CRYOCryofree® Magnet and Helium Recondensing Systems

Which technology is right for you?

Cryofree magnet and helium recondensing systems

System Selection

Stand-alone room temperature bore magnets

Integrated cryogen-free magnet and low/ultra-low-temperature inserts

Helium recondensing systems

With Oxford Instruments’ experience in superconducting magnets from wire development to full system expertise, the technology has developed so that any application for superconducting magnets can be considered Cryofree.

Cryofree magnets require no helium refill so optimise your experimental time while reducing issues of skilled infrastructure and support. As an alternative to Cryofree technology we can also offer helium recondensing systems which considerably reduce helium consumption while enabling the most challenging magnet designs.

• No need for liquid helium

• Can be used with magnet bore in any orientation

• Can be integrated with wet and dry low temperature cryostats

• No need for liquid helium

• Compact system

• Low vibration

• Large sample space

• Optical access available

• Base Temperature as low as 10 mK

• Quick sample change options

• Reduced helium consumption

• Compatible with all the standard range of Oxford Instruments’ dilution refrigerators and 3He refrigerators

• Compatible with the most complex magnet designs (up to 22 T)

CRYOFREE

Cryofree magnet and helium recondensing systems

Typical Cryofree Magnets:

• Solenoid magnets up to 18 T

• Split pair magnets up to 14 T

• Vector rotate magnets

Magnet cool down acceleration technology, heat pipe technology (Patent pending application number 1108605.5):

12 Tesla magnet systems normally cool to base temperature

in less than 32 hours. With the new heat pipe technology,

15 T magnet cool down time is reduced by half!

How does it work?

The heat pipe connects the magnet directly to the pulse

tube refrigerators’ first stage during the cool down phase to

accelerate cooling to below 80 K. The heat pipe automatically

switches off below the nitrogen melting point at 65 K.

• Faster experiment: as magnet cool down time is

reduced by at least 40%

• Self-regulating heat pipe – no need for any control

electronics or software

• The only cryogen-free solution available on the market

New MercuryiTC temperature controller, MercuryiPS magnet power supply and Oxsoft IDK software

Accurate

• Measures and controls temperatures down to 250 mK

Stable

• Magnet power supply stability less than ±2.8 mA at 120 A

Expandable

• Controls 4 stages simultaneously and a stepper motor

• Monitors up to 9 temperature sensors at the same time

• Multi-axis magnet control

User-friendly interface and system control

• Configurable touch screen interface

• Remote access

• Complete system control with Oxford Instrument

Development Kit software

Cryofree magnet and helium recondensing systems

“I am delighted with the convenience of my Cryofree magnet system. Preparation of the magnet for an experiment only involves the usual pumping, and switching on of the cryocooler a couple of days before we start. The magnet works well, and is a key component in our unique experiment for confocal magneto-optical studies of quantum dots with arbitrary orientation with respect to the magnetic field.”

Prof. Richard Phillips, Cambridge University

CRYOFREE

For more information, please visit our website:

www.oxinst.com/mercury

CRYOStand-alone /Custom Cryofree Magnets

Cryofree magnet systems

Stand-alone Cryofree magnets

• Room temperature bore stand-alone magnets are available

up to 18 T using GM cryocoolers to enable either vertical

or horizontal bore orientation

• Can be used with a suite of helium or cryogen-free low

temperature inserts such as 3He refrigerators, dilution

refrigerators or 4 K cryostats

For more information, please visit our website:

www.oxinst.com/cryofreemagnets

Cryofree®

Custom Cryofree magnets

If our standard range of superconducting magnets doesn’t

suit your requirements, we can design and manufacture a

bespoke system.

Examples of custom Cryofree magnets delivered include:

• Actively shielded Cryofree split pair magnet for

neutron scattering

• 6 T – 1 T – 1 T vector magnet with cancelled field region

• 8 T – 3 T – 1 T vector magnet

• High homogeneity magnets

10 T, 110 mm room temperature bore Cryofree magnet and helium bath cryostat with 85 mm sample space. System used for confocal microscopy for the study of semiconductor quantum dots.Photo courtesy of Prof. Richard Phillips, Cavendish Laboratory.

5 T actively shielded Cryofree magnet for neutron scattering.

Lowest guaranteed base temperature

• ≤ 1.5 K with Variable Temperature Insert

• Can be extended down to ≤ 300 mK with the

Heliox™VT 3He refrigerator and ≤ 25 mK with the

Kelvinox®VT dilution refrigerator

• Highest upper temperature: up to 420 K

• 30 mm and 50 mm diameter inserts available

• No gas flow over sensitive samples: the system uses

a static exchange gas around the sample, preventing

flow induced movement of delicate samples or

measurement probes

• Lowest vibration: suitable for a wide range of

sensitive measurements

• Vector rotate and split pair magnet options

• Optical access available with the

SpectromagPT

b-tStand-alone /Custom Cryofree Magnets

Integrated Cryofree Variable Temperature Insert and Magnet Systems

1.5 K – 300 K, up to 18 Tesla

The Teslatron™PT and Spectromag™PT are cryogen-free superconducting magnet systems, providing top-loading access to a sample in a variable magnetic field/low temperature environment.

Magnetic fields

• Up to 18 Tesla with the TeslatronPT. Uses the

latest low loss Nb3Sn superconducting wire available

on the market supplied by Oxford Superconducting

Technology, a division of Oxford Instruments

• Fast ramping capability: it takes less than

30 minutes to go from 0 to 15 T

• Up to 10 Tesla with the SpectromagPT

(with optical access)

For more information,

please visit our website:

www.oxinst.com/teslatronPT

www.oxinst.com/spectromagPT

• Risk-free, fast and easy sample change with our separate sealed cooling loop

• Lowest power consumption

• Fast magnet ramp rates

Cryofree®

For more information,

please visit our website:

www.oxinst.com/triton

b-tIntegrated Cryofree Variable Temperature Insert and Magnet Systems

10 mK – 30 K, up to 18 Tesla

Magnets can be integrated with our award winning Triton™ Cryofree dilution refrigerator. We have now shipped over 100 Triton systems, nearly half were fitted with integrated magnets.

Integrated magnet warming and cooling during 5 T field sweep, hold at field and sweep back to 0 T (sweep rate 0.31 T/min). Local eddy current heating at the mixing chamber also shown during field sweep with time to recover back to base temperature ~1 hour. 3 µW cooling power available at 20 mK.

Top and bottom

loading loadlock for fast

sample exchange

• Patented design

• 15 min sample exchange

• Cool down time < 8 hrs

• Top-loading demountable sample carrier

cooled to 10 mK

• All wiring efficiently heat sink on the dilution refrigerator

• 5, 8, 12 and 15 T solenoids available

as standard

• NEW Triton Ultra offers magnets

up to 18 T

• Standard vector rotate magnets

options

• HTS current leads for low heat

dissipation between 50 K and 4 K

• 57 or 77 mm cold bore standard

• Fast ramping capability using the

latest high field, low loss Nb3Sn

developed by Oxford Instruments

• 1 in 103 over 10 mm dsv homogeneity

• High homogeneity options

• 1 in 104 /hr stability with persistent

mode switch fitted

• Custom designs, split pairs and

vector rotate coils available

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tritonIntegrated Cryofree Dilution Refrigerator and Magnet Systems

Helium recondensing magnet systems

heliUMHelium Recondensing Magnets

Minimise running costs and maximise experimental time

The IntegraAC range of recondensing helium systems has been developed to significantly reduce the consumption of liquid helium by recondensing helium gas evaporated within the system, which would otherwise be vented from the cryostat.

• Significantly reduces helium consumption and

frequency of refills

• Compatible with all the standard range of dilution

refrigerators, 3He inserts, VTI and superconducting

magnets. This means you won’t have to disrupt your

experiments when you are upgrading your existing dewar

• The cryostat can be kept cold continuously which

minimises the costs associated with cooling a sample and

gives greater freedom to schedule experimental time

• Can be used for highly vibration sensitive experiments

Custom designs

Unrivalled experience in high field helium recondensing magnet

systems enabling the most advanced magnet designs required

by challenging applications.

Increasing range of options:

• High field wide angle split pair magnets

• Solenoid magnets up to 22 T

• Fast ramping magnets

• Recondensing of the Variable Temperature Insert and

the lambda refrigerator

For more information, please visit our website:

www.oxinst.com/integraac

Dr. Oleg Kirichek, Sample Environment Group Leader at ISIS, Rutherford Appleton Laboratory with two recondensing neutron scattering magnets including a 9 T wide angle and 14 T at 4.2 K. These magnets are used on the LET, MERLIN and WISH target stations at ISIS.

Photo courtesy of Diamond Light Source. 14 T UHV recondensing magnet system recently installed on the I10 Beamline for Advanced Dichroism Experiments (BLADE) at Diamond Light Source, the UK’s national synchrotron facility.

tritonIntegrated Cryofree Dilution Refrigerator and Magnet Systems

Oxford Instruments

NanoScience

For more information please email:

nanoscience@oxinst.com

UK

Abingdon, Oxfordshire

Tel: +44 1865 393 200

China

Shanghai

Tel: +86 21 6490 8280

Germany

Wiesbaden

Tel: +49 6122 937 171

Italy

Pieve Emanuele, Milan

Tel: +39 335 7378794

Japan

Tokyo

Tel: +81 3 5245 3261

USA

Concord, MA

Tel: +1 978 369 9933

www.oxford-instruments.com

This publication is the copyright of Oxford Instruments plc and provides outline information only, which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or regarded as the representation relating to the products or services concerned. Oxford Instruments’ policy is one of continued improvement. The company reserves the right to alter, without notice the specification, design or conditions of supply of any product or service. Oxford Instruments acknowledges all trademarks and registrations. © Oxford Instruments plc, 2012. All rights reserved. Part no: OINS/CMRS/2012/08

iService® – ServiceWise

By choosing Oxford Instruments as the supplier of your next Cryofree or helium

recondensing system, not only are you getting a reliable product but also access

to a service support team.

This includes:

• A team of 14 service engineers based worldwide, dedicated to the

NanoScience division

• Five people dedicated to help desk

• Bespoke Cryospares service, visit our eShop at: www.cryospares.com

All of our products are supported by a 12 month warranty including parts, labour,

on-site visits and third party items like pumps or electronics. Extended warranty are

available on request.

ServiceWise service contracts:

Cryofree magnets and recondensing dewars use pulse tube

or GM coolers which require regular maintenance to

ensure optimum performance. Oxford Instruments

has support packages for complete peace of mind.

CRYO

www.oxford.instruments.com/nanoscience for more information