The CS204-DMX-20-OM is our ultra low vibration closed cycle cryostat for optical microscopy applications, such as micro-photoluminescence (Micro-PL).

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

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.



  • Micro-photoluminescence (Micro-PL)
  • Micro-Raman
  • Micro-spectroscopy
  • Micro-FTIR
  • Quantum dots
  • Low vibration optical experiments
  • Magneto-optical Kerr effect (MOKE)



  • Ultra low vibrations (3-5 nm)
  • Supports working distances as small as 1.5 mm
  • Continuously adjustable sample holder (1.5 - 7 mm)
  • Low profile windows
  • Cold tip down orientation
  • Fully customizable


Micro-PL Cryostat: CS204-DMX-20-OM

Base Temperature
    • Cold head (DE-204AF)
    • Compressor (ARS-4HW)
    • 2 helium hoses
    • DMX-20 ultra low vibration interface
    • Aluminum vacuum shroud with one window port for optical microscopy and electrical experiments
    • Nickel plated OFHC copper radiation shield
    • 1 high purity quartz window
    • 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
    • Sample holder for micro-spectroscopy experiments
    • Temperature controller
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