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:
Jun. 13, 2017
Filed:
Sep. 05, 2014
Mitsubishi Heavy Industries Mechatronics Systems, Ltd., Kobe-shi, Hyogo, JP;
Osaka University, Suita-shi, Osaka, JP;
Shuhei Kuri, Kobe, JP;
Toshiharu Takahashi, Kobe, JP;
Hiroshi Horiike, Suita, JP;
Eiji Hoashi, Suita, JP;
Isao Murata, Suita, JP;
Sachiko Doi, Suita, JP;
Itsuro Kato, Suita, JP;
MITSUBISHI HEAVY INDUSTRIES MECHATRONICS SYSTEMS, LTD., Hyogo, JP;
OSAKA UNIVERSITY, Osaka, JP;
Abstract
The neutron irradiation apparatus includes an introduction tube for introducing a proton beam, a target structure provided in a lower end of the introduction tube, an aluminum fluoride layer disposed below the target structure in an irradiation path of neutrons generated in the target structure, and a heavy water layer placed under the aluminum fluoride layer in layers. The aluminum fluoride layer is set at a thickness that increases epithermal neutrons. Since use of only the aluminum fluoride layer increases its thickness too much, heavy water is placed. Heavy water moderates neutrons quickly, and allows increasing epithermal neutrons without increasing the thickness. The combination of the aluminum fluoride layer and the heavy water layer allows increasing epithermal neutrons by attenuating only fast neutrons without increasing thermal neutrons. Accordingly, neutron flux with many epithermal neutrons is obtained.