Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities

Zu Donglin

Chinese Physics C> 1997, Vol. 21> Issue(S1) : 491-503

Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities

Zu Donglin

Institute of Heavy Ion Physics, Peking University, Beijing, China

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This paper reports on a new design of single-cell superconducting cavities. It consists of two half-end cells of the 9-cell Beijing TESLA shape accelerating cavity. The ratio of the maximal surface electric field to accelerating gradient, E_p/E_acc, of the π mode of the 9-cell cavity was reduced to 2.024. The cell-to-cell coupling k is as high as 1.95%. The E_p/E_acc in the single-cell cavities was reduced to 1.8. The monopole, dipole, and quadrupole high-order modes (HOMs) were calculated using URMEL-T with the resistance-band model. In addition, the concept of the structure parameters of the niobium cavity introduced the condition of calculation reliability with the codes; the calculation reliabilities of URMEL and URMEL-T were also discussed.
- superconducting RF ,
- superconducting cavity ,
- niobium cavity ,
- accelerating mode ,
- HOM

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Zu Donglin. Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities[J]. Chinese Physics C, 1997, 21(S1): 491-503.

Zu Donglin. Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities[J]. Chinese Physics C, 1997, 21(S1): 491-503. shu

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Received: 1995-02-02

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Supported by the National Natural Science Foundation of China.

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沈阳化工大学材料科学与工程学院沈阳 110142

Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities

Institute of Heavy Ion Physics, Peking University, Beijing, China

Received Date: 1995-02-02

Fund Project: Supported by the National Natural Science Foundation of China.

Abstract: This paper reports on a new design of single-cell superconducting cavities. It consists of two half-end cells of the 9-cell Beijing TESLA shape accelerating cavity. The ratio of the maximal surface electric field to accelerating gradient, E_p/E_acc, of the π mode of the 9-cell cavity was reduced to 2.024. The cell-to-cell coupling k is as high as 1.95%. The E_p/E_acc in the single-cell cavities was reduced to 1.8. The monopole, dipole, and quadrupole high-order modes (HOMs) were calculated using URMEL-T with the resistance-band model. In addition, the concept of the structure parameters of the niobium cavity introduced the condition of calculation reliability with the codes; the calculation reliabilities of URMEL and URMEL-T were also discussed.

Concept Design of a New Structure of 1.3GHz Single-Cell Superconducting Cavities

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