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Spectrostat®NMR liquid helium (LHe) continuous flow cryostat for use with NMR magnets

SpectrostatNMR liquid helium (LHe) continuous flow cryostat for use with NMR magnets

Spectrostat®NMR liquid helium (LHe) continuous flow cryostat for use with NMR magnets

The SpectrostatNMR offers a cryogenic system constructed of non-magnetic materials to provide a variable temperature sample environment from 2.7 to 500 K for nuclear magnetic resonance (NMR) experiments.

  • Compatibility with industry standard NMR spectrometers
  • Available with tail diameters of 51, 70 and 86 mm
  • Sample in exchange gas allowing fast change times for high sample throughput
  • Optimised thermal design providing excellent control and stability of the sample temperature

Applications

  • Designed for nuclear magnetic resonance experiments, when used inside an NMR magnet
  • In solid state NMR, variable temperatures may be used to study intramolecular rearrangements or to slow down chemical processes to study reactive intermediates
  • The SpectrostatNMR can also be fitted in an electromagnet for magneto-transport or Kerr effect measurements

Operation

The SpectrostatNMR works on a continuous flow principle using an oil-free pump to draw liquid helium from a storage dewar, along a transfer tube, to a heat exchanger. Temperature control is achieved by balancing manual control of helium flow and power dissipated in an electrical heater, regulated using a temperature controller.

The SpectrostatNMR will also operate with liquid nitrogen (LN2) as coolant for measurements to 80 K.

Options

  • Dimensions
    • The SpectrostatNMR is available with a choice of three tail diameters (51, 70 &86 mm)
    • Please specify the required cryostat length at time of order
  • Temperature control and options
    • Choose either a compact benchtop, single-channel ITC601 or the flexible single- or 3-channel ITC503
    • The high temperature limit may be extended to 500 K with the High Temperature (HT) option
  • Pump options
    • A simple oil-free vane pump GF4 is supplied for operation to ~3 K
    • Lower temperatures require an EPS40 single stage rotary pump
  • LHe transfer
    • An automated  needle valve can be fitted to the LLT transfer tube to allow automation of the helium flow regulation and optimisation of the liquid helium consumption

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