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Title: 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:
 [1]
  1. (Grafton, VA)
Issue Date:
Research Org.:
SOUTHEASTERN UNIV RESCH ASSN
OSTI Identifier:
869475
Patent Number(s):
5343740
Assignee:
Southeastern Universities Research Association (Newport News, VA) TJNAF
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 = {1994},
month = {1}
}

Patent:

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