New generation Triton dilution refrigerator

Our new generation Triton Cryofree® dilution refrigerator – high power and enhanced sensitivity in quantum technologies and ultra low temperature physics

With over 260 systems installed worldwide, TritonTM is used in world-leading research across condensed matter physics, with a particular focus on advanced computing, quantum technologies, spintronics and optics. The new generation Triton system continues to provide market leading performance and reliability, with enhanced cooling power, ease of use, user access and experimental space.

  • New generation 2016 Triton dilution refrigerator
  • NEW cooling power – latest 7th series high cooling power DU7 dilution units give enhanced sample cooling powers of 500 µW at 100 mK and 15 µW at 20 mK as standard, without increased volumes of costly 3He

  • NEW large experimental space – a new, larger 290 mm mixing chamber plate gives Ø290 x 240 mm sample space below it. More space on all the experimental stages means greater capacity for wiring, filtering, signal attenuation and other RF signal chain components to be easily accommodated, while a range of larger, heavier and more complex integrated superconducting magnets are also made possible

  • NEW design features for easiest operation and highest reliability 

  • Low vibration for the most sensitive experiments

  • Complete magnet integration – only Oxford Instruments is able to offer in-house design, manufacturing and support of both the dilution refrigerator and the superconducting magnet

  • Fast sample change and maximum sample size – unique top- and bottom-loading sample puck mechanisms for rapid, protected sample exchange while preserving base temperature performance

  • The Triton guarantee: 3 years comprehensive warranty including all supplied third party components, such as the pulse-tube cooler, pumps and electronics – all backed by our expert regional service teams, for complete peace of mind

Specifications and performance:

Ultra low temperature experiments now frequently extend well beyond the sample or device itself, to incorporate signal conditioning such as high frequency qubit read-write control lines, low radiation environments for quantum sensor detection, and ultra low vibration systems for pump-probe experiments. These all create growing demands for space, cooling power and performance, which the new generation Triton has been designed to answer.

  • Base temperature and cooling power
  • Our latest 7th series high cooling power DU7 dilution units give the new generation Triton the highest cooling powers for your experiments.


With DU7-500 dilution unit

With DU7-300 dilution unit

Base T:

8 mK typical, < 10 mK guaranteed

8 mK typical, < 10 mK guaranteed

At 100 mK:

500 μW typical, 450 μW guaranteed

300 μW typical, 250 μW guaranteed

At 20 mK:

15 μW typical, 12 μW guaranteed

10 μW typical, 8 μW guaranteed

3He requirement: 

18 litres STP

11 litres STP

  • System cool down time to base temperature: < 24 h
  • Maximum temperature: 30 K
  • Large sample space
  • 290 mm mixing chamber plate giving Ø290 x 240 mm sample space below it with standard tails
  • Extended tails also available for longer space
  • Robust and proven dilution unit technology
  • The solid track record of the Oxford Instruments dilution unit is a result of several decades of work into perfecting the art of welding, brazing and soldering components for maximum reliability and leak-tightness. This critical component is now used in more than 1000 wet and dry dilution refrigerators worldwide – a larger installed base than all other vendors combined.
  • Low vibration
  • The PTR coldhead isolated at both system top plate and at intermediate and 4 K stages
  • The new support design maintains rigidity and low vibration between the cooling stage plates, and gives easier access and new larger space between the cooling stage plates for wiring, filtering, attenuators and other signal chain components
  • Easy set-up and operation
  • Single-user fitting of radiation shields and vacuum can (OVC) for assembly made easy
  • Superconducting magnet current leads are easily demountable with bolted connections, making it easy to remove the magnet
  • Top and bottom sample loading options
  • Unique sample puck designs for best-in-class wiring capability and sample change
  • Optics
  • Demonstrated capability for multiple optical window configurations
  • Customised optical magnet solutions such as 2/2/2 T optical 3-axis vector rotate magnet
Special optical access sample pucks
Our latest 7th series high cooling power DU7 dilution units give the new generation Triton the highest cooling powers for your experiments.
  • System cool down time to base temperature: < 24 h
  • Sample space: A new, larger 290 mm mixing chamber plate gives Ø290 x 240 mm sample space below it
  • Maximum temperature: 30 K
  • Top and bottom sample loading options

Open the tabs below for more details.

The new generation Triton: sample puck loading

Sample puck loading

Our best-in-class, patented, bottom-loading sample exchange mechanism comes with a choice of 42 mm or 72 mm sample space.

Triton dilution refrigerator sample puckTriton dilution refrigerator sample puck in place

  • Proven 10 mK sample temperatures with multiple semi-rigid coaxes
  • Supports a wide range of sample wiring configurations: 14 RF connections (40 GHz SMP) plus 50 DC connections supplied as standard, and up to 28 RF plus 100 DC available on request
  • Wiring for piezo nanopositioning stages
  • Specialised low eddy-current designs
  • Fast cool-down within 10 hours of sample change
  • Sample protected from ESD (make-before-break) via sample grounding or biasing before puck docks with mixing chamber plate

Top-loading sample exchange is also available, allowing integration with optical table and other site-specific requirements such as an experimental pit.


The new generation Triton: integrated cryogen free superconducting magnets 

Integrated cryogen free superconducting magnets 

Integrated cryogen free superconducting magnets for the new 2016 TritonOxford Instruments is the only company able to offer in-house design, manufacturing and support of both the dilution refrigerator and the superconducting magnet, giving you access to unique service and support capabilities of all aspects of the system. 

  • A wide range of standard Cryofree solenoid magnets from 0.3 T to 14 T (up to 18 T on the TritonXL platform), with magnet bore sizes ranging from 57 to 200 mm to suit bottom- or top-loading sample pucks or a wide range of other sample arrangements 
  • Multi-axis vector magnets, including our leading 6/1/1 T, 90 mm bore design 
  • Both split pairs and multi-axis vector magnets with optical access 
  • Active shielding options to reduce magnetic footprint, and cancellation coils to minimise eddy current heating in swept-field experiments 
  • Custom magnet solutions for high homogeneity, high persistence, or other application-specific requirements; please call us to discuss and learn about our extensive portfolio of custom magnet designs 
  • Current leads demountable with fasteners make it easy to remove the magnet 
  • Magnet Field Control software makes field setting easy, even with vector magnets in two or three dimensions (which are selectable in Cartesian, cylindrical, or spherical coordinates)

Mercury superconducting magnet power supplies 

Mercury superconducting magnet power supplies

The MercuryiPS is our industry-leading superconducting magnet power supply, offering a reliable, high precision and high stability solution for all superconducting magnets. These multi-configurable, expandable power supplies feature a 60 A master unit with touch screen control interface, combined with one or more 60 A slave units to provide higher currents and multiple outputs for 2 and 3 axis vector magnets. The MercuryiPS includes built-in functionality for persistent mode control, magnet temperature interlocks, quench protection and remote control via TCP/IP, USB, GPIB (with optional card) and serial ports.


Optical windows for Triton

Optical windows

A wide range of standard and customised window configurations for detector applications has been developed for Triton.

A selection of cold and warm window materials with appropriate stress relief mounts to cope with thermal contraction are available, including Spectrosil B, Spectrosil WF, Sapphire, Quartz, Polypropylene and Mylar.





Wiring capabilities for Triton

One of the advantages of dry dilution refriegrators over wet dilution refrigerators is that there is more space available for customer wiring. The Triton offers 3 line of sight ports for high frequency coaxial lines or other custom services and 3 non-line of sight ports giving access for a variety of flexible wiring options.


Non-line of sight services

  • 24 way DC looms – Constantan or Cu/NbTi twisted pairs
  • S1 flexible coaxial lines – for use up to 500 MHz
  • Thermal clamping at PT1, PT2, Still, 100 mK and mixing chamber
  • Current leads for superconducting magnets
  • Wiring to suit commercially available nano-positioning devices
  • Custom services and optical fibres available

Line of sight services

The three line of sight ports available for high frequency coaxial lines or other custom services can be configured as two off KF40 and one off KF50 vacuum fittings, fully termintated for high frequency applications or blanked for customer fittings. In addition, a 65 mm central access LOS port is available for top loading sample access.

  • UT85 semi-rigid coaxial lines
  • Stainless steel inner / stainless steel outer conductor with PTFE insulation (UT85-SS-SS)
  • Beryllium Copper inner / stainless steel outer conductor with PTFE insulation (UT85-B-SS)
  • Niobium inner / Niobium outer conductor with PTFE insulation (UT85 Nb Nb) from Still to mixing chamber
  • Heatsinking at PT1, PT2, Still, 100 mK and mixing chamber
  • SMA termination for frequencies up to 18 GHz
  • SK termination for frequencies up to 40 GHz
  • 20, 10, 6 dB attenuators at PT1, PT2 and Still plates available
  • Optional noise thermometry
  • Custom services and optical fibres available

Weak phonon-electron interactions at low temperatures make electron system cooling problematic in many applications. Fast pulse sequences for signal control is necessary in many areas of modern physics with corresponding high bandwidth wiring required. When working in the GHz frequency range, it is important to filter background blackbody radiation in the lines before it reaches the sample. Working with many of our customers, we have developed extensive high frequency wiring options with signal attenuation and heatsinking, to minimise electron temperatures on the sample or device.

  • Semi-rigid coaxial cables with frequency ranges up to 40 GHz
  • Heatsinking of outer conductor at all thermal plates
  • Heatsinking of inner conductor and filtering of blackbody radiation using attenuators

The new generation Triton: software and control

Software and control

2016 Triton dilution refrigerator software and control

Triton cryogen free dilution refrigerators are software controlled via a high quality PC running Windows10, providing system automation of refrigerator routines and programmable temperature/field sequences.

System automation

  • Fully automatic cool-down/warm-up routines
  • Fully automatic pre-cooling/mixture collection
  • Sample change wizard for systems with bottom- or top-loading sample exchange load-locks
  • Fully integrated magnet control via our magnet field control software, making field setting easy, even with vector magnets in two or three dimensions (which are selectable in Cartesian, cylindrical, or spherical coordinates)

Experimental control:

  • Programmable temperature and field sequences
  • Programming library supplied with example LabVIEW VIs
  • Integration of dilution refrigerator / magnet control and experimental data acquisition
In-built safety features: 
  • Continuous monitoring of all pressure gauges
  • System automatically enters 'safe state', if necessary
  • Automatic software intervention in case of over pressure with fail-safe in-line pressure relief valves, protecting the mixture and dilution refrigerator in the event of extended power failures
  • UPS option – automatic alert emails can be sent to user in the event of a power failure
  • Monitoring of magnet temperature during field sweep, high temperature control, sample loading
  • Automatic magnet de-energisation in the event of power cut, pulse tube cooler failure, or excessive heat load on second stage cooling
Triton command interfaces
  • Detailed remote interface programming manual
  • Platform independent remote scripting interface
  • Standard internet (TCP/IP) protocol
  • Compatible with any programming language that can access the TCP port e.g., LabVIEW / Matlab / Python / C / C++ / C# / Visual Basic / HP VEE, etc.
  • Monitoring and control of automatic software routines and system parameters
  • Definable access levels (read only/read-write, etc.) with security

User support:

  • Remote system access by Oxford Instruments support staff can be enabled to aid system diagnostics
  • All system settings are backed up prior to shipping from the factory

Configuration and optional system upgrades for Triton

Heat pipes for accelerated cooling of magnets

At least 30% reduction in cool down time (with a 12 T or larger magnet) can be achieved using heat pipes. This patented solution use heat pipes to connect the magnet directly with the first stage of the pulse-tube during the cool down phase. The operation is self-regulating and automatic, without any need of additional electronics, software or user intervention. Actual reduction in cool down time depends on the type of magnet, please enquire for details.


Our UPS option is integrated with the Triton control software that ensures system logging and safety features are maintained and email notifications are sent. Shorter power blips result in a full system recovery. Extended power cuts result in the system being put in a 'safe mode', which simplifies recovery when power is restored. All systems with and without UPS are protected against pressure build-ups using mechanical pressure relief valves to allow the He3/He4 mixture back into the tank, without any software or manual intervention.


Warm up heaters

10 mK to 300 K can be reached in 4 hours. Nominal warm up time with Nitrogen exchange gas in the vacuum chamber is 12-15 hours longer if a magnet is installed. These high power heaters are mounted on four experimental plates together with the necessary protection circuit (thermal switches) and controlled with a Mercury ITC temperature controller. Apart from significantly shortening the warm up time, it also automates the procedure and avoids the use of Nitrogen exchange gas which may condense on the sample.



Triton technical support and service

Local technical support

Based at UK, USA, Germany, China, Japan and India, Oxford Instruments has a dedicated, qualified and experienced service team to support you with everything from installations, preventative maintenance, break fix, to general queries. You also have direct access to technical support from our magnet and cryogenics system engineers in our Oxford factory.

Service when you need it

Your Triton already comes with a full 3-year warranty (Triton Guarantee) covering the full system. For
even greater peace of mind for your planning and convenience, we offer the following service options –

Comprehensive service contract:

On-site preventive maintenance by an OI service engineer, priority access to spare parts from a service stock reserved for comprehensive service contract customers, as well as extended system warranty (if the Triton Guarantee has expired).

Preventative maintenance contract:

On-site preventive maintenance by an OI service engineer. We will service all pumps and compressors, update software/firmware and do a general health check of the system.

Preventative maintenance service kits:

Individual factory-serviced exchange pumps and compressor adsorbers are available to purchase as and when required. These service kits are installed by the customer in accordance with OI provided work instructions.

Extended warranty:

Covers your system beyond the standard 3 years Triton guarantee.

The Triton service brochure can be downloaded here.

The new generation Triton: downloads and further information


Integration of superconducting magnets with cryogen free dilution refrigerator systems

(doi: 10.1016/j.cryogenics.2009.09.008)

Download the article here


A micro Kelvin Cryofree platform with noise thermometry

(doi: 10.1088/1367-2630/15/11/113034)

Download the article here


A rapid sample-exchange mechanism for cryogen free dilution refrigerators compatible with multiple high frequency signal connections

(doi: 10.1016/j.cryogenics.2014.01.007)

Download the article here


A new ultra low temperature cryogen free experimental platform

(doi: 10.1088/1742-6596/568/3/032014)

Download the article here

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Cryofree custom Triton dilution refrigerators

Cryofree custom Triton dilution refrigerators

The modular design of the Triton offers extensive configuration possibilities and flexible sample environments. Some of the options include integrated and remote motor PTRs; large sample space; integrated superconducting magnets up to 18 T; top and bottom sample loading into vacuum; extensive wiring and service options as well as vacuum tail sets, to suit any applications.

Product Support

Help Desk support

Help Desk support

A team is available to answer phone or email requests.

Installation and Service

Installation and Service

We can take care of the installation and maintenance of your product for complete piece of mind.

System Maintenance, Repair and Upgrades

System Maintenance, Repair and Upgrades

A full repair and maintenance facility is available; our dedicated technicians repair and service hundreds of systems per year.

Dedicated Spares and Accessories

Dedicated Spares and Accessories

Oxford Instruments Direct - Cryospares offers an extensive range of cryogenic spares, magnet spares, accessories and consumables - with a fast and efficient service, expert support and rapid delivery of products world-wide.

ServiceWise Contracts

ServiceWise Contracts

Service and maintenance contracts.

Extended Warranty

Extended Warranty

Extended warranty and PM including parts and labour. This contract allows you to safeguard your investment with complete peace of mind.

Software Downloads

Software Downloads

Oxford Instruments have released a major upgrade to the cryogen-free Triton dilution refrigerator system control software.

Mercury Support

Mercury Support

Support website for customers using MercuryiTC temperature controller and MercuryiPS magnet power supply.

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