CS202-DMX-20

The CS202F-DMX-20 opens up a wide range of capabilities never before possible with a closed cycle cryocooler. The CS202F-DMX-20 uses a helium exchange gas to decouple the sample from the cold tip of the DE-202 cryocooler. This prevents almost all vibration from being transmitted from the cryocooler to the sample. Scientists have demonstrated vibration levels as low as 3-5 nm with the CS202F-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 CS202F-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—please check out our CS204F-DMX-20-OM.

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-202AE)
• Compressor (ARS-4HW)
• 2 helium hoses
• DMX-20 ultra low vibration interface
• Aluminum vacuum shroud with 4 window ports and pop-off optical block for optical and electrical experiments
• 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 hermetic feedthrough
  • 4 copper wires
• Sample holder for optical and electrical experiments
• Temperature controller

• 4 K cold head (0.2 W @ 4.2 K) CS204SE-DMX-20 (DE-202S not recommended)
• 6 K cold head (3 W @ 10 K) CS204PE-DMX-20 (DE-202P not recommended)
• Turbo upgrade for faster cooldown times
• 450 K high temperature interface (Not required with the DMX-20 interface, but the 450 K interface is helpful for high temperature performance.)
• 800 K high temperature interface
• Custom temperature sensor configuration (please contact our sales staff)
• Custom wiring configurations (please contact our sales staff)
• Beryllium windows for Mössbauer experiments
• Kapton windows for Mössbauer experiments
• Window material upgrades (custom materials available)
• Sample holder upgrades (custom sample holders available)