CS204-DMX-20-OM

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.

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Applications

  • Micro-photoluminescence (Micro-PL)

  • Micro-Raman

  • Micro-spectroscopy

  • Micro-FTIR

  • Quantum dots

  • Low vibration optical experiments

  • Magneto-optical Kerr effect (MOKE)

Typical Configuration

  • 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

Features

  • 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

Options & Upgrades

  • 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)