A typical system consists of

  • OptistatCF helium cryostat
  • Sample holder and rod
  • Up to five sets of windows. (four radial; one axial); each set includes three windows (inner, radiation shield and outer case windows)
  • Cryogen transfer tube
  • Mercury iTC temperature controller
  • High vacuum pumping system
  • Helium dewar

Optional items

  • Gas flow pump
  • Gas flow controller
  • Automated transfer tube allowing fully automated control across the entire temperature range
  • Wiring and electrical connections to the sample
  • Simple height adjust and rotate sample rod: provides sliding adjustment with locking screws to hold a fixed position. The range of vertical motion is 32 mm; positioning accuracy is 0.5 mm( height) and 1 degree (rotation)
  • Precise height adjust and rotate sample rod provides height adjust and with a resolution of 10 µm and a goniometer for setting the rotation angle with a resolution of 12 minutes
  • Liquid cuvette for liquid samples

 Sample environment options

  • OptistatCF with static exchange gas: the circulating cryogen does not come into contact with the sample. The heat exchanger is in good thermal contact with the sample space which contains an independent exchange gas (usually helium). The sample is cooled by conduction through the exchange gas
  • OptistatCF with dynamic exchange gas: temperature stabilised cryogen flows into the exchange gas space cooling the sample directly. This version is recommended for large low conductivity samples or when large heat loads are applied to the sample. Also the cryostat can be used in single shot mode. The sample space is then filled with helium and pumped enabling a base temperature of 1.6 K for approximately 20 minutes (using an EPS 40 pump)
  • If you require a vacuum sample environment then please visit the OptistatCF-V web page. 

Window options

  • A wide range of window materials can be fitted to the OptistatCF to meet specific spectroscopy applications
  • Special windows with non-parallel faces and anti-reflection coatings are available
  • Additional or replacement window flanges available via the Oxford Instruments Direct - Cryospares® online catalogue

Pump options

  • A simple oil-free vane pump GF4 is supplied for operation to 3.4 K
  • Lower temperatures to 2.3 K require an EPS40 single stage rotary pump; this also extends the base temperature for the dynamic exchange gas version to 1.6 K

Transfer lines

  • Oxford Instruments Low Loss Transfer tubes (LLT) use the cold gas exiting the cryostat to cool the shields surrounding the incoming liquid within the transfer tube. As a result, the consumption of our cryostats is the lowest on the market, dramatically reducing your running costs
  • We can also offer an extra flexible transfer tube for those with restricted space in their labs. Please note that as this does not use the gas cooled mechanism, helium consumption will be higher than for the LLT range. However it will be well suited to those who need a lightweight and more flexible transfer tube
  • An auto needle valve can be fitted to the LLT which allows the temperature controller to optimise the helium flow rate


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