Method and devices to reduce vibrations in a cryostat

Details Method and devices to reduce vibrations in a cryostat Method and devices to reduce vibrations in a cryostat

1998-01-22

2001-01-23

Capossela, Ronald (Department: 3744)

Refrigeration

Storage of solidified or liquified gas

Including cryostat

C062S046100

Reexamination Certificate

active

06176088

ABSTRACT:

BACKGROUND OF THE INVENTION
A. Field of the Invention
The invention relates to the field of reducing turbulence in a fluid.
B. Related Art
In the field of energy dispersive x-ray analysis, vessels known as Dewars or cryostats are commonly used to cool the x-ray detectors to cryogenic temperatures. The cryostats are commonly filled with liquid nitrogen, but can be filled with any cryogenic liquid. Due to imperfections in the insulation of the cryostats, the cryogenic liquid may boil violently. The boiling results turbulence, which leads to vibration, which in turn can cause deterioration in the resolution of the x-ray detector.
Even when the boiling is of the nucleate type, from “hot” walls of the vessel, significant turbulence may occur. “Hot” in this context is of course relative to the temperature of the cryogenic liquid.
SUMMARY OF THE INVENTION
The object of the invention is to reduce turbulence in a fluid.
The object is achieved by using a porous material in the fluid.
The invention can also be used to distribute heat transfer throughout a fluid or reduce mass transfer throughout a fluid.


REFERENCES:
patent: 2662379 (1953-12-01), Reich
patent: 3069042 (1962-12-01), Johnston
patent: 3142159 (1964-07-01), Berlad
patent: 3258602 (1966-06-01), Promish
patent: 3302415 (1967-02-01), Royet
patent: 3950960 (1976-04-01), Kawam
patent: 4259846 (1981-04-01), Rudolphi et al.
patent: 4385499 (1983-05-01), Lam
patent: 4756163 (1988-07-01), Garg

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