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Triton

Triton™ dilution refrigerator is our most versatile Cryofree® research tool for applications in quantum technology and condensed matter physics at temperatures < 10 mK. It is configurable with a wide range of superconducting magnets up to 16 Tesla, unique top and bottom sample-loading mechanism, signal wiring and optical windows to make it suitable for any ultra-low temperature measurement.

  • Robust and proven dilution unit technology used in more than 1000 installed wet and dry dilution refrigerators

  • Integrated with our in-house manufactured superconducting magnets

  • 3 years standard warranty which covers all supplied components

  • Supported by our regional customer service teams based in the UK, Germany, USA, China, Japan and India


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Triton offers a powerful, low-vibration platform with a range of configurable options to suit your experimental requirements:

  • Wide range of integrated solenoid and vector magnets up to 16 Tesla
  • Market leading top and bottom sample-loading mechanism
  • Integrated pulse-tube cooler, decoupled with flexible braids and a bellow to minimise vibrations 
  • Space for multiple semi-rigid RF lines with optimised attenuator configurations for the lowest possible electron temperature
  • Options for optical access through fibres or windows
  • Advanced software control with a remote command interface and safety interlocks
  • 3 years warranty comes as standard, which covers all third-party supplied components, such as pulse-tube cooler, pumps and electronics

Our latest Triton continues to provide enhanced performance and reliability.

  • Enhanced cooling power: up to 12 µW at 20 mK
  • More sample space: 290 mm diameter
  • Improved support structure for easier sample access and better vibration performance
  • Improved usabilit: single-person assembly of all shields and demountable magnet current leads (without soldering)

Triton has been designed to maximise up-time and reduce the risk of blockage:

  • Dry and clean pumping system with a roots pump and diaphragm compressor backing the turbo pump
  • This set-up eliminates the need to use scroll pumps, which are prone to generate dust
  • All-welded gas handling system with high quality pneumatic valves
  • Easily accessible and demountable main impedance which simplifies service in case of contamination

Standard system configuration includes:

  • Mixing chamber sensor, factory calibrated against primary thermometry
  • Pumps located in a remote pump rack to minimise vibrations and RF noise
  • Rigid cryostat floor stand which minimises vibrations from the lab
  • Electrical isolation between cryostat and all connecting gas lines, pumps and the floor stand

Triton 500

  • 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
  • System cool-down time: < 24 hours
  • Sample space: 290 mm diameter x 240 mm height
  • 3 x 50 mm plus 1 x 65 mm line-of sight ports for multiple semi-rigid coaxes
  • 1 - 2 W pulse-tube cooler
  • 18 L of He-3 gas

 

Triton 300

  • Base temperature: < 10 mK
  • Cooling power at 20 mK: > 6 μW
  • Cooling power at 100 mK: > 350 μW
  • Temperature control range: 10 mK to 30 K with magnet at full field
  • System cool-down time: 24 hours
  • Sample space: 290 mm diameter x 240 mm height
  • 3 x 50 mm plus 1 x 65 mm line-of sight ports for multiple semi-rigid coaxes
  • 1 - 2 W pulse-tube cooler
  • 11 L of He-3 gas

 

  • Anomalous Fraunhofer patterns in gated Josephson junctions based on the bulk-insulating topological insulator BiSbTeSe2

(arXiv: 1803.09976) 

View the article here 

  • A new ultra-low temperature cryogen free experimental platform

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

View 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)

View the article here

  • A micro Kelvin Cryofree® platform with noise thermometry

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

View the article here

  • Integration of superconducting magnets with cryogen free dilution refrigerator systems

(doi: 10.1016/j.cryogenics.2009.09.008)

View the article here

"I am extremely happy both with the products and the after-sales service of Oxford cryogenic systems. I am especially happy with my 16 Tesla Triton system – very low noise levels – perfect for sensitive electrical measurements."  ~ Professor Aveek Bid, IISc, India 

Our patented market leading sample loading mechanism allows for fast and easy sample exchange without the need to warm the entire system to room temperature:

  • Choose between top and bottom loading options to suit your lab space and experimental set-up
  • Loading a sample puck takes < 15 minutes and the system automatically cools back to base temperature 
  • Proven track record with > 80 top and bottom loading systems installed
  • Our unique demountable puck concept results in the lowest possible sample temperature with up to 28 RF and 100 DC connections on a single sample puck
  • Ideal solution for multi-user facilities as different experiments can be prepared in different 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 experimental wiring
  • Available with options for optical access and integrated piezo nano-positioning stages

 

Sample holders for ultra low temperature research

We are the only company able to offer in-house design, manufacturing and support of both the dilution refrigerator and the superconducting magnet, delivering a fully integrated sytem. 

  • Solenoid magnets up to 16 T
  • Two and three-axis vector magnets with a vertical field up to 8 T and a horizontal field up to 3 T
  • Split-pair magnets to allow line-of sight horizontal optical access to the sample region
  • Active shielding options to reduce magnetic footprint, and cancellation coils to minimise eddy current heating in swept-field experiments
  • Customised magnet options for improved homogeneity, persistence stability or field resolution
  • Our use of advanced superconducting wire technology guarantees the lowest possible level of flux jumping
  • Magnet current leads have demountable contacts at 4 K, which eliminate the need for soldering when removing the magnet
  • Integrated Magnet Field Control software makes 3D field setting easy in Cartesian, cylindrical or spherical coordinates
Magnet Integration with Triton

Triton has four line-of-sight ports which allow for multiple semi-rigid coaxial lines to be installed, one of these ports can also be used for top-loading sample exchange. An additional four non-line-of-sight ports are available for a variety of flexible wiring options.

Semi-rigid coaxes

  • UT85 coaxes with SMA or SK connectors for 18 GHz or 40 GHz bandwidth respectively
  • Standard coax materials: Stainless-steel, BeCu, NbTi
  • Heat sinking using bulk-head connectors fitted at all experimental plates with optional attenuators installed at PT1, PT2 and the still
  • All coax assemblies are cryogenically cycled and VNA tested in the factory

 Flexible wiring options

  • 24-way twin-twisted DC looms with Constantan, Cu or NbTi conductors
  • Flexible coaxial (S1) lines – 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
Cryofree dilution refrigertor wiring 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, Crystalline quartz, Polypropylene and Mylar
  • Line-of sight vertical optical access through the top or bottom of the cryostat
  • Horizontal optical access, either line-of-sight through a split-pair magnet or via a cold mirror
  • Minimal impact on base temperature: 20 mK sample temperature on bottom loading pucks demonstrated
Optical Windows for Triton Cryofree dilution refrigerator

Triton cryogen free dilution refrigerators are software controlled via a high quality PC running Windows 10, 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 vetor magnets in two or three dimensions 

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 and 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

  • 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) 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

Local technical support

  • Based in the UK, USA, Germany, China, Japan, and India, We have a dedicated, qualified and experienced service team to support you with everything from installations, preventative maintenance, spares, upgrades and general queries. You also have direct access to our technical support team backed by magnet and cryogenics system engineers at our Oxford factory.

A step up from warranty... 

Your Triton comes with a standard 3-year warranty to cover for the unexpected however for greater peace of mind we advise you invest in an OiService Support Plan:

  • Bronze Support Plan: Dedicated support and reduced service costs
  • Silver Support Plan: Maximise uptime, service parts and labour included
  • Gold Support Plan: Ultimate support and complete peace of mind
  • Platinum Support Plan: Fully customised support tailored to your unique needs 
  • Extended warranty: Once the standard warranty expires

The Triton service brochure can be viewed by clicking on the button below

Triton Service Brochure

Upgrades/Accessories

A range of system upgrades and experimental options are available on request:

  • Cryogenic low-pass filters for DC looms
  • Additional features to minimise vibrations from the lab
  • System warm-up heaters
  • Liquid nitrogen by-pass valve to simplify cold trap swap-out
  • Uninterruptable power supply to minimise the impact from power cuts
  • Linear pulse-tube motor drive to reduce RF noise

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