Micro-PL Cryostat: 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.

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)