An Introduction To Helium Leak Detection Technology Darrell R. Morrow, PhD Leak Detection Associates, Inc. Blackwood, New Jersey.

Slides:

Advertisements

Similar presentations

Principles of Various Leak Detection Techniques Used in the Canning Industry Ovec Systems Limited Notes:

Advertisements

QUALITY ASSURANCE OF LARGE AREA RPC DETECTOR : TECHNIQUES FOR MEASUREMENT OF GAS LEAK RATE By Avinash V. Joshi Alpha Pneumatics, Mumbai (India)

Mr. ShieldsRegents Chemistry U05 L09 John Dalton (1766 – 1844) - Developed the Law of Partial Pressures (abt. 1801)

Inert Gas Purification Systems Why do we need them??? Many of the materials used in research and development today are extremely air sensitive, and can.

1 Chapter 6 Gases 6.8 Partial Pressures (Dalton’s Law) Copyright © 2009 by Pearson Education, Inc.

DETERMINATION OF VACUUM SPHERE OF INFLUENCE SURROUNDING BIOGAS EXTRACTION WELLS BY A LOW EXPENSIVE IN SITU METHODOLOGY USING A TRACER GAS Tommaso Pandolfi.

© 2013 TriQuint Semiconductor, Inc. Automation of RGAs and Sensors for FDC of PVD Metal Thin Film Processing Arif Choudhury 1, Eric McCormick 1, Guy Takayesu.

Gases Chapter 5 Web-site:

Monitoring Air Quality: Emissions and Odor From A Swine Finishing Livestock Facility.

SAFETY, TOOLS & EQUIPMENT, SHOP PRACTICES

Gases Chapter 11.

Patricia Aguar Bartolomé Institut für Kernphysik, Universität Mainz PSTP 2013 Workshop, Charlottesville 11th September 2013.

I n t e g r i t y - S e r v i c e - E x c e l l e n c e Headquarters U.S. Air Force 1 Direct Sampling Ion Trap Mass Spectrometry Rob R. Smith Oak Ridge.

Flame photometry.

High-Vacuum Technology Course

Center for Materials for Information Technology an NSF Materials Science and Engineering Center Vacuum Fundamentals Lecture 5 G.J. Mankey

Vacuum increases the mean-free-path of gas molecules.mean-free-path Vacuum prevents chemical reaction. Vacuum removes contaminants from surfaces.contaminants.

Austar Coal Mine The Positive Pressure Chamber Austar Coal Mine & Joncris Sentinel Services Proactive: - Spontaneous & Combustible Gas Management - Seal.

Shielding Gases - A major consumable in Welding l On an average 2 Tons of gas used per tonne of wire l Extensive research on Shielding gases to improve.

1 Chapter 6 Gases 6.6 The Combined Gas Law. 2 The combined gas law uses Boyle’s Law, Charles’ Law, and Gay-Lussac’s Law (n is constant). P 1 V 1 =P 2.

Basics of Vacuum Technology Unit: Pa = N/m 2 = J/m 3 UnitPa or N/m 2 bar10 5 mbar100 atm= 760 torr x 10 5.

The Nature of Liquids. A Model for Liquids According to the kinetic theory, both the particles that make up gases and liquids have motion. While particles.

ENERGY AUDIT INSTRUMENT

An Overview of Package and Seal Integrity Testing Darrell R. Morrow, PhD Leak Detection Associates, Inc. Blackwood, New Jersey.

Photoelectron Spectroscopy Lecture 5 – instrumental details –General spectrometer design –Vacuum generation and measurement.

Pressure 1 atmosphere ~ 1 bar ~ 760 mm Hg ~ 760 torr ~ 100,000 Pa Ion gauges read in mbar i.e. 1x mbar = 1x atm. Sometimes ion gauges read.

A sample of neon gas at atm compresses from L to L

GCMS: gas chromatography and mass spectrometry

Tools Available for Real-Time Exposure Assessment Phil Smith, PhD, CIH CDR MSC, USN

Chad Orzel Union College Physics Radioactive Background Evaluation by Atom Counting C. Orzel Union College Dept. of Physics and Astronomy D. N. McKinsey.

NON-TRACER GAS METHODS TO EVALUATE ISOLATION DAMPER LEAKAGE Peter Lagus, Ph.D., CIH Lagus Applied Technology, Inc Joe Bendyk Exelon Limerick Station.

What is plasma? Plasma is an ionized gas comprising molecules,atoms, ions ( in their ground or excited states) electrons and photons. It is electrically.

 No definite shape ◦ It fills its container  Compressible ◦ With increases in pressure  Low Density ◦ Molecules are far apart ◦ Intermolecular forces.

Chapter 27 Gas Chromatography 1. Principles

Burle Leak Check 3/19/2012 Jeff Williams Jun Xie.

Methods and Tehniques in Surface Science Prof. Dumitru LUCA “Alexandru Ion Cuza” University, Iasi, Romania.

Vacuum Fundamentals 1 atmosphere = 760 mm Hg = kPa 1 torr = 1 mm Hg vacuum range pressure range low 760 ~ 25 torr medium 25~ high ~ 10.

Homework Check (The Ideal Gas Law) 1.If I contain 3 moles of gas in a container with a volume of 60 L at a temperature of 400 K, what is the pressure inside.

Vacuum Fundamentals 1 atmosphere = 760 mm Hg = kPa 1 torr = 1 mm Hg vacuum range pressure range low 760 ~ 25 torr medium 25~ high ~ 10.

b The good news is that you don’t have to remember all three gas laws! Since they are all related to each other, we can combine them into a single equation.

Mass spectrometry (Test) Mass spectrometry (MS) is an analytical technique that measures masses of particles and for determining the elemental composition.

Chapter 14-3 I. Avogadro’s Principle A. Equal volumes of gases at same T and P contain equal #’s of molecules B. H 2 + Cl 2 → 2HCl 1 vol. 1 vol. 2 vol.

General, Organic, and Biological Chemistry Copyright © 2010 Pearson Education, Inc. 1 Chapter 7 Gases 7.9 Partial Pressure (Dalton’s Law)

Chapter 14-3 I. Avogadro’s Principle A. Equal volumes of gases at same T and P contain equal #’s of molecules B. H 2 + Cl 2 → 2HCl 1 vol. 1 vol. 2 vol.

Oxygen Permeation Measurements Across Films using OxySense® luminescence Technology Devinder Saini OxySense Inc S. Eastern Ave Suite 14G Las Vegas,

Fabrication and measurement of RF components for CLIC study

Ideal Gas Law PV = nRT P= pressure (atm) V= volume (L)

Chamber Quality Control Before the construction several checks are performed on:  Panels (cathode and pad PCB)  GEM foil Tests on assembled detector.

Outgassing Test and the Getter Specification

Applications as Residual Gas Analyzer (RGA)

Vacuum Systems I basic concepts

Quadrupole Mass Spectrometry Concepts Mass Spectrometers for Residual Gas Analysis.

HELIUM LEAK TEST OF INNER BORE WELDS OF TUBE#TUBESHEET JOINT

DALTON’S LAW OF PARTIAL PRESSURE, AVOGADRO’S LAW, IDEAL GAS LAW MS. ANA D. HIRANG SY

13.1 The Nature of Gases > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chapter 13 States of Matter 13.1 The Nature of.

Leak Detection method for Vacuum Systems Alexander Permogorov

Thin Film Technology - Student Talk Sophie Chauvin 02/02/16 Leak Detection method for Vacuum Systems 1.

Thermal Conductivity Detector

High Performance Liquid Chromatography Presented by Dr. Kamal Modi 2 nd Year Resident.

Vacuum Systems for Electron Microscopy Constraints on Specimens Specimens placed in the electron microscope must be able to withstand very high vacuum.

Energy measuring Instruments

Continuous Flow Isotope Ratio Mass Spectrometry

Ti/SS transitions A.Basti INFN-PISA*

Vacuum At LLO 2016 SURF Udochu, Ogbonnaya LIGO-T

The sensor spot: an optically-based, non-invasive integrity test for modified atmosphere packaging S. te Lintel Hekkert, PhD This is the opening slide,

Kinetic Theory and a Model for Gases

BASIC VACUUM PRACTICE.

Kinetic Theory and a Model for Gases

Presentation transcript:

An Introduction To Helium Leak Detection Technology Darrell R. Morrow, PhD Leak Detection Associates, Inc. Blackwood, New Jersey

Why Helium? F Low Background (5-20 PPM) F Inert F Safe F Light F Low Cost ? He N O F Ne Cl Ar Kr Xe H

Why A Helium Leak Detector? SIMS 180TD+ F High Sensitivity F Wide Range F Reliable F Quantitative F Dynamic Testing F NIST Traceable

Analyzer Cell 180 o Deflection +200V VAR. FILAMENT GROUND TRIODE PLATE HEAVY IONS HELIUM IONS LIGHT IONS REPELLER HIGH POWER SUPPLY LOG AMPS - + TARGET RESISTANCE HIGH VACUUM GAUGE GROUND MAGNET

Helium Test Methods “Hard” Vacuum Helium Pre-Filled Samples SIMS 180TD+ 1E-2 mbar

Helium Leak Methods Sniffing Test He 100% He SIMS 180TD+ ALCATEL

Helium Leak Testing: Vacuum Mode F The “hard” vacuum test procedure measures the package’s cumulative leak rate arising from all sources within the sample. F This method enables the barrier performance of seals to be quantified.

Helium Leak Testing: Sniffer Mode F Individual packages containing helium can be checked for leaks using a pencil-sized vacuum collector (sniffer) attached to a helium leak detector. F The rate of gas sampling (flow rate) is set at 1cc/second; enabling a (ambient pressure) leak rate to be measured in ppm, or in cc/second. F The sniffer mode test procedure is “site- specific” in that the probe collects helium escaping within ~ 1/8” of the leak site.

Virtual Leaks and Outgassing Virtual leaks are small trapped volumes of gas at atmospheric pressure within the vacuum envelope which communicates with the vacuum system by means of minute crevices, cracks, grooves, etc. Outgassing is the desorption of atmospheric gases and contamination from the surface area within the vacuum system.

Fine Leak Rate Reality Theoretical hole diameter calculation in molecular flow regime D = M L 1 6Q RT P 1 -P 2 CONDITIONS 1E-6 atm cc/sec. He leak rate 0.6 cm. wall thickness 20 C ambient temperature Inboard He spray test D = 4 (.6)(1)(6E-6) (8.32E7)(293) Size (microns) ,000 10,000 Pollen Microbes Lint Tobacco smoke Household dust Industrial dust Acid fumes Gas molecules Finger prints Alcohol residue D =.0009 cm. = 0.9 microns 1 meter = 1,000,000 microns

Pharmaceutical/Device Package Test Methods F Leak Test Methods Principles u The most common concept behind the « rapid » detection of leaks in various packaging forms is the monitoring of changes in specific physical parameters such as fluid (gas/vapor/liquid) transport from one side of a « sealed » package to the other, such as bubble formation or pressure changes.

Pharmaceutical/Device Package Test Methods F Existing Test Methods u Bubble Generation Test - Vacuum (ASTM D ) u Bubble Generation Test - Internal Pressurization (ASTM F ) u Pressure Decay Test u Dye Penetration Test u Tracer Gas Leak Detection Test/s - Helium, Oxygen, Argon, CO 2