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. 31, 2017
Filed:
Sep. 29, 2010
Steven Ahlen, Wellesley, MA (US);
Peter Fisher, Cambridge, MA (US);
Denis Dujmic, Arlington, MA (US);
Hermann F. Wellenstein, Waltham, MA (US);
Andrew Inglis, Brighton, MA (US);
Steven Ahlen, Wellesley, MA (US);
Peter Fisher, Cambridge, MA (US);
Denis Dujmic, Arlington, MA (US);
Hermann F. Wellenstein, Waltham, MA (US);
Andrew Inglis, Brighton, MA (US);
Trustees of Boston University, Boston, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Brandeis University, Waltham, MA (US);
Abstract
A neutron detector includes a pressure vessel, an electrically conductive field cage assembly within the pressure vessel and an imaging subsystem. A pressurized gas mixture of CF,He andHe at respective partial pressures is used. The field cage establishes a relatively large drift region of low field strength, in which ionization electrons generated by neutron-He interactions are directed toward a substantially smaller amplification region of substantially higher field strength in which the ionization electrons undergo avalanche multiplication resulting in scintillation of the CFalong scintillation tracks. The imaging system generates two-dimensional images of the scintillation patterns and employs track-finding to identify tracks and deduce the rate and direction of incident neutrons. One or more photo-multiplier tubes record the time-profile of the scintillation tracks permitting the determination of the third coordinate.