Apparatus and a method of detecting hydrogen in an object by...

Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet

Reexamination Certificate

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C250S221000

Reexamination Certificate

active

10539709

ABSTRACT:
This invention relates to an apparatus for the detection of the hydrogen content of an object, wherein said apparatus comprises a neutron source that emits fast/energy-rich neutrons; a detector device for detecting thermal neutrons; a moderator that brakes and reflects neutrons upon collision; wherein said detector device comprises a light-emitting unit that emits light in case of a nuclear event/reaction with a thermal neutron; a light-registering unit that emits an electric pulse/an electric signal when a flash of light is detected; and wherein said moderator is a light-conductive unit arranged between said light-emitting unit and said light-registering unit. Moreover the invention relates to a corresponding method of detecting hydrogen. Hereby an apparatus and a method are provided for the detection of humidity/water/hydrogen with improved sensitivity which entails that the used neutron source need not be as powerful and that smaller amounts of hydrogen can be detected compared to previously suggested solutions. Moreover, a reliable non-modifying
on-destructive detection is provided.

REFERENCES:
patent: 3707631 (1972-12-01), Untermyer
patent: 4499380 (1985-02-01), Aggour et al.
patent: 5446288 (1995-08-01), Tumer
patent: 984 566 (1961-09-01), None
patent: 1 058 775 (1963-11-01), None
patent: 1 180 450 (1967-03-01), None
patent: WO 02/31536 (2002-04-01), None
Patent Abs. of Japan vol. 1999, No. 05, May 31, 1999 & JP 11 051799 A—Chisaka Haruo).
Patent Abs. of Japan vol. 009, No. 006 Jan. 11, 1985 & JP 59 154347—Soiru Ando Rotsuku Engineering KK.

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