IPAC2013 - List of Authors (Yuan, H.)

Paper	Title	Page
WEPWO021	ADS 650MHz β=0.82 Supercongducting Cavity Research Status	2361
	Z.C. Liu, J. Gao, S. Jin, Y. Liu, J.Y. Zhai, T.X. Zhao, H.J. Zheng IHEP, Beijing, People's Republic of China J.X. Wang, H. Yu, H. Yuan BIAM, Beijing, People's Republic of China
	IHEP is developing a 650MHz β=0.82 supercongducting cavity for the China ADS project. The cavity is for the energy range of from 367MeV to 1500Mev. We have chosen a five cell cavity and optimized the cavity with Epk/Eacc and Bpk/Eacc to reach high gradient. Two cavity parts were fabricated and the EB welding is in process. This paper will show the fabrication status and measurement results.

WEPWO022	IHEP03 Fabrication and Testing Status	2364
	Z.C. Liu, J. Gao, S. Jin, Y. Liu, J.Y. Zhai, T.X. Zhao, H.J. Zheng IHEP, Beijing, People's Republic of China J.X. Wang, H. Yu, H. Yuan BIAM, Beijing, People's Republic of China
	IHEP is developing RF superconducting technology with different type of superconducting cavities. Tesla-like cavity which is designed by KEK is one of them. We have fabricated all the parts of the cavity using Nb material from Ningxia and cavity welding will be started soon. This paper will show the cavity fabrication procedures and measurement results.

WEPWO026	HOM Parameters Simulation and Measurement Result of the IHEP02 Low-loss Cavity	2372
	H.J. Zheng, J. Gao, S. Jin, Y. Liu, Z.C. Liu, Z.H. Mi, J.Y. Zhai, T.X. Zhao IHEP, Beijing, People's Republic of China H. Yuan BIAM, Beijing, People's Republic of China
	In cavities , there exists not only the fundamental mode which is used to accelerate the beam but also higher order modes(HOMs). The higher order modes excited by beam can seriously affect beam quality, especially for the higher R/Q mode. This paper reports on recent measurements of higher order modes in the IHEP-2 low-loss SRF cavity. Using different methods, the Qext of the dangerous modes passband are got. This result is compared with TESLA result. R/Q of the first three passbands are also got by CST and compared with the results of TESLA cavity and STFBaseline cavity.

Paper

Title

Page

ADS 650MHz β=0.82 Supercongducting Cavity Research Status

2361

Z.C. Liu, J. Gao, S. Jin, Y. Liu, J.Y. Zhai, T.X. Zhao, H.J. Zheng
IHEP, Beijing, People's Republic of China
J.X. Wang, H. Yu, H. Yuan
BIAM, Beijing, People's Republic of China

IHEP is developing a 650MHz β=0.82 supercongducting cavity for the China ADS project. The cavity is for the energy range of from 367MeV to 1500Mev. We have chosen a five cell cavity and optimized the cavity with Epk/Eacc and Bpk/Eacc to reach high gradient. Two cavity parts were fabricated and the EB welding is in process. This paper will show the fabrication status and measurement results.

WEPWO022

IHEP03 Fabrication and Testing Status

2364

Z.C. Liu, J. Gao, S. Jin, Y. Liu, J.Y. Zhai, T.X. Zhao, H.J. Zheng
IHEP, Beijing, People's Republic of China
J.X. Wang, H. Yu, H. Yuan
BIAM, Beijing, People's Republic of China

IHEP is developing RF superconducting technology with different type of superconducting cavities. Tesla-like cavity which is designed by KEK is one of them. We have fabricated all the parts of the cavity using Nb material from Ningxia and cavity welding will be started soon. This paper will show the cavity fabrication procedures and measurement results.

WEPWO026

HOM Parameters Simulation and Measurement Result of the IHEP02 Low-loss Cavity

2372

H.J. Zheng, J. Gao, S. Jin, Y. Liu, Z.C. Liu, Z.H. Mi, J.Y. Zhai, T.X. Zhao
IHEP, Beijing, People's Republic of China
H. Yuan
BIAM, Beijing, People's Republic of China

In cavities , there exists not only the fundamental mode which is used to accelerate the beam but also higher order modes(HOMs). The higher order modes excited by beam can seriously affect beam quality, especially for the higher R/Q mode. This paper reports on recent measurements of higher order modes in the IHEP-2 low-loss SRF cavity. Using different methods, the Qext of the dangerous modes passband are got. This result is compared with TESLA result. R/Q of the first three passbands are also got by CST and compared with the results of TESLA cavity and STFBaseline cavity.