EBW technology applied on the ICRF antenna component

Central conductor is one of the key components of ICRF antenna, it is usually formed by welding due to the complex structure. High level of welding seam quality and small deformation are very important to central conductor. Electron beam welding (EBW) have been chosen to be used. In order to meet EBW requirements and reduce the risk, Complex and high level of the accuracy welding fixture have been designed for central conductor EBW. Some samples were manufactured to do test and examination for EBW welding qualification before central conductor welding. Based on the welding parameters, thermal analysis using FEM for the welding seam have been carried out. One mock up of central conductor have been manufactured to do EB welding for proving welding parameters, In addition to some post welding process were employed after one central conductor EB welding, Results of examination and inspection of one central conductor using EBW are presented in this paper.