10 K Cryocoolers — Sample in Exchange Gas

Janis exchange gas systems offer two main advantages to the experimenter: rapid sample exchange while the refrigerator is operating, and efficient cooling for non-conductive or irregularly shaped samples not easily clamped to a cold finger (e.g., powders, liquid solutions, etc.). These advantages are made possible by using the refrigerator to cool a column of helium exchange gas surrounding the sample. The sample is inserted, via a long rod, into a nearly isothermal region of the gas column for cooling. Sample exchange simply consists of removing the sample rod, switching samples on the rod, and reinserting the rod into the cryostat. The entire sequence takes only a matter of minutes and is performed while the refrigerator is operating. Thus the time to cool successive samples is greatly reduced over cold finger cryostat.

Standard configuration

"XX" indicates the cold head for the system. "00" for SHI cold heads and "50" for CTI cold heads.

  • Optical
    • Cooler mounted below the sample chamber: CCS-5XX
    • Cooler mounted above the sample chamber: CCS-9XX
  • Non-optical
    • Cooler mounted below the sample chamber: CCS-5XXT
    • Cooler mounted above the sample chamber: CCS-9XXT

Features:

  • Isothermal static helium gas sample chamber
  • Optical vacuum jacket and radiation shield (Models CCS-550, CCS-950)
  • Gold plated OFHC copper sample holder
  • 10-pin electrical feedthrough for customer wiring into the sample area
  • Two spare electrical access ports
  • Evacuation valve and safety pressure relief
  • Model 8200 compressor and 10 ft gas lines

Available options:

  • Additional electrical feedthroughs (BNC, SMA, multipin, and others)
  • Additional window ports
  • O-ring or epoxy sealed windows
  • Cooled radiation shield windows
  • Indium sealed strain relief mounted cold windows
  • IR and other window materials
  • Larger or smaller diameter sample chamber
  • Special sample positioners, including a double rotating sample positioner for sample rotation about the optical axis (Model CCS-950)
  • Custom configurations

Lake Shore — environment by JANIS

CCS-950 10 K CCR

Model CCS-550 optical, cooler mounted below sample chamber, sample in exchange gas 10 K cryocooler with CTI cold head

Janis exchange gas refrigerators are available in two geometries. The CCS-550 offers the cooler mounted below the sample chamber. The CCS-550 is somewhat smaller and more portable and can be easily mounted on optical tables or between the gap of some electromagnets. CCS-550 10 K CCR

Model CCS-950 optical, cooler mounted above sample chamber, sample in exchange gas 10 K cryocooler with CTI cold head

Janis exchange gas refrigerators are available in two geometries. The CCS-950 offers the cooler mounted either above the sample chamber. The CCS-950 permits the sample region to be inserted into the sample chamber of a spectrometer or the room temperature bore of a superconducting magnet. CCS-950 10 K CCR CCS-950 drawing

Model CCS-550T non-optical, cooler mounted below sample chamber, sample in exchange gas 10 K cryocooler with CTI cold head

Janis exchange gas refrigerators are available in two geometries. The CCS-550T offers the cooler mounted below the sample chamber. The CCS-550T is somewhat smaller and more portable and can be easily mounted between the gap of some electromagnets. CCS-550T drawing

Model CCS-950T non-optical, cooler mounted above sample chamber, sample in exchange gas 10 K cryocooler with CTI cold head

Janis exchange gas refrigerators are available in two geometries. The CCS-950T offers the cooler mounted either above the sample chamber. The CCS-950T permits the sample region to be inserted into the sample chamber of a spectrometer or the room temperature bore of a superconducting magnet. CCS-950T drawing