High sensitivity leak detection method and apparatus
Abstract
An improved leak detection method is provided that utilizes the cyclic adsorption and desorption of accumulated helium on a non-porous metallic surface. The method provides reliable leak detection at superfluid helium temperatures. The zero drift that is associated with residual gas analyzers in common leak detectors is virtually eliminated by utilizing a time integration technique. The sensitivity of the apparatus of this disclosure is capable of detecting leaks as small as 1 [times] 10[sup [minus]18] atm cc sec[sup [minus]1]. 2 figs.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6978732
- Patent Number(s):
- 5343740
- Application Number:
- PPN: US 8-113718
- Assignee:
- Southeastern Universities Research Association, Newport News, VA (United States)
- DOE Contract Number:
- AC05-84ER40150
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 27 Aug 1993
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; LEAK DETECTORS; DESIGN; HELIUM; SENSITIVITY; SUPERFLUIDITY; ELEMENTS; FLUIDS; GASES; NONMETALS; RARE GASES; 440800* - Miscellaneous Instrumentation- (1990-)
Citation Formats
Myneni, G R. High sensitivity leak detection method and apparatus. United States: N. p., 1994.
Web.
Myneni, G R. High sensitivity leak detection method and apparatus. United States.
Myneni, G R. Tue .
"High sensitivity leak detection method and apparatus". United States.
@article{osti_6978732,
title = {High sensitivity leak detection method and apparatus},
author = {Myneni, G R},
abstractNote = {An improved leak detection method is provided that utilizes the cyclic adsorption and desorption of accumulated helium on a non-porous metallic surface. The method provides reliable leak detection at superfluid helium temperatures. The zero drift that is associated with residual gas analyzers in common leak detectors is virtually eliminated by utilizing a time integration technique. The sensitivity of the apparatus of this disclosure is capable of detecting leaks as small as 1 [times] 10[sup [minus]18] atm cc sec[sup [minus]1]. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 06 00:00:00 EDT 1994},
month = {Tue Sep 06 00:00:00 EDT 1994}
}
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