SRF2013 - List of Authors (Zhu, F.)

Paper

Title

Page

Commissioning and Operation of DC-SRF Injector

53

K.X. Liu, J.E. Chen, L.W. Feng, J.K. Hao, S. Huang, L. Lin, S.W. Quan, F. Wang, Zh.W. Wang, X.D. Wen, H.M. Xie, K. Zhao, F. Zhu
PKU, Beijing, People's Republic of China

As a new and compact injector with medium beam current, the DC-SRF injector at Peking University has been upgraded recently mainly on DC part and heat loading. With a new 20kW solid state RF power source, an improved LLRF system and related diagnostic devices on the new beam line, a series of experiments have been carried out for stably operating the DC-SRF injector at 2K temperature. The description of the system, experiment process and results will be presented.

Slides MOIOB04 [4.992 MB]

THP011

Improving Gradient of 9-cell SRF Cavities at Peking University

914

J.K. Hao, J.E. Chen, L. Lin, K.X. Liu, X.Y. Lu, S.W. Quan, F. Wang, H.M. Xie, B.C. Zhang, K. Zhao, F. Zhu
PKU, Beijing, People's Republic of China

Four 9-cell TESLA superconducting cavities have been fabricated with Ningxia OTIC niobium material, including two fine grain and two large grain niobium cavities. The cavities have been tested after post treatments. At the early stage (PKU1 and PKU2), the gradient was about 23 MV/m. The gradient of PKU3 reached 28.4 MV/m, but the Q is low. The newest large grain 1.3 GHz 9-cell TESLA type SRF cavity (PKU4) has been made with careful control of machining, and improved surface treatment and electron beam welding. The maximum of gradient is 32.4 MV/m and the intrinsic quality factor (Q0) is 1.3x10¹⁰, which meet the requirement for ILC both in accelerating gradient and intrinsic quality factor.

Paper	Title	Page
MOIOB04	Commissioning and Operation of DC-SRF Injector	53
	K.X. Liu, J.E. Chen, L.W. Feng, J.K. Hao, S. Huang, L. Lin, S.W. Quan, F. Wang, Zh.W. Wang, X.D. Wen, H.M. Xie, K. Zhao, F. Zhu PKU, Beijing, People's Republic of China
	As a new and compact injector with medium beam current, the DC-SRF injector at Peking University has been upgraded recently mainly on DC part and heat loading. With a new 20kW solid state RF power source, an improved LLRF system and related diagnostic devices on the new beam line, a series of experiments have been carried out for stably operating the DC-SRF injector at 2K temperature. The description of the system, experiment process and results will be presented.
	Slides MOIOB04 [4.992 MB]

THP011	Improving Gradient of 9-cell SRF Cavities at Peking University	914
	J.K. Hao, J.E. Chen, L. Lin, K.X. Liu, X.Y. Lu, S.W. Quan, F. Wang, H.M. Xie, B.C. Zhang, K. Zhao, F. Zhu PKU, Beijing, People's Republic of China
	Four 9-cell TESLA superconducting cavities have been fabricated with Ningxia OTIC niobium material, including two fine grain and two large grain niobium cavities. The cavities have been tested after post treatments. At the early stage (PKU1 and PKU2), the gradient was about 23 MV/m. The gradient of PKU3 reached 28.4 MV/m, but the Q is low. The newest large grain 1.3 GHz 9-cell TESLA type SRF cavity (PKU4) has been made with careful control of machining, and improved surface treatment and electron beam welding. The maximum of gradient is 32.4 MV/m and the intrinsic quality factor (Q0) is 1.3x10¹⁰, which meet the requirement for ILC both in accelerating gradient and intrinsic quality factor.