SRF2011 - List of Authors (Liu, Z.C.)

Paper

Title

Page

IHEP 1.3GHz SRF Technology R&D Status

87

J. Gao, Y.L. Chi, J.P. Dai, H.S. Guo, T.M. Huang, H.Y. Lin, C. H. Li, D.Z. Li, S.P. Li, Z.Q. Li, Z.C. Liu, Q. Ma, W.M. Pan, F. Qiu, Y. Sun, G.W. Wang, Q.Y. Wang, J.Y. Zhai, T.X. Zhao
IHEP Beijing, Beijing, People's Republic of China
R. Ge
IHEP Beijng, Beijing, People's Republic of China

1.3 GHz superconducting radio-frequency (SRF) technology is one of the key technologies for the ILC and future XFEL and ERL projects in China. With the aim to develop 1.3 GHz SRF technology, IHEP has started a program to build an SRF Accelerating Unit. This unit contains a 9-cell 1.3 GHz superconducting cavity, a short cryomodule, a high power input coupler, a tuner, a low level RF system etc. This program also includes the SRF laboratory upgrade, which will permit the unit to be built and tested at IHEP. The unit will be used for the 1.3 GHz SRF system integration study, high power horizontal test and possible beam test in the future. In this paper, we report the recent R&D status of this program. The first large grain low-loss shape 9-cell superconducting RF cavity made by IHEP reached 20 MV/m in the first vertical test. The prototype tuner and LLRF system are under test. The first 1.3 GHz high power input coupler fabrication was finished and the cryomodule is under fabrication. Several key SRF facilities (CBP, CP, HPR, optical inspection camera, pretuning machine etc) for 9-cell cavity surface treatment and pre-tuning were successfully commissioned and in operation.

WEIOB06

IHEP 1.3GHz Low-Loss Large Grain 9-cell cavity R&D for ILC

611

J.Y. Zhai, J.P. Dai, J. Gao, D.Z. Li, Z.Q. Li, Z.C. Liu, Q.Y. Wang, Q. Xiao, T.X. Zhao
IHEP Beijing, Beijing, People's Republic of China

The combination of the low-loss shape and large grain niobium material is expected to be the possible way to achieve higher gradient and lower cost for ILC 9-cell cavities, and will be essencial for the ILC 1 TeV upgrade. As the key component of the “IHEP 1.3 GHz SRF Accelerating Unit Project”, a low-loss shape 9-cell cavity using Ningxia large grain niobium (IHEP-01) was fabricated and surface treated (CBP, CP, annealing, pre-tuning) at IHEP. The cavity reached 20 MV/m in the first vertical test at KEK STF on July 2010. The quench locations were found by T-mapping and optical inspection. Equator defects were removed by further CBP treatment. Second vertical test on this cavity was done at JLAB recently after 2nd processing at IHEP. This paper reports the latest result of the vertical test and surface diagnostics.

Slides WEIOB06 [4.906 MB]

Paper	Title	Page
MOPO015	IHEP 1.3GHz SRF Technology R&D Status	87
	J. Gao, Y.L. Chi, J.P. Dai, H.S. Guo, T.M. Huang, H.Y. Lin, C. H. Li, D.Z. Li, S.P. Li, Z.Q. Li, Z.C. Liu, Q. Ma, W.M. Pan, F. Qiu, Y. Sun, G.W. Wang, Q.Y. Wang, J.Y. Zhai, T.X. Zhao IHEP Beijing, Beijing, People's Republic of China R. Ge IHEP Beijng, Beijing, People's Republic of China
	1.3 GHz superconducting radio-frequency (SRF) technology is one of the key technologies for the ILC and future XFEL and ERL projects in China. With the aim to develop 1.3 GHz SRF technology, IHEP has started a program to build an SRF Accelerating Unit. This unit contains a 9-cell 1.3 GHz superconducting cavity, a short cryomodule, a high power input coupler, a tuner, a low level RF system etc. This program also includes the SRF laboratory upgrade, which will permit the unit to be built and tested at IHEP. The unit will be used for the 1.3 GHz SRF system integration study, high power horizontal test and possible beam test in the future. In this paper, we report the recent R&D status of this program. The first large grain low-loss shape 9-cell superconducting RF cavity made by IHEP reached 20 MV/m in the first vertical test. The prototype tuner and LLRF system are under test. The first 1.3 GHz high power input coupler fabrication was finished and the cryomodule is under fabrication. Several key SRF facilities (CBP, CP, HPR, optical inspection camera, pretuning machine etc) for 9-cell cavity surface treatment and pre-tuning were successfully commissioned and in operation.

WEIOB06	IHEP 1.3GHz Low-Loss Large Grain 9-cell cavity R&D for ILC	611
	J.Y. Zhai, J.P. Dai, J. Gao, D.Z. Li, Z.Q. Li, Z.C. Liu, Q.Y. Wang, Q. Xiao, T.X. Zhao IHEP Beijing, Beijing, People's Republic of China
	The combination of the low-loss shape and large grain niobium material is expected to be the possible way to achieve higher gradient and lower cost for ILC 9-cell cavities, and will be essencial for the ILC 1 TeV upgrade. As the key component of the “IHEP 1.3 GHz SRF Accelerating Unit Project”, a low-loss shape 9-cell cavity using Ningxia large grain niobium (IHEP-01) was fabricated and surface treated (CBP, CP, annealing, pre-tuning) at IHEP. The cavity reached 20 MV/m in the first vertical test at KEK STF on July 2010. The quench locations were found by T-mapping and optical inspection. Equator defects were removed by further CBP treatment. Second vertical test on this cavity was done at JLAB recently after 2nd processing at IHEP. This paper reports the latest result of the vertical test and surface diagnostics.
	Slides WEIOB06 [4.906 MB]