Study on SRF Multicell Accelerating Cavity for Linear Collider and Trapped Modes

Zu Donglin; Chen jiaer

Chinese Physics C> 1997, Vol. 21> Issue(2) : 180-186

Study on SRF Multicell Accelerating Cavity for Linear Collider and Trapped Modes

Zu Donglin ^, ,
Chen jiaer

Institute of Heavy Ion Physics,Beijing University,Beijing 100871

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Abstract：
This paper designed a 9—cell RF superconducting accelerating cavity for the TeV electron linear accelerator collider in next century.The ratio,E_pk/E_acc,of the maximal surface electric field to the accelerating gradient has been reduced to 2.024 and the cell to cell coupling keeps high to 1.95%.Distribution of the HOM passbands is reasonable.There is no overlap between the bands,therefore no trapped modes.The CSE type structure guarantees the mechanical hardness.According to present state of the art technigue of Niobium surface processing,it is possible to reach 25—30MV/m for the accelerating gradient with beam load.

References

[1]	H. Padamsee, J. of Superconductizity , 1 (1988)377.[2] A. Mosnier, the trapped Modes in a multicell SC Cavity, the 1st TESLA Workshop, 23 - 26 July 1990,Cornell Vniversity , Ithaca, New York.[3] 俎栋林, 高能物理与核物理, 20(1996)1041.[4] T. Weiland, NIM, 216 (1983) 329.

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Zu Donglin and Chen jiaer. Study on SRF Multicell Accelerating Cavity for Linear Collider and Trapped Modes[J]. Chinese Physics C, 1997, 21(2): 180-186.

Zu Donglin and Chen jiaer. Study on SRF Multicell Accelerating Cavity for Linear Collider and Trapped Modes[J]. Chinese Physics C, 1997, 21(2): 180-186. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Study on SRF Multicell Accelerating Cavity for Linear Collider and Trapped Modes

Zu Donglin ^,
Chen jiaer

Corresponding author: Zu Donglin,

Institute of Heavy Ion Physics,Beijing University,Beijing 100871

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-02-05

Abstract: This paper designed a 9—cell RF superconducting accelerating cavity for the TeV electron linear accelerator collider in next century.The ratio,E_pk/E_acc,of the maximal surface electric field to the accelerating gradient has been reduced to 2.024 and the cell to cell coupling keeps high to 1.95%.Distribution of the HOM passbands is reasonable.There is no overlap between the bands,therefore no trapped modes.The CSE type structure guarantees the mechanical hardness.According to present state of the art technigue of Niobium surface processing,it is possible to reach 25—30MV/m for the accelerating gradient with beam load.