Ultra sensitive noble gas leak detector

Details Ultra sensitive noble gas leak detector Ultra sensitive noble gas leak detector

1983-06-01

1985-01-08

Kreitman, Stephen A.

Measuring and testing

With fluid pressure

Leakage

250288, 417 49, G01M 300, B01D 5944

Patent

active

044921101

ABSTRACT:
A noble gas leak detector is provided using a non-evaporable getter pump to remove active gases but not noble gases during leak detection. The vacuum system is constructed of all-metal valves, metal connection devices and metal passageways to reduce out gassing and minimize the permeation of helium into the system. Valves are appropriately located to seal off unnecessary devices during the actual leak detection. In addition, a process of calibrating a noble gas leak detector is provided using americium 241 alpha as the calibrating source.

REFERENCES:
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patent: 3227872 (1966-01-01), Nemeth
patent: 3342990 (1967-09-01), Barrington et al.
patent: 3385102 (1968-05-01), Briggs
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patent: 4260886 (1981-04-01), Grilletto et al.
Rosai, L. et al., Purification of Rare Gases and the Measurement of Residual Impurity Levels, J. Vac. Sci. Technol., vol. 11, No. 1, pp. 347-349, Jan./Feb. 1974.

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