Design, analysis, and fabrication of the APT cavities

Atencio, S.; Campbell, B.; Chan, K.C.D.; Cimabue, A.; Clark, W.; Ellis, G.W.; Gentzlinger, R.C.; Haagenstad, H.; Hammon, D.; Haynes, W.B.; Kelley, J. P.; Krawczyk, Frank L.; Manzo, Michelle A.; Mart́ınez, F.; Martinez, H.; McClellen, J.; Mitchell, J.; Mitchell, R.; Montoya, David; Moss, J.; Fernández, Marcos D.; Rendon, Augusto; Rusnak, B.; Schrage, D.; Smith, Frank; Trujillo, M.A. González; Kuźmiński, J.

doi:10.1109/pac.1999.795416

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

DOI: 10.1109/pac.1999.795416

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Design, analysis, and fabrication of the APT cavities

S. Atencio

B. Campbell²,

K.C.D. Chan³

et al.

Abstract: The design for the superconducting cavities of the highenergy accelerator for the Accelerator Production of Tritium (APT) project has been extensively changed in the last two years. The original accelerator design incorporated 0.48 and 0.71 beta cavities with stiffeners, and a stainless-steel helium vessel. Today, the accelerator uses unstiffened 0.64 and 0.82 beta cavities, and a titanium helium vessel. This paper discusses the design process, including the supporting analyses, prototype cavities built, and t… Show more

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Cited by 4 publications

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Fabrication of a prototype medium-beta, 700 MHz APT superconducting RF cavity with industry

Kuźmiński

Chan²,

Gentzlinger³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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We have designed and fabricated a prototype β = 0.64, 700 MHz, 5-cell superconducting cavity in support of the Engineering Development and Demonstration (ED&D) effort for the Accelerator Production of Tritium (APT) project. The design incorporates all of the features of the production cavities. To develop future potential U.S. suppliers for the production cavities, a technology transfer program was initiated. In the first phase of the program the U.S. suppliers are using LANL supplied tooling, expertise, and niobium to fabricate the same prototype cavity. This paper addresses our experience in the fabrication of the ED&D cavity. It also describes interactions with various industries involved in the fabrication of other cavity components.

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Fabrication of a prototype medium-beta, 700 MHz APT superconducting RF cavity with industry

Kuźmiński

Chan²,

Gentzlinger³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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APT cryomodule assembly process and mockup model

Campbell

Chan²,

Newman³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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The cryomodule for the APT β=0.64 high energy accelerator incorporates either two or three RF cavities, two sets of magnetic shields, one active heat shield, multilayer insulation blankets, cryogenic plumbing for the shields and cavities, power couplers, cavity spokes and cavity frequency tuners. Maintaining cavity cleanliness is the most important aspect of the cryomodule assembly. The clean assembly of the cryomodule is done in a class 100 clean room. The final assembly, such as tungsten inert gas welding used to join the cryogenic plumbing, is done in a controlled environment. To address the assembly issues early in the design process, a full-scale mock-up of the entire cryomodule was fabricated. In this paper we will also describe the assembly process, and illustrate how the mock-up facilitated the procedures.

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Developments of 700-MHz 5-cell superconducting cavities for APT

Tajima

Chan²,

Gentzlinger³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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We have manufactured a total of six β=0.64, 700-MHz 5-cell cavities. The APT (Accelerator Production of Tritium) specification requires Q 0 > 5 x 10 9 at an accelerating field of 5 MV/m. So far, the results of vertical tests have shown maximum accelerating fields of 12 MV/m (peak surface field of 41 MV/m) and maximum low-field Q 0 of 3.6 x 10 10 at 2 K. The present limitations are available input power, field emission and quench. This type of cavities will also be used for an ADTF (Accelerator-Driven Test Facility) for AAA (Advanced Accelerator Applications) project.

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Design, analysis, and fabrication of the APT cavities

Cited by 4 publications

References 1 publication

Fabrication of a prototype medium-beta, 700 MHz APT superconducting RF cavity with industry

Fabrication of a prototype medium-beta, 700 MHz APT superconducting RF cavity with industry

APT cryomodule assembly process and mockup model

Developments of 700-MHz 5-cell superconducting cavities for APT

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