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The CS210-GMX-20B is our ultra low vibration closed cycle cryostat for UHV applications. The ARS manufactured GMX-20B interface, like our "B" series cold heads, is a true UHV system (10-11 Torr) where all of the rubber o-ring seals have been replaced with welded joints and metal seals. A CF flange is directly welded to the interface.

The GMX-20B also has the advantage of being easily bakeable to 200 C because the DE-210 cold head can be quickly removed from the GMX-20B interface without breaking vacuum.

The GMX-20 interface opens up a wide range of capabilities never before possible with a closed cycle cryocooler. The GS204-DMX-20-OM uses a helium exchange gas to decouple the sample from the cold tip of the DE-210 cryocooler. This prevents almost all vibration from being transmitted to the sample. Scientists have demonstrated vibration levels as low as <10 nm with the GMX-20 Series of interfaces.

Because the exchange gas is inherently less efficient than cooling by conduction, the base temperature of the sample will be ~1 K higher than the cryocooler. Additionally the GMX-20 interface requires a downward orientation of the cold tip to facilitate convective cooling of the exchange gas.

Applications

  • Low vibration UHV applications
  • Microscopy applications
  • Surface science
  • Nanomaterials
  • Quantum Science

Features

 

Typical Configuration

 

Options & Upgrades

  • Ultra low vibrations (<10 nm)
  • True UHV (10-11 Torr)
  • Bakeable to 200 C with cold head removed
  • Open sample space
  • Cold tip down orientation
  • Fully customizable

 

  • Cold head (DE-210SF)
  • Compressor (ARS-10HW)
  • 2 helium hoses
  • GMX-20B ultra low vibration interface
  • 8" rotatable CF flange
  • Nickel plated OFHC copper radiation shield terminating 0.125" short of the cold tip
  • Instrumentation for temperature measurement and control:
    • 10 pin UHV feedthrough
    • 50 ohm thermofoil heater
    • Silicon diode sensor curve matched to (± 0.5 K) for control
    • Calibrated silicon diode sensor (±12 mK) with 4 in. free length for accurate sample measurement
  • Wiring for electrical experiments:
    • 10 pin feedthrough
    • 4 copper wires
  • Sample holder for optical and electrical experiments
  • Temperature controller