| Paper | Title | Page |
|---|
| WEP34 | Research and development of 1.3 GHz low loss cavities made of China large grain at IHEP | 549 |
| | - Z. G. Zong, J. Gao, H. Sun, F. C. Zhao, M. Q. Ge, J. Gu, Q. J. Xu, J. Z. Zhai
IHEP, CAS - L. Zhang, L. Q. Liu
TIPC, CAS
| |
| | Institute of High Energy Physics, IHEP, has studied
superconducting RF cavities since Oct. 2000. To
contribute to International Linear Collider (ILC) for
which superconducting RF cavity was chosen, research
and development of 1.3 GHz low loss cavities using
China large grain niobium was carried out recently at
IHEP. The study is based on the latest research direction
in the material and the shape of the cavity and involves
the design of low loss shape for higher gradient and
fabrication using large grain niobium material. The shape
and some parameters of the cavity will be presented in
this paper and be compared with alternative structure (low
loss cavity) design data. In the manufacture the cavity
was formed by standard procedures, such as deep drawing,
trimming and welding by electron beam. To prepare the
RF surface for vertically cryogenic test, centrifugal barrel
polishing, barrel chemical polishing, annealing, high
pressure rinsing and baking were employed. This paper
introduces the features of the fabrication and surface
treatments on the large grain cavity and presents the
preliminary results of the research. | |