The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2002
Filed:
Apr. 19, 2000
Tom Francke, Sollentuna, SE;
DigRay AB, Danderyd, SE;
Abstract
Spectrally resolved detection of ionizing radiation in a detector comprising a chamber ( ) filled with an ionizable substance, a radiation entrance ( ), an electron avalanche amplification means, and a read-out arrangement ( ), comprises introducing a broadband radiation beam ( ) into the chamber between and in parallel first and second electrode arrangements for ionization of the ionizable substance and avalanche amplifying said electrons. By means of the read-out arrangement ( ) electron avalanches (S , S , . . . S ), derivable mainly from ionization in sections (X , H , . . . , X ) of the chamber that are separated in the direction of the introduced radiation beam, are separately detected. From spectrally resolved absorption data, weighting factors (W , W , . . . , W , W , W , . . . , W , . . . , W , W , . . . , W ) for different spectral components (E , E , . . . , E ) of the radiation ( ) and for different sections (X , X , . . . , X ) of the chamber are deduced, each of said weighting factors being substantially proportional to the photon flux (&phgr; , &phgr; , . . . , &phgr; , &phgr; , &phgr; , . . . , &phgr; , . . . , &phgr; , &phgr; , . . . , &phgr; ) of the respective spectral component (E , E , . . . , E ) in the respective section (X , X , . . . , X ). Finally, by means of said detected electron avalanches (S , S , . . . , S ) and said weighting factors, the respective detected electron avalanches (S , S , . . . , S ) that are derivable from ionization by the respective spectral component of said broadband radiation are deduced.