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 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 cryostats.
Janis exchange gas refrigerators are available in two geometries: with the cooler
mounted either above (CCS-950/950T) or below (CCS-550/550T) the sample
chamber. The CCS-550/550T are somewhat smaller and more portable and can be
easily mounted on optical tables or between the gap of some electromagnets. The
CCS-950/950T permit the sample region to be inserted into the sample chamber of
a spectrometer or the room temperature bore of a superconducting magnet.
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Available options:
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Additional electrical feedthroughs (BNC, SMA, multipin, and others)
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Additional window ports
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O-ring or epoxy sealed windows
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Cooled radiation shield windows
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Indium sealed strain relief mounted cold windows
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IR and other window materials
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Larger or smaller diameter sample chamber
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Special sample positioners, including a
double rotating sample positioner for sample
rotation about the optical axis
(Model CCS-950) -
Custom configurations
Features:
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Isothermal static helium gas sample chamber
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Optical vacuum jacket and radiation shield (Models CCS-550, CCS-950)
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Gold plated OFHC copper sample holder
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10-pin electrical feedthrough for customer wiring into the sample area
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Two spare electrical access ports
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Evacuation valve and safety pressure relief
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Model 8200 compressor and 10' gas lines
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Please click here for the specifications of
Models CCS-550, CCS-550T, CCS-950 & CCS-950T,
as well as the mechanical drawings of Model CCS-550 & CCS-550T.
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Table of Contents | |
Pages |
| Introduction
| | 1,
2 |
| CCS-150
& CCS-450 Standard Optical Systems
| | 3, 4 |
| CCS-100/202 & CCS-100/204 Standard Optical Systems | |
5,
6 |
| CCS-350,
CCS-350S & CCS-350R Compact Optical Systems
| | 7, 8 |
| CCS-250,
CCS-350T & CCS-350ST Non-Optical Systems
| | 9, 10 |
| CCS-550,
CCS-550T, CCS-950, CCS-950T Top Loading Exchange Gas Systems
| | 11, 12 |
| CCS-750
Vibrating Sample Magnetometry Systems
| | 13 |
| CCS-850
Mössbauer Spectroscopy Systems | |
14,
15 |
| Other
Systems (including CS-1020)
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16 |
| Model 8200
Compressor Specifications
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17 |
| Options and Accessories
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18 |
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