CS210-GMX-20B

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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-20B 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

Typical Configuration

  • 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

Features

  • 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

 Options & Upgrades