LD
Dilution Refrigerator Measurement System
The LD System is our most sold dilution refrigerator measurement system. Its versatility makes it suitable for many different experimental needs.
The LD System has the largest amount of available options and different magnet configurations that allow it to be customized for different experiments and uses.
The LD400 system typically provides more than 15 μW at 20 mK on the experimental flange with only 18 liters of helium-3. In addition, it has a high cooling power of ∼ 0.5 mW when operated at 100 mK.
This well-engineered dilution refrigerator measurement system has a clean and open design for installing measurement equipment. A single push of a button initiates a fully automated cooldown sequence from room to base temperature.
Gas Handling System & Control Software Generation 2
Product Highlights
1.0
LD
Dilution Refrigerator Measurement System
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.
Technical Specifications
2.0
LD
Dilution Refrigerator Measurement System
Pulse Tube Cryocooler Configurations
3.0
LD
Dilution Refrigerator Measurement System
Options
4.0
LD
Dilution Refrigerator Measurement System
Performance Graphs
5.0
LD
Dilution Refrigerator Measurement System
Above are cooldown curves for three different configurations of LD systems measured with calibrated resistance thermometers.
- System 1: basic LD with LN2 pre-cool
- System 2: basic LD
- System 3: LD with 100 mm extra sample space, Mixing Chamber shield, additional sample mounting plate, and large amount of DC and RF cabling.
The 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’ on cool down, 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.
Related Products
Layout and Facility Requirements
6.0
LD
Dilution Refrigerator Measurement System
Layout Overview
1. Cryostat and its support frame, 2. Gas Handling System, 3. Pulse Tube Cryocooler compressors, 4. Control Unit
Each of our systems is designed to be installed to a specific location defined in advance. A separate layout drawing is made for each Bluefors system, which should always be referred to for exact dimensions.
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.
