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.-18 atm cc sec.sup.-1.
- Inventors:
-
- Grafton, VA
- Issue Date:
- Research Org.:
- Southeastern Universities Research Associations (SURA), Washington, DC (United States)
- OSTI Identifier:
- 869475
- Patent Number(s):
- 5343740
- Assignee:
- Southeastern Universities Research Association (Newport News, VA)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F04 - POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS F04B - POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
- DOE Contract Number:
- AC05-84ER40150
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- sensitivity; leak; detection; method; apparatus; improved; provided; utilizes; cyclic; adsorption; desorption; accumulated; helium; non-porous; metallic; surface; provides; reliable; superfluid; temperatures; zero; drift; associated; residual; gas; analyzers; common; detectors; virtually; eliminated; utilizing; time; integration; technique; disclosure; capable; detecting; leaks; times; 10; -18; atm; cc; -1; residual gas; virtually eliminated; detection method; leak detection; porous metal; method provides; leak detector; method provide; detecting leaks; time integration; porous metallic; reliable leak; provides reliable; gas analyzer; virtually eliminate; helium temperatures; metallic surface; atm cc; /73/62/
Citation Formats
Myneni, Ganapatic R. High sensitivity leak detection method and apparatus. United States: N. p., 1994.
Web.
Myneni, Ganapatic R. High sensitivity leak detection method and apparatus. United States.
Myneni, Ganapatic R. Sat .
"High sensitivity leak detection method and apparatus". United States. https://www.osti.gov/servlets/purl/869475.
@article{osti_869475,
title = {High sensitivity leak detection method and apparatus},
author = {Myneni, Ganapatic 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.-18 atm cc sec.sup.-1.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1994},
month = {Sat Jan 01 00:00:00 EST 1994}
}
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