EP0570485A1 - Method and apparatus for detecting hydrogen-containing compounds. - Google Patents

Method and apparatus for detecting hydrogen-containing compounds.

Info

Publication number
EP0570485A1
EP0570485A1 EP92905753A EP92905753A EP0570485A1 EP 0570485 A1 EP0570485 A1 EP 0570485A1 EP 92905753 A EP92905753 A EP 92905753A EP 92905753 A EP92905753 A EP 92905753A EP 0570485 A1 EP0570485 A1 EP 0570485A1
Authority
EP
European Patent Office
Prior art keywords
hydrogen
detector
alpha
particles
protons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP92905753A
Other languages
German (de)
French (fr)
Inventor
Neil James A Mc
David S Oakley
Charles E Price
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Colorado School of Mines
Original Assignee
Colorado School of Mines
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Colorado School of Mines filed Critical Colorado School of Mines
Publication of EP0570485A1 publication Critical patent/EP0570485A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T7/00—Details of radiation-measuring instruments
    • G01T7/02—Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids
    • G01T7/04—Collecting means for receiving or storing samples to be investigated and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids by filtration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
    • G01N23/2255—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident ion beams, e.g. proton beams
    • G01N23/2258—Measuring secondary ion emission, e.g. secondary ion mass spectrometry [SIMS]

Abstract

Détecteur peu couteux permettant de détecter des composés contenant de l'hydrogène dans un gaz ou des échantillons (10) à film mince. Le dispositif comprend de préférence une source de particule alpha (1), un milieu de dégradation d'énergie (13), un détecteur de particules chargé (p. ex. un détecteur à diode à semi-conducteur) (7), et des circuits d'amplification de seuil (19) de logique (22) et de synchronisation (25), un appareil de correction d'humidité (28), et un circuit d'alarme/affichage (31). L'invention se base sur l'utilisation de la feuille de dégradation d'énergie (13) pour faire passer sélectivement certaines particules. Des particules alpha énergétiques provenant d'une source radio-active (1) entrent dans l'échantillon (10) et des noyaux d'hydrogène ou des protons diffusés élastiquement par les particules alpha peuvent pénétrer dans la feuille de dégradation d'énergie (13) qui est suffisamment épaisse pour arrêter les particules alpha (4). Les protons sont détectés et un signal de sortie approprié est produit pour fournir une mesure précise de la quantité d'hydrogène dans le gaz ou dans l'échantillon à film mince. Le détecteur d'hydrogène peut être combiné à un détecteur de fumée pour produire un appareil pouvant détecter à la fois la fumée et l'hydrogène. Cette technologie peut également être utilisée pour réduire la pénétration de bruit et de lumière dans une application de détection de radon.Inexpensive detector for detecting compounds containing hydrogen in a gas or thin film samples (10). The device preferably includes an alpha particle source (1), an energy degrading medium (13), a charged particle detector (e.g., a semiconductor diode detector) (7), and logic (22) and synchronization (25) threshold amplification (19) circuits, a humidity correction apparatus (28), and an alarm / display circuit (31). The invention is based on the use of the energy degradation sheet (13) for selectively passing certain particles. Alpha energetic particles from a radioactive source (1) enter the sample (10) and hydrogen nuclei or protons elastically diffused by the alpha particles can penetrate the energy degradation sheet (13 ) which is thick enough to stop the alpha particles (4). Protons are detected and an appropriate output signal is produced to provide an accurate measure of the amount of hydrogen in the gas or in the thin film sample. The hydrogen detector can be combined with a smoke detector to produce a device that can detect both smoke and hydrogen. This technology can also be used to reduce the penetration of noise and light in a radon detection application.

EP92905753A 1991-02-06 1992-02-06 Method and apparatus for detecting hydrogen-containing compounds. Pending EP0570485A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65130491A 1991-02-06 1991-02-06

Publications (1)

Publication Number Publication Date
EP0570485A1 true EP0570485A1 (en) 1993-11-24

Family

ID=24612352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92905753A Pending EP0570485A1 (en) 1991-02-06 1992-02-06 Method and apparatus for detecting hydrogen-containing compounds.

Country Status (5)

Country Link
EP (1) EP0570485A1 (en)
AU (1) AU1362592A (en)
CA (1) CA2103574A1 (en)
GB (1) GB2267965A (en)
WO (1) WO1992014170A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043955A (en) * 1960-01-25 1962-07-10 Hughes Aircraft Co Discriminating radiation detector
US4186303A (en) * 1978-01-12 1980-01-29 Westinghouse Electric Corp. Exclusion of alpha particles from thoron in uranium detection
US4194115A (en) * 1978-11-07 1980-03-18 Nasa Method and means for helium/hydrogen ratio measurement by alpha scattering
FR2634561A1 (en) * 1988-07-25 1990-01-26 Nukem Gmbh METHOD AND DEVICE FOR CONTINUOUS MEASUREMENT OF ALPHA ACTIVITY CARRIED BY A GAS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9214170A1 *

Also Published As

Publication number Publication date
GB9316399D0 (en) 1993-10-27
AU1362592A (en) 1992-09-07
WO1992014170A1 (en) 1992-08-20
GB2267965A (en) 1993-12-22
CA2103574A1 (en) 1992-08-20

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