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:
Nov. 16, 2021
Filed:
Apr. 20, 2017
Applicant:
Kaneka Corporation, Osaka, JP;
Inventors:
Assignee:
KANEKA CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/22 (2006.01); H01J 37/32 (2006.01); G02B 5/20 (2006.01); H01J 37/34 (2006.01); G21K 1/10 (2006.01); G21K 1/02 (2006.01);
U.S. Cl.
CPC ...
H01J 37/3233 (2013.01); G02B 5/20 (2013.01); G21K 1/02 (2013.01); G21K 1/10 (2013.01); H01J 37/3488 (2013.01);
Abstract
A beam intensity converting film that has sufficient shielding property, sufficient durability, and sufficient heat resistance and that can reduce the extent of radioactivation. An attenuator is constituted by a graphite film placed such that a surface thereof intersects the beam axis of a charged particle beam, the graphite film has a thickness of 1 μm or greater, and the thermal conductivity in a surface direction of the graphite film is equal to or greater than 20 times the thermal conductivity in the thickness direction of the graphite film.