US 12,414,220 B2
High-frequency acceleration cavity core and high-frequency acceleration cavity in which same is used
Tadao Saito, Yokohama Kanagawa (JP); and Satoru Habu, Yokohama Kanagawa (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA MATERIALS CO., LTD., Yokohama (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA MATERIALS CO., LTD., Yokohama (JP)
Filed on Feb. 11, 2022, as Appl. No. 17/669,636.
Application 17/669,636 is a continuation of application No. PCT/JP2020/035608, filed on Sep. 18, 2020.
Claims priority of application No. 2019-187936 (JP), filed on Oct. 11, 2019.
Prior Publication US 2022/0210903 A1, Jun. 30, 2022
Int. Cl. H05H 7/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); H01F 1/153 (2006.01); H01F 41/02 (2006.01)
CPC H05H 7/04 (2013.01) [C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/12 (2013.01); C22C 38/16 (2013.01); H01F 1/15308 (2013.01); H01F 1/15333 (2013.01); H01F 1/15341 (2013.01); H01F 41/0226 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A core that is a toroidal core for an acceleration cavity applicable to a frequency of 100 kHz or more, obtained by winding an Fe-based magnetic ribbon having crystals with an average crystal grain size of 1 μm or less, wherein
a space factor of the Fe-based magnetic ribbon is 40% or more and 59% or less and the toroidal core has a portion having a gap portion of 10 μm or more from an inner diameter to an outer diameter, the gap portion being sandwiched between a first portion of an inner diameter side of the Fe-based magnetic ribbon and a second portion of an outer diameter side of the Fe-based magnetic ribbon which is adjacent to the first portion,
at least one of surfaces of the Fe-based magnetic ribbon includes an insulating layer having a thickness within a range of 5% or more and 25% or less of a thickness of the Fe-based magnetic ribbon, and
a space factor of the gap portion is 5% or more and 40% or less.