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Zong, Z. G.

Paper Title Page
WEPMN047 Electro-polished Cavities Using China Ningxia Large Grain Niobium Material 2143
  • Z. G. Zong, J. Gao, M. Q. Ge, Q. J. Xu, J. Y. Zhai
    IHEP Beijing, Beijing
  • F. Furuta, H. Inoue, T. Saeki, K. Saito
    KEK, Ibaraki
  For the International Linear Collider (ILC), superconducting RF cavity technology was chosen. The superconducting cavity is made of polycrystalline niobium material so far. However, the material cost is high and the cavity performance has a rather scatter now. Large grain niobium (LG) cavity is an excellent idea because it simplifies the production process and results in less expensive. JLAB and DESY are pushing the R&D in last two years. KEK also has started to investigate LG. Three cavities with Ichiro shape were made of Chinese large grain niobium (Ningxia). A series of vertical tests has been carried out on several different surfaces treatment procedures by electropolishing. One cavity has reached the high gradient of more than 43 MV/m repeatedly. Other two cavities are still under testing. In this paper, the features of LG on electropolishing will be described with Ningxia large grain niobium material.