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

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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.

Applications

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

Features

 

Typical Configuration

 

Options & Upgrades

  • 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
     
  • 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
     
  • Transmission experiment upgrade
  • Rotatable sample platter upgrade
  • Magnet post upgrade
  • 4 K cold head (0.2 W @ 4.2 K)
  • 5.5 K cold head (3 W @ 10 K)
  • Turbo upgrade for faster cooldown times
  • High temperature interface (not required with the DMX-20 interface, but helpful for high temperature performance)
  • Custom temperature sensor configuration (please contact our sales staff)
  • Custom wiring configurations (please contact our sales staff)
  • Window material upgrades (custom materials available)
  • Sample holder upgrades (custom sample holders available)