The CS204-FMX-1SS is our standard intermediate cooling power cryostat for optical and electrical measurements. This high performance system offers an all stainless steel constructed vacuum shroud along with a welded stainless steel instrumentation skirt. This system is capable of achieving vacuum levels of 10-7 Torr with an appropriate vacuum system. The nickel plated copper radiation shield provides low emissivity which is ideal for low temperature experiments.

The CS204-FMX-1SS is powered by our DE-204 series closed cycle cryocooler. WIth twice the 4K cooling power of the DE-202 cryocooler, the base temperature of this system is much more forgiving of experimental and parasitic sources of heat load.


  • Optical
  • Electro-optical
  • Raman
  • UV, VIS, IR
  • FTIR
  • Electroluminescence
  • Photoluminescence
  • Resistivity
  • Hall probe experiments
  • Diamond anvil cell
  • Deep-level transient spectroscopy (DLTS)
  • Thermal, electrical and magnetic susceptibility
  • Magneto-optical Kerr effect (MOKE)



Typical Configuration


Options & Upgrades

  • Cryogen free GM cryocooler
  • Welded stainless steel construction
  • Large, clear view optical windows (1.25 in.)
  • Large sample viewing angle for optical collection (F/# = 1)
  • Fully customizable


  • Cold head (DE-204AI)
  • Compressor (ARS-4HW)
  • 2 helium hoses
  • Stainless steel vacuum shroud with 5 window ports for optical and electrical experiments (FMX-1SS)
  • Nickel plated OFHC copper radiation shield
  • 2 high purity quartz windows
  • Instrumentation for temperature measurement and control:
    • 10 pin hermetic feedthrough
    • 36 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 feedthrough
    • 4 copper wires
  • Sample holder for optical and electrical experiments
  • Temperature controller