Part of the Oxford Instruments Group


A dilution refrigerator insert system providing top-loading of the sample directly into mixture, integrated into a low-loss helium cryostat

  • More than 400 µW cooling power

  • High stability of the thermal environment

  • Full automation of the insert cool-down

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Dilution refrigerator insert system providing top-loading of the sample directly into mixture. 

  • Top-loading of the sample directly into the 3He/4He mixing chamber ensures good sample thermalisation, high stability of the thermal environment and optimum operation in high magnetic fields
  • Multi-service, multi-user access: unique design which can be used with a range of sample probes such as a Swedish rotator or high frequency co-axial lines
  • Quick and easy sample change: no need to remove the mixture during sample change, giving quicker experiment turnaround times and reducing the risk of leaks
  • Non metallic sample environment: ideal for experiments such as solid state NMR, where removing metallic material surrounding the pickup coil resonant circuit, is key to accurate measurements. Typically, field sweeps of up to 2 T/min leave the temperature of the mixture unaffected
  • Delivered with a gas handling system, which enables automatic operation of a dilution refrigerator using sophisticated software and virtual instrument drivers for LabVIEW

Every KelvinoxTLM consists of a dilution unit proividing more than 400 µW at 100 mK measured at the helium mixture phase boundary. This is part of the insert, which features a still pumping line, 1 K pot, diagnostic wiring and inner vacuum can. 

The Kelvinox400HA is made up of a primary insert and a dilution unit. It is compatible with IntegraAC, the recondensing liquid helium cryostat. IntegraAC 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. This decreases the frequency of helium refills. Cryogenic systems can be kept cold continuously, even when in stand-by mode, leading to greater freedom to schedule experimental time.

Flexibility: The KelvinoxTLM can be used for a wide range of applications

High performance: Ensures good sample thermalisation, high stability of the thermal environment and guarantee of operation in high magnetic field

Easy to use: All inserts are supplied with a gas handling system enabling automation of the insert cool down

Cost-effective: This dilution refrigerator can also be integrated into a helium recondensing dewar to minimise helium consumption

Base temperature: ≤ 15 mK
Base temperature stability: ± 1 mK
Maximum temperature: 1 K
Sample environment: Liquid
Cooling power at 100 mK: ≥ 400 µW (guaranteed), ≥ 600 µW (typical)
  • Semiconductor Quantum Hall effect
  • Quantum dots
  • Single electron tunnelling
  • Quantum computing Magneto-resistance
  • Hall effect
  • RF transport high frequency conductivity
  • Solid state physics heavy fermion systems
  • Metal insulator transition
  • Spin glass
  • Mesoscopic systems
  • Giant magnetic resistance Specific heat
  • De Haas-van alphen oscillations
  • Solid state NMR
  • Electrical resistivity
  • Magneto-resistance
  • Neutron scattering
  • Superconductivity low Tc superconductors
  • Quantum computing
  • Josephson junctions
  • Flux vortices
  • Quantum initial phenomena electrical resistivity
  • Scanning spectroscopy (STM/AFM)
  • SQUID characterisation 
  • AC susceptibility
  • Astrophysics & cosmology Low temperature detectors
  • Superconducting tunnel junctions
  • GE bolometers Electrothermal measurements
  • Voltage biased measurements
  • Low energy photon detection
  • Metrology Quantum hall effect
  • Voltage standards
  • Current standards Magneto-resistance
  • DC & AC low frequency transport and magnetic measurements
  • Single electron tunnelling


IntegraAC - recondensing helium cryostat

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