Multi-stage pulse tube with matched temperature profiles

Details Multi-stage pulse tube with matched temperature profiles Multi-stage pulse tube with matched temperature profiles

2006-01-17

2009-08-04

Doerrler, William C (Department: 3744)

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

Reexamination Certificate

active

07568351

ABSTRACT:
Convection losses associated with different temperature profiles in the pulse tubes and regenerators of multi-stage pulse tubes mounted in helium gas in the neck tube of a MRI cryostat are reduced by providing one or more of thermal bridges, and/or insulating sleeves between one or more pulse tubes and regenerators, and/or spacers, and spacer tubes, in one or more pulse tubes and regenerators.

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