The ARS manufactured CS202B is a true UHV cold head (10-11 Torr) where all of the rubber o-ring seals have been replaced with welded joints and metal seals. A CF flange is welded directly to the cryocooler.

Systems built around a CS202B cold head are bakeable to 80 C. The 10 K CS202AB cryostat is bakeable to 200 C if the displacer is removed. (Special training required.)

Cold tip extensions are available to put the sample right where it is needed in the chamber. The extra cooling power of the CS204*B comes in handy when working with long cold tip extensions.


  • UHV
  • Surface science
  • UHV manipulator for XYZ motion
  • Photoemission spectroscopy



Typical Configuration


Options & Upgrades

  • True UHV (10-11 Torr)
  • Bakeable
  • Open sample space
  • Optional cold tip extensions
  • Cryogen free
  • Operation in any orientation
  • Fully customizable


  • Cold head (DE-202AB)
  • Compressor (ARS-4HW)
  • 2 helium hoses
  • True UHV welded stainless steel instrumentation skirt with 6 in. rotatable CF flange
  • Nickel plated OFHC copper radiation shield terminating 0.125" short of the cold tip
  • Instrumentation for temperature measurement and control:
    • 10 pin UHV 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