Magnetic alloy loading cavity

By employing a dual insulation method in the magnetic alloy loading cavity—using an internal vacuum chamber of the inner conductor assembly and an external cavity filled with SF6 gas—combined with a double-layer ceramic sheet and a forced cooling system, the problems of structural compactness and gap breakdown in traditional magnetic alloy loading cavities under high voltage are solved, achieving stable operation and improved withstand voltage under high gradients.

CN122054432APending Publication Date: 2026-05-15CHINA SPALLATION NEUTRON SOURCE SCI CENT +1
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Patent Information

Application Number
CN202610309117.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-13
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Traditional magnetic alloy loading cavities are difficult to maintain a compact structure and avoid gap breakdown under high voltage, and existing insulation methods are insufficient to meet the requirements for stable operation under high electric fields.

Method used

The system employs a dual composite insulation method, with an internal vacuum cavity and an external cavity filled with SF6 gas. Combined with coaxially arranged double-layer ceramic sheets and a forced cooling system, a sealed cavity is formed for uniform heat dissipation, and the creepage distance is increased by staggered conductor arrangement.

Benefits of technology

Maintaining a compact structure under extremely high gradient conditions effectively suppresses arcing, improves pressure resistance and operational reliability, and achieves a compact high gradient design.

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Abstract

The invention belongs to the technical field of particle accelerators, and discloses a magnetic alloy loading cavity which comprises a cavity shell, an inner conductor assembly and a blind flange, the interior of the inner conductor assembly is a vacuum cavity, and two first cavities and a second cavity communicated between the two first cavities are formed between the inner conductor assembly and the cavity shell; the first cavity and the second cavity are filled with insulating gas. The inner conductor assembly comprises a vacuum pipeline, a ceramic ring and conducting rings, the conducting rings are connected to the two ends of the ceramic ring, and the vacuum pipeline is connected to the two ends of the ceramic ring through the conducting rings; the magnetic alloy loading cavity further comprises a through-wall assembly and a conductor, the through-wall assembly is connected to the peripheral side of the cavity shell so as to seal the second cavity, and the conductor sequentially penetrates through the through-wall assembly and the second cavity in an insulating mode and then is connected with the conducting ring. According to the magnetic alloy loading cavity, the structure can be kept compact under the extremely high gradient condition, sparking can be effectively restrained, and the voltage endurance capacity and the operation reliability of the magnetic alloy loading cavity are greatly improved.
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