Compact Cryofree® Dilution Refrigerator

ProteoxS

The compact Cryofree® ProteoxS dilution refrigerator delivers faster turnaround in a smaller size, with no compromise on performance.

Dry systems do not require the use of cryogenic liquids to provide the 4 K environment. Instead, pulse tube refrigerators are used. These enable push-button operation, can reduce the cost of ownership, and negate the need for a helium liquefier.

Our Cryofree® (cryogen free) range of products provides the user with much more experimental space and a larger sample plate, due to not needing a dewar surrounding the system containing the liquid helium for cooling. Mechanical vibrations from the pulse tube refrigerator are significantly reduced using a comprehensive range of vibration isolation techniques.

Quantum Devices

Integrate superconducting and dc wiring for faster turnaround characterisation of quantum devices.

Transport Measurements

High magnetic field and low temperatures for electrical transport measurements.

Photonics

Characterisation of quantum dots and nano-devices for photonic applications.

Key Specifications

Base Temerature:	<10 mK
Cooling Power at 100 mK:	>300 μW
Sample Space Diameter:	205 mm plate
Line of Sight Access:	2 x KF50 1 x KF40
PTR Options:	1.50 W
Temperature Control Range:	10 mK to 30 K with magnet at full field
Magnet Options:	12 T solenoid 6,1,1 T vector rotate
Cool-Down Time:	20 h without magnet

For additional product information:

Contact Our Sales Team

Features

Fast turnaround 10 mK platform with 4 access ports for experimental services
Signal chain solutions for electron transport or quantum devices, including integrated low-noise amplifiers and filters
Compatible with superconducting magnets and our bottom loading mechanism providing 8 h sample cool-down time
Central line-of sight port for optical access to field centre

Platform Solutions

Software

Remote access through a web-based, platform-independent control software in addition to local system control
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

System

Reduced ceiling height requirement to suit common research laboratories
Cross-braced stiffened frame that minimizes vibration transmission eliminating the need for active damping
Lighter vacuum cans and shields removes the need for lifting equipment

Options / Accessories

Wiring and Signal Conditioning Sample Loader Magnets

Wiring and Signal Conditioning

Flexible Wiring

24-way twisted-pair DC looms with copper, constantan or NbTi conductors
Flexible coaxial (S1) wiring for DC or low frequency
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

Coaxial Wiring

UT34 and UT85 coax with SMA connectors for 18 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

Sample Loader

Our patented bottom loader and active gas gap heat switch technology enable fast sample turnaround times with sample puck cooldown times in less than 8 hours, particularly suited to magnet systems and for qubit screening.

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 22 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
Cooling power up to 150 μW at 100 mK
Base temperature < 12 mK

Magnets

Solenoid Magnets

12 T solenoid magnet with 57 mm bore
High filament count for reduced size, high sweep rate and low flux jumping
All magnets ramp to full field in 1 hour or less
Persistence mode switch

Vector Rotate Magnets

6,1,1 T 3 axis vector rotate magnet with a 77 mm bore
Maximum field for 360° vector rotation: 1 T vector magnitude in sphere
Vector tilting angle 2.5° from vertical axis with a vector magnitude of 6 T

Resources

ProteoxS Brochure

The Proteox Family Brochure