Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

High sensitivity leak detection method and apparatus

Patent ·
OSTI ID:869475
 [1]
  1. Grafton, VA
+ Show Author Affiliations

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.

Research Organization:
SOUTHEASTERN UNIV RESCH ASSN
DOE Contract Number:
AC05-84ER40150
Assignee:
Southeastern Universities Research Association (Newport News, VA)
Patent Number(s):
US 5343740
OSTI ID:
869475
Country of Publication:
United States
Language:
English

Similar Records

High sensitivity leak detection method and apparatus
Patent · Tue Sep 06 00:00:00 EDT 1994 · OSTI ID:6978732
High sensitivity He desorption leak detection method
Journal Article · Thu Jul 01 00:00:00 EDT 1993 · J. Vac. Sci. Technol. A 11, 1598 (1993) · OSTI ID:791701
High sensitivity He desorption leak detection method
Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (United States) · OSTI ID:6037224

Related Subjects

-1
-18
/73/62/
10
accumulated
adsorption
analyzers
apparatus
associated
atm
atm cc
capable
cc
common
cyclic
desorption
detecting
detecting leaks
detection
detection method
detectors
disclosure
drift
eliminated
gas
gas analyzer
helium
helium temperatures
improved
integration
leak
leak detection
leak detector
leaks
metallic
metallic surface
method
method provide
method provides
non-porous
porous metal
porous metallic
provided
provides
provides reliable
reliable
reliable leak
residual
residual gas
sensitivity
superfluid
surface
technique
temperatures
time
time integration
times
utilizes
utilizing
virtually
virtually eliminate
virtually eliminated
zero