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SD

Dilution Refrigerator Measurement System

The SD Dilution Refrigerator Measurement System is an affordable system with a fast turnaround time.

Highlights
Technical Specifications
Pulse Tubes
Options
Performance Graphs
Layout and Facility Requirements
Contact Sales

Fast Turnaround Dilution Refrigerator

To create a fast turnaround cryogenic refrigerator, we revived the form factor of our first cryogen-free dilution refrigerator measurement system. Our SD system delivers a cooldown time of < 12 hours, providing a cooling power of > 250 μW when operated at 100 mK.

The system requires no lab layout or on-site installation, and with the reduced step heat exchanger stage, the required amount of helium-3 is only 12 liters, making the system effective and affordable.

Product Highlights

1.0

SD

Dilution Refrigerator Measurement System

Fully Automated Operation

Fully automated cooldown sequence from room to base temperature, initiated with a single push of a button.

Effective Design

The dilution unit is positioned off-center to provide maximum useful experimental space on all flanges.

Compact Layout

The SD system has a compact layout as the Control Unit is integrated into the Gas Handling System and the dimensions of the system frame are only 1 410 mm by 1 000 mm. The system also doesn’t require a lab layout or on-site installation, but it’s still recommended for new customers.

Three Access Ports

  • 2 x KF40
  • 1 x KF25.

Superior Performance

  • Base temperature well below 30 mK
  • Fast cooldown: < 12 hours to 30 mK (measured on an empty system).

See all technical specifications

Temperature Controller

The Bluefors Temperature Controller enhances the user experience of our cryogenic systems. With a modern and intuitive user interface, you gain direct control and overview of the system’s temperature status. 

The Bluefors Temperature Controller is fully integrated to all dilution refrigerator measurement systems. 

Read more about the Temperature Controller

Low Total Cost of Ownership

Oil-free pumps and compressors in the Gas Handling System guarantee minimal maintenance requirements with service interval up to 3 years. The systems contain only high-quality components such as Pfeiffer Vacuum pumps and pressure sensors, VAT vacuum valves and bellows.

Gas Handling System & Control Software Generation 2

Services

Total System Care

Total System Care enables you to focus on your own work – doing research and measurements. The service ensures that systems operate at the best possible performance level and with maximal uptime, without users needing to spend time maintaining the systems themselves.

Learn more

Technical Specifications

2.0

SD

Dilution Refrigerator Measurement System

Note: Cooling power is measured from experimental flange outside the Mixing Chamber. Cooldown time to base temperature is measured from an empty system with standard experimental space and shield set.

SDGuaranteedExpected
Base temperature 30 mK25 mK
Cooling power at 100 mK250 μW275 μW
Cooling power at 120 mK360 μW400 μW
MXC Flange Diameter148 mm
Cooldown time to base
temperature		12 h11 h

Pulse Tube Cryocooler Configurations

3.0

SD

Dilution Refrigerator Measurement System

Cryomech Pulse Tube Cryocoolers with remote motors provide cryogenic cooling power to the dilution refrigerator measurement system without the need for liquid cryogens. The cooldown time of the system partly depends on the selected pulse tube power.

There are three pulse tube models available for the SD System: PT410-RM (default), PT415-RM, PT420-RM, and PT425-RM. The upgraded Pulse Tube models provide increased cooling power at the 4K Flange.

New: PT310-RM configuration is now available. Learn more here.

Options

4.0

SD

Dilution Refrigerator Measurement System

Frame Options

Additional Vibration Isolation

Additional Vibration Isolation

We offer improved vibration isolation for experiments that are particularly sensitive to low frequency vibrations (< 1 kHz).
Sound Isolation

Sound Isolation

Improved sound isolation for systems situated in spaces that require quieter work environments.

Shield options

Additional Radiation Shields

Additional Radiation Shields

We offer the possibility for additional electromagnetic shielding around the experimental space.
Magnetic Shielding

Magnetic Shielding

Magnetic shielding provides protection for samples from interference caused by magnetic fields.

Faster turnaround options

4K Heater

4K Heater

The 4K Heater is a fully automated fast warm-up option, which decreases the warm-up time for our cryogenic measurement systems.

Gas Handling System options

Industrial PC

Industrial PC

The high-performance industrial PC offers fully independent and versatile operation of the Bluefors dilution refrigerator measurement system.
Instrument Cart

Instrument Cart

The Instrument Cart can house supplementary equipment such as temperature controllers, power supplies, and rack-mounted electronics.
Redundant Main Circulation Unit

Redundant Main Circulation Unit

For added security, we offer a Redundant Main Circulation Unit to secure operation in atypical circumstances
Service Booster

Service Booster

The Service Booster is a dedicated turbomolecular pump for vacuum pumping, enabling more secure operation of the system.

Other options

Additional Sensors

Additional Sensors

Additional temperature sensors can be integrated into the system for comprehensive diagnostics and measurements.
Optical Access Ports

Optical Access Ports

Optical Access Ports offer direct line-of-sight access to the experimental space.

Performance Graphs

5.0

SD

Dilution Refrigerator Measurement System

1Start cooldown
2Start pulse pre-cooling
3Stop pulse pre-cooling
4Start mixture condensation
5Start mixture condensation
6Normal circulation mode

Above is a typical cooldown curve for a SD system measured with a calibrated resistance thermometer.

Pulse Pre-Cooling sequence is one of the key points in reducing the cooldown time (see spots 2 and 3). Because we do not use exchange gas, some parts of the dilution refrigerator unit stay ‘hot’ during cooldown, which prevents condensation of the helium3 –helium-4 mixture. To cool down these hot spots effectively, the mixture is repeatedly admitted from the tanks to the Still side of the dilution refrigerator to operate as an exchange gas and then pumped out again.

Services

Customer Care

We support our customers throughout the lifetime of their system, providing dedicated care to find solutions for any issues. Our technicians and engineers are ready to help you wherever you are located, with prompt service delivered either remotely or on-site.

Learn more

Related Products

Layout and Facility Requirements

6.0

SD

Dilution Refrigerator Measurement System

Layout Overview

Bluefors SD System layout overview
1. Thermometry Unit, 2. Gas Handling System, 3. Cryostat and its support frame, 4. Pulse Tube Cryocooler compressors.

Lightweight radiation shields and vacuum enclosure that are suitable for handling by one person. No lifting tools or crane required.

Facility Requirements

The basic requirements are 3-phase electricity, cooling water, and compressed air. The full list of requirements and specification details can be found in the Pre-Installation Guide, please contact our sales team for a copy.

See Also

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