US 6,713,976 B1Granted

Beam accelerator

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsNobuyuki Zumoto, Takahisa Nagayama, Yuko Kijima, Yoshihiro Ishi

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Abstract

A high performance beam accelerator in which accelerating voltage may be increased by applying a high excitation frequency to the accelerator core and controlling heat generation. The beam accelerator includes an annular hollow vessel with an annular passage, fixed magnetic field generators generating magnetic fields for deflecting and guiding a charged particle beam into an orbit, an accelerating gap for inducing an accelerating electric field, and an accelerator core for generating the accelerating electric field via the accelerating gap by changing magnetic state in accordance with electromagnetic induction. Injection to ejection of charged particles is completed within one cycle of the excitation frequency applied to the accelerator core. The accelerator core includes wound multiple layers of a ribbon-shaped soft magnetic alloy, 50 μm or less in thickness, and having a saturation magnetic flux density of 1 Tesla or more.

Claims8

Dependent claims

A beam accelerator comprising:

an annular hollow vessel having an annular passage inside, through which a charged particle beam passes,
a plurality of fixed magnetic field generating means for deflecting the charged particle beam and guiding the charged particle beam into an orbit in said annular passage, located along a circumferential direction of said annular hollow vessel,
an accelerating gap for inducing an accelerating electric field in the charged particle beam, located at a position of said annular hollow vessel, and
an accelerator core, surrounding said annular hollow vessel, for generating the accelerating electric field via said accelerating gap by changing magnetic state of an inner portion of said annular passage in accordance with electromagnetic induction, wherein
injection to ejection of charged particles is completed within one cycle of an excitation frequency applied to said accelerator core, and
said accelerator core includes multiple wound layers of a ribbon-shaped soft magnetic alloy, 50 μm or less in thickness, and having a saturation magnetic flux density of at least one Tesla.

3 more elements

Dependencies are inferred from the claim text.