SD

Dilution Refrigerator Measurement System

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

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.

Gas Handling System & Control Software Generation 2

Gas Handling System Generation 2

Our new Gas Handling System delivers next-level control with unprecedented ease-of-use, class-leading safety and enhanced reliability.

Control Software Generation 2

Control Software Generation 2 completely redefines the experience of controlling cryogenic measurement systems.

Product Highlights

1.0

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.

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.

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.

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Technical Specifications

2.0

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 sample space and shield set.

SD	Guaranteed	Expected
Base temperature	30 mK	25 mK
Cooling power at 100 mK	250 μW	275 μW
Cooling power at 120 mK	360 μW	400 μW
MXC Flange Diameter	148 mm
Cooldown time to base temperature	12 h	11 h

Pulse Tube Cryocooler Configurations

3.0

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

Dilution Refrigerator Measurement System

Performance Graphs

5.0

Dilution Refrigerator Measurement System

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. 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.

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Layout and Facility Requirements

6.0

Dilution Refrigerator Measurement System

Layout Overview

1. Cryostat and its support frame, 2. Pulse Tube Cryocooler compressors, 3. Control Unit, 4. Gas Handling System.

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.

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Total System Care

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SD

Fast Turnaround Dilution Refrigerator