom figure shows the temperature control, stepping the sample stage temperature between 200 mK and 1.5 K.

Specs

System size (w x l x h)cryostat & electronics
compressor
94 x 94 x 208 cm
54 x 45 x 50 cm
Weightcryostat &
electronics
< 600 kg
Cooldown  cryostat time 32 hrs 
Available sample 
space 
diameter 
height 
47 mm 
100 mm 
Temperature stabilitytypical 
switching HS 
< 0.1%
< 4%  
Cooling power  @300 mK 
@1 K 
15 μW 
250 μW 
Free-beam access  diameter > 20 mm 
Vibration @1500 Hz 
switching HS 
< 200 nm 
< 1.5 μm 

Available Options

3 T sample magnet

smooth bipolar operation to study magnetic properties

Wiring 

40 DC and up to 4 RF to the sample stage 

Do do you need further information?

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Our team is experienced in many fields of low-temperature research. We are happy to learn more about your requirements and support you in finding your optimal cooling solution.
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View video clips of how to easily load and remove samples.  

L-TYPE RAPID

Super-fast Characterization Cryostat for sub-Kelvin and Kelvin Temperatures

L-TYPE RAPID

Super-fast Characterization Cryostat for sub-Kelvin and Kelvin Temperatures

Empower your team with a fully automatic and future-proof helium-3-free system

100 mK - 300 K

< 3 hours

300 mK

L-Type Rapid cryostat

Key Benefits

Speed up your development cycles with the fastest cryogenic characterization device on the market

Fast sample characterization

With the L-Type Rapid’s sample exchange mechanism you can prepare your sample outside the cryostat on a ‘Puck’ and load it in just a couple of minutes (there is no need to warm up the cryostat). After the low-temperature test is completed, samples can be removed easily, and within a few minutes the next sample, prepared on a spare Puck, can be loaded.

The entire process from installation and cooling to the base temperature takes less than three hours, therefore enabling high-throughput screening of scientific samples and rapid prototyping of quantum electronics.

Wide temperature range: 100 mK – 300 K

ADR systems are equipped with a heat switch to decouple the solid-state cooling medium from its pre-cooling stage during the demagnetization refrigeration process.

In the L-Type Rapid, the latter supports continuous operation at 300 mK and one-shot cooling down to 100 mK. The weak thermal link provided by the heat switch also enables heater-assisted continuous temperature sweeps from base to room temperature.

In contrast to typical He-based refrigerators, the L-Type Rapid offers simple access to a large temperature range, making additional equipment or accessories for working with very low temperatures obsolete.

Highly modular cooling platform

Take advantage of the versatility of a modular product by configuring the device for your specific use case.

Options include the integration of high-quality electronics in a variety of configurations, magnetic shielding, a 5 T sample magnet, Quantum Machines’ cryogenic control systems, and a large Puck 55.

Options and Components

Wiring and cryo-electronics

standard DC lines can be extended with several radio frequency lines equipped with multiple RF electronic components such as amplifiers, isolators, and low-pass filters used for the characterization of quantum devices

Magnetic shielding

to investigate and operate sensitive superconducting samples and quantum devices

5 Tesla sample magnet

smooth bipolar operation to study magnetic properties

Enhanced compatibility

Sample Puck 55

more space, lines and flexibility for your investigations of quantum devices and material samples

Performance Data

Fast and hassle-free operation

Fast sample cooldown

The cumbersome and time-consuming operation of large and complex refrigerators is a bottleneck in the development of novel functional materials as well as next-generation quantum devices. The L-Type Rapid, with its puck-based sample loader, offers a fast and automatic sample cooldown, increasing sample throughput and accelerating the screening of material samples and quantum devices.

The figure shows a typical time-temperature curve for our sample puck with a test device mounted, while cooling from room temperature to sub-Kelvin temperatures. In the initial 1.5 hours, the puck is cooled to the cryocooler base temperature. After the puck is fully thermalized, the ADR cooling units can be charged. This process takes approximately 1 hour. Subsequently the demagnetization cooling is started, and the system can be operated either continuously at temperatures as low as 300 mK, or at 100 mK for a limited hold time.

Apart from mounting the puck in the vacuum lock, the operation is automatic and can be controlled through a modern and intuitive instrument control software.

Fast sample cooldown

Continuous operation at 300 mK

Conventional adiabatic demagnetization refrigerators (ADR) allow only for “one-shot” cooling. By combining multiple ADR units, kiutra’s cryostats can provide both “one-shot” and additionally continuous sub-Kelvin cooling (cADR) independent of the supply with cryogens.

In its standard configuration, the L-Type Rapid uses two ADR units to generate continuous cooling. The figure shows the temperatures of both ADR units running in cADR mode at 300 mK. While the first unit cycles between the 4 K main heat bath (provided by the cryocooler) and a temperature below the target temperature, the second unit controls the sample temperature. As a result, the sample stage can maintain a constant temperature of 300 mK with a typical temperature stability <0.1 %, and a slightly reduced stability <2 % when activating its heat switch to initialize the regeneration.

Continuous operation

Scope of Supply

Cryostat

Sumitomo RP-082B2 closed-cyle pulsetube cryocooler, 1W 4.2K, 40 W @ 45 K
Sumitomo F70H water-cooled indoor helium compressor, 20 m flexlines
Two ADR units for one-shot and continuous operation:
  • 2 ADR magnets
  • 2 Heat switches
  • 2 Cooling media
Wide range pressure gauge
Integrated passive quench protection
User ports for custom integration:
  • 2 x ISO-F 100
  • 1 x ISO-KF 25

Instrument Control

Custom 19” electronics rack
kiutra Modular Control Unit (MCU):
  • Base Module
  • Power Module
  • Drive Module
  • 2x Load Module
  • Gas Handling Modul
kiutra Compressor Control Unit (CCU)
Temperature monitor
Temperature controller
Calibrated temperature sensor on sample stage
Temperature sensors on cryocooler cold stages and first ADR unit
Sample heater and warm-up heater
User PC with pre-configuration Python-based instrument control software and high-definition display
2x Digital high frequency magnet power supply
User breakout
Filtered temperature sensor breakout
Photo of the top of the L-Type Rapid cryostat showing the open sample loader and the sample cage inside

Standard Wiring

40 DC wires

Gas Handling

Pumping, purging and venting of cryostat and Sample Changer airlock chamber
Oil-free roughing pump
Turbomolecular pump

Sample Changer

Airlock Chamber with motorized sample transfer
Sample puck transfer cage
Additional pressure gauge
1 Sample Puck
1 Sample Puck Testing Station
ISO-F 100 Gate Valve

Specs

System size (cm)
(w x l x h)
cryostat (sample changer open)
rack
compressor
94 x 94 x 232
60 x 80 x178
45 x 53 x 63
System weight (kg)cryostat< 600
Residual field at sample stage (mT)< 0.05 (0.5 Gauss, 50 µT)
Vibration (µm)< 10 µm
Size of Sample Puck (mm)diameterø 36
Sample cooldown time (hours)300 K – 4K
4 K – 0.1 K
total 300 K – 100 mK
< 1.5
1.5
< 3
Cooldown time (hours)cryostat< 42
Temperature range (K)0.1 – 300
Continuous temperature control (K)0.3 – 300
Cooling power (µW)@500 mK
@ 1K
50
160
Operation time (hours)@100 mK
@200 mK
3
5
Temperature stabilitytypical
while switching stages
< 0.1 % or <0.5 mK
< 2 %

Sample Loading Video

Have a look at the fast and convenient sample loading process with the L-Type Rapid

Typical Applications

Innovative cooling for state-of-the-art science and technology

Qubits

With first concepts dating back to the 1980s, superconducting circuits are today one of the most promising technologies in the race to build a universal quantum computer. The key element in superconducting quantum circuits is the Josephson junction – a non-linear element that connects two superconducting islands by a weak link, which can be either an insulating or a metallic barrier. Superconducting quantum circuits offer individual control and readout, and their properties can be engineered by circuit design. During the past two decades, superconducting qubits experienced a rapid improvement of their coherence properties, resulting in the demonstration of several major milestones toward scalable quantum computing. To screen and characterize superconducting thin films and devices more efficiently, kiutra’s L-Type Rapid offers an extremely fast sample cooldown, combined with a large temperature range, and a base temperature as low as 100 mK.  

Schematic depiction of a Q-Bit State in an Energy Diagram and as an electronic circuit
schematid depticion of a race-track memory

Spintronic Devices

Researchers in the field of spintronics study and exploit the spin-charge coupling in metallic systems. Making use not only of the charge carriers’ charge but also of their spin allows, e.g., to build novel devices like racetrack memory or MRAM to save digital data. These technologies promise low-energy information storage, high reliability, performance, and capacity also at room temperature. However, to better understand the underlying physics and to develop novel materials for spintronic devices, low temperatures, high-frequency cabling, and magnetic field control at the sample position are required. The L-Type Rapid offers access to a wide temperature range from 100 mK to room temperature in a single, cryogen-free, and easy-to-use instrument. Optional upgrades such as a sample magnet, and additional RF and DC wiring allow to implement various experimental setups and low-temperature measurements.

Do you need further information?

Our team has extensive experience in many fields of low-temperature research. We are keen to learn more about your requirements and support you in finding your optimal cooling solution.
Get our brochure with the benefits and key specifications of the L-Type Rapid.