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The CS204F-DMX-20 opens up a wide range of capabilities never before possible with a closed cycle cryocooler. The CS204F-DMX-20 uses a helium exchange gas to decouple the sample from the cold tip of the DE-204 cryocooler. This prevents almost all vibration from being transmitted to the sample. Scientists have demonstrated vibration levels as low as 3-5 nm with the CS204F-DMX-20.

Because the exchange gas is inherently less efficient than cooling by conduction, the base temperature of the sample will be 1-2 K higher than the cryocooler. Additionally the DMX-20 interface requires a downward orientation of the cold tip to facilitate convective cooling of the exchange gas.

The CS204F-DMX-20 is ideally suited for Mössbauer experiments and vibrationally sensitive transport measurements. For optical microscopy applications, such as Micro Raman, Micro PL, and quantum dots, the CS204F-DMX-20-OM is preferred.

Applications

  • Mössbauer
  • Low vibration optical experiments
  • Quantum dot
  • Photoluminescence
  • Micro-Raman 
  • Micro-photoluminescence (Mirco-PL)
  • Micro-spectroscopy
  • Magneto Optical Kerr Effect (MOKE)
  • Nanoscience
  • Ellipsometry

Features

 

Typical Configuration

 

Options & Upgrades

  • Ultra low vibrations (3-5 nm)
  • Pop-off optical block for easy in-situ sample change
  • Beryllium and Kapton windows available for Mössbauer experiments
  • Large, clear view optical windows (1.25 in.)
  • Large sample viewing angle for optical collection (F/1.4)
  • Cold tip down orientation
  • Fully customizable

 

  • Cold head (DE-204AF)
  • Compressor (ARS-4HW)
  • 2 helium hoses
  • DMX-20 ultra low vibration interface
  • Aluminum vacuum shroud for optical and electrical experiments with 4 window ports on a pop-off optical block
  • Nickel plated OFHC copper radiation shield
  • 2 high purity quartz windows
  • Instrumentation for temperature measurement and control:
    • 10 pin hermetic 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