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XLDHesl

Measurement System

The XLDHesl Measurement System is designed for the most demanding experiments conducted at 1 K or 0.5 K temperatures.

Highlights
Technical Specifications
Options
Layout and Facility Requirements
Contact Sales

The XLDHesl Measurement System is designed for demanding experiments conducted at 1 K or 0.5 K temperatures. The base temperatures depend on the helium isotopes used, with 1 K achieved using helium-4, and 0.5 K achieved with helium-3.

The measurement system features a large experimental space, and provides the same extensive wiring capabilities as the Bluefors XLDsl Dilution Refrigerator Measurement System it is based on.

There are two different models of the system: XLD400Hesl and XLD1000Hesl. The key difference between these systems is the Gas Handling System used.

Superconducting magnets can be easily integrated into the XLDHesl, and the system can be upgraded to a Dilution Refrigerator Measurement System at any later stage.

Product Highlights

1.0

XLDHesl

Measurement System

High, Continuous Cooling Power 

The main advantage of the XLDHEsl System is its robust Gas Handling System that provides high and continuous cooling power to the system.

The system can be operated with either helium-3 or helium-4 gas isotopes. The typical base temperature, below 500 mK, is easily achievable with 7 liters of helium-3 as an operational gas. Temperatures below 900 mK are achievable with helium-4. 

Fast Exchange of Wiring with Side-Loading

The side-loading feature allows wiring assembly work for the installation set flanges to be performed on a workbench away from the cryostat. Consequently, the preparation of a wiring assembly or a full experiment can be performed while the system is running. When the system is warmed up to room temperature, the assembly can be immediately exchanged, greatly reducing the room temperature idle time.

Preparing and exchanging the installation set assembly is carried out using a dedicated installation tool that provides the mechanical stability and maintains correct spacing between flanges when the assembly is not mounted into the cryostat.

Extensive Experimental Wiring Capabilities 

The XLDHesl Measurement System features a variety of access ports between the Room Temperature and the Mixing Chamber Flanges, the primary ports being the six side-loading line-of-sight (LOS) ports for experimental wiring.

  • 6 x side-loading ports (LOS) 
  • 3 x KF40 (LOS) 
  • 4 x KF40 

The side-loading system is compatible with our High-Density Wiring options. High-Density Wiring is a modular option for the XLDHesl system that enables high scalability for the experimental wiring, especially for high-frequency signals.

Read more about High-Density Wiring

Vast Experimental Space 

The Evaporator Flange diameter is 520 mm. 

Upgrade to a Dilution Refrigerator Measurement System 

The XLDHesl Measurement System is an XLDsl System without the dilution unit. It can be upgraded to a Dilution Refrigerator Measurement System at any later stage, and the upgrade can be completed with an on-site installation in 3–4 days. 

The XLD400Hesl model can also be upgraded to a full XLD400sl Dilution Refrigerator Measurement System, and the XLD1000Hesl model to an XLD1000sl System.

Temperature Controller

The Bluefors Temperature Controller enhances the user experience of our cryogenic systems. With a modern and intuitive user interface, you get direct control and overview of the temperature status of the system. The Bluefors Temperature Controller is fully integrated into the system. 

Read more about Bluefors Temperature Controller

Gas Handling System & Control Software Generation 2

Technical Specifications

2.0

XLDHesl

Measurement System

Note: The cooling power is measured on the Evaporator Flange. The cooldown time to base temperature is measured on an empty system with a standard experimental space and shield set.

XLD400HeslXLDHesl (He-3) XLDHesl (He-4) 
GuaranteedGuaranteed
Base temperature 450 mK 850 mK 
Cooling power at 1 K 30 mW 
Cooling power at 0.7 K 15 mW 
Cooldown time  < 18 h < 18 h 
Evaporator Flange diameter520 mm 520 mm 

XLD1000HeslXLDHesl (He-3) XLDHesl (He-4) 
GuaranteedGuaranteed
Base temperature 450 mK 850 mK 
Cooling power at 1 K 35 mW 
Cooling power at 0.7 K 25 mW 
Cooldown time  < 18 h< 18 h 
Evaporator Flange diameter520 mm 520 mm 



Options

3.0

XLDHesl

Measurement System

Note: XLDHesl has configurations with two or three Pulse Tube Cryocoolers. The Additional 4K Flange option requires the third Pulse Tube Cryocooler integration.

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.
LN2 Pre-Cooling Loop

LN2 Pre-Cooling Loop

The Liquid Nitrogen (LN2) Pre-Cooling Loop can be pre-installed in our systems at the factory to achieve faster cooldown.
Still Heat Pipe

Still Heat Pipe

The Still Heat Pipe is a passive component that reduces cooldown time by 10-15%, and improves turnaround time.

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.

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.
Additional 4K Flange

Additional 4K Flange

An additional 4K Flange can be used to dissipate large amounts of heat on XLDsl Systems.
Long-Life Cold Trap

Long-Life Cold Trap

The Long-Life Cold Trap enables the continuous operation of the system for up to three years.
Optical Access Ports

Optical Access Ports

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

Layout and Facility Requirements

4.0

XLDHesl

Measurement System

Layout Overview

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

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.

See also

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