High-frequency acceleration cavity core and high-frequency acceleration cavity in which same is used
AssigneesKabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
InventorsTadao Saito, Satoru Habu
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Abstract
A high-frequency acceleration cavity core is a toroidal core obtained by winding an Fe-based magnetic ribbon having crystals with an average crystal grain size of 1 μm or less, in which a space factor of the Fe-based magnetic ribbon is 40% or more and 59% or less, and a μQf value at 1 MHz is 3×109 Hz or more. The average crystal grain size is preferably 0.1 μm or less. The toroidal core preferably has a portion having a gap portion from an inner diameter to an outer diameter.
Claims14
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.
Dependencies are inferred from the claim text.