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The modular Cryofree® Proteox family of dilution refrigerators delivers greater experimental capacity and adaptability.

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Key Benefits

Fully customisable Secondary Insert enables rapid exchange of full experimental setups for a multi-user, multi-experiment system, saving time and money.

Greater Experimental Capability And Value With A Secondary Insert

Easy to use web-based, platform-independent software offers full control and powerful logfile visualisation from anywhere

Intuitive Software For Ease Of Use And Experience

Solutions can be built to meet varied application requirements, and easily scaled and adapted when needs change or budgets grow.

Scalability And Flexibility With Modular Upgrade

Features

High Input/Output Capability

Qubit scale-up and high input/output applications are enabled by abundant line-of-sight access. Up to 2 × ISO100 ports on the Secondary Insert, 2 × KF40 and 2 × KF25 on the primary insert.

Stability and Reliability

Enhanced gas handling system for increased stability and reduced service requirements for long run time experiments.

Integrate Sample Exchange

Include the Oxford Instruments patented bottom loader system directly onto the Secondary Insert for rapid sample exchange coupled with magnet integration.

 

Greater Control

Active control of thermal conductivity between experimental plates is provided by a patented gas gap heat switch system, providing an expanded temperature range for phase change investigations.  

Extensive Experimental Volume

Large experimental volume provided by combining a large 360 mm diameter mixing chamber plate and increased spacing for integration of cold electronics or other experimental hardware. 

Secondary Insert

The Proteox dilution refrigerator Secondary Insert is a customisable, self-supporting module for installation and exchange of full experimental set-ups.

Overview

Moving beyond standard access ports, the Secondary Insert can accommodate full experimental set-ups, including DC wiring, coaxial wiring and signal conditioning components.

  • Flexible, modular format enhances adaptability to varied application requirements
  • Large 117 mm × 253 mm rectangular LOS access port. This can be configured as a single customisable plate, or with 2 × ISO100 ports and a range of standard options 
  • The Secondary Insert can be ordered with our patented bottom loading system as an option. This enables rapid sample exchange and can be coupled with magnet integration.

ISO 100 Port Configurations

A standard configuration of 2 x ISO 100 ports, with multiple ISO 100 options to provide experimental wiring.

  • Up to 37 UT85 coax per ISO 100 port
  • Blanking plate option with tapped M3 grid array for mounting of experimental hardware.

Sample Loader Configuration

  • Sample loader SI for rapid sample exchange
  • System is upgradable to sample loader in the future through SI configuration

Optional Blank Plates Instead Of SI

  • Blanking plate with tapped M3 grid array option if SI not required.

ISO 100 Port Configurations

A standard configuration of 2 x ISO 100 ports, with multiple ISO 100 options to provide experimental wiring.

  • Up to 37 UT85 coax per ISO 100 port
  • Include DC and coax combinations on a single ISO 100 port
  • Blanking plate option with tapped M3 grid array for mounting of experimental hardware.

Custom Configuration

  • Components can be directly mounted onto the Secondary Insert plate, creating a platform tailored to your experiment
  • Custom configurations enable up to 128 UT85 coax lines per Secondary Insert
  • Customisable insert for experimental wiring optimisation
  • Componentss mounted directly onto the SI to maximise space.

Cryogenic Low Nooise Amplifiers And RF Components

A selection of low noise amplifiers, isolators and circulators can be integrated into the wiring configuration.

  • Custom bracketry for mounting hardware - amplifiers, isolators etc.
  • Signal conditioning mounted in-line to maximise the number of components.

Software

  • Remote platform software control access via the web, in addition to local system control
  • Improved automation routines for one button operation
  • Full manual control and programmable API interface for custom routines
  • Powerful data interrogation and visualisation package with live plotting
  • Smart session management for multi-user access
  • Secure database for logging of system data.

System

  • Fully redeveloped gas handling system to ensure the minimum number of connections for long term mixture retention
  • Cross-braced, stiffened frame for maximum vibration reduction eliminates the need for active damping
  • Modular, upgradable platform with cross-compatible magnet systems
  • Automated pump bypass for increased reliability and longer service intervals.

500 μW dilution unit:

  • Base temperature: < 10 mK
  • Cooling power at 20 mK: 12 μW
  • Cooling power at 100 mK: > 450 μW
  • Temperature control range: 10 mK to 30 K with magnet at full field
  • Sample space: 360 mm diameter mixing chamber plate
  • 18 L of He-3 gas

300 μW dilution unit:

  • Base temperature: < 10 mK
  • Cooling power at 20 mK: 10 µW
  • Cooling power at 100 mK: 400 µW
  • Temperature control range: 10 mK to 30 K with magnet at full field
  • Sample space: 360 mm diameter mixing chamber plate
  • 13 L of He-3 gas

Flexible Wiring

  • 24-way twisted-pair DC looms with copper, constantan or NbTi conductors
  • Flexible coaxial (S1) wiring for use up to 500 MHz
  • Single-mode and multi-mode optical fibres
  • Thermo-coaxes for effective filtering of high-frequency noise
  • Low-impedance looms suitable for nano-positioning piezo devices.

Line-of-sight wiring

  • UT34 and UT85 coax with SMA or SK connectors for 18 GHz or 40 GHz bandwidth operation
  • Range of coax conductors including stainless-steel, CuNi and NbTi
  • Heat sinking using bulkhead connectors at all experimental plates with optional 0 dB attenuators for efficient conductor thermalisation.

Attenuators

Attenuators can be selected per line and per plate; 0 dB attenuators for conductor thermalisation; 3 dB, 6 dB, 10 dB and 20 dB attenuators.

Low Pass Filters

Low-pass multi-stage filters can be mounted for use at temperatures to below 100 mK.

  • 4 cut-off frequencies available between 170 Hz and 110 kHz.
  • Gold plated copper chassis with RF gaskets to provide screening and thermal dumping for the filter PCB.

Integrate our patented sample loader directly onto the Secondary Insert whilst retaining a full ISO 100 line of sight port for additional experimental services.

  • Easy sample exchange without the need to warm the entire system to room temperature
  • Loading a sample puck takes < 15 minutes and the system automatically cools back to base temperature
  • Up to 28 RF and 96 DC connections on a single sample puck
  • Ideal solution for multi-user facilities since different experiments can be prepared in multiple sample pucks
  • Patented loading concept allows for safe and easy operation
  • ESD protection (make-before-break) via sample grounding or biasing before the puck docks with the system.

Solenoid Magnets

  • Range of field strengths from 1 T to 14 T
  • High filament count for reduced size, high sweep rate and low flux jumping
  • Large bore sizes from 77 mm to 152 mm diameter across the solenoid magnet range
  • Maximum sweep rate of 2 Amp/minute
  • Quench protected.

Vector Rate Magnets

  • 3 axis vector magnets with a vertical field up to 9 T and a horizontal field up to 3 T
  • 90 mm large bore across all high field vector rotate options.

Customised Magnets

  • Customised options for improved homogeneity, persistence stability or field resolution
  • Specialised capability for advanced magnet design including split pair and actively shielded magnet systems.
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