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1
Introduction
Closed-Cycle Cryogenic System
Figure 2
Agilent Cold Probe and cryogenic system
CryoBay (cryogenics bay)
14
The Agilent Closed- Cycle Cryogenic System,
designed for continuous long- term operation. During normal
operations, the system does not consume or require
additional He after initial setup. Routine service operations
utilize some He gas.
The system cools the probe components to their operating
temperature in about 4 hours. Optimal performance is
realized when the system is allowed to stabilize overnight.
The Closed- Cycle Cryogenic system consists of the following
units:
• Closed- cycle chiller (CCC) or helium (He) refrigerator
The CCC supplies cold He gas to the cryogenic heat
exchanger inside the Agilent Cold Probe.
• Valve Box / Control Board
Figure
2, is
Cryogenic Systems Operation
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