Niobium based superconducting radio frequency(SCRF) cavities comprising niobium components joined by laser welding, method and apparatus for manufacturing such cavities

US9352416B2 · kind B2 · utility

Assignee

• THE SECRETARY, DEPARTMENT OF ATOMIC ENERGY, GOVT. OF INDIA · IN

Inventors

• Prashant Khare · Ashti, IN
• Brahma Nand Upadhyay · Indore, IN
• Sindhunil Barman Roy · Indore, IN
• Chandrakant Pithawa · Navi Mumbai, IN
• Vinod Chandra Sahni · Indore, IN
• Purushottam Das Gupta · Indore, IN
• Pradeep Kumar Kush · Indore, IN

Key dates

• Filing date: Nov 3, 2009
• Grant date: May 31, 2016
• Expiry date: Nov 1, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/08
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

Niobium or its alloy based Superconducting Radio Frequency (SCRF) Cavities involving atleast one laser beam welded components in the SCRF cavity welded from inside surface of the wall of cavity directed to achieving more than half the thickness to full depth penetration with minimum HAZ, minimizing distortion and shrinkage. The method ensures improved weld quality and surface finish substantially free of any weld defects. Also disclosed is the welding nozzle system and welding rigs adapted to facilitate such laser welding of the Niobium or its alloy based Superconducting Radio Frequency (SCRF) Cavities. The invention is thus directed to enhancing productivity, ensuring consistent quality and reliability, enhanced weld penetration with minimum HAZ, smooth finish of weld joints at possible reduced costs.