WELDING METHOD AND SUPERCONDUCTING ACCELERATOR

摘要

Disclosed is a method for welding, with a laser beam, a cylindrical reinforcing member to the outer circumferential portion of a superconducting accelerator tube main body in a step of manufacturing a superconducting accelerator tube. The shape of the energy density distribution of the laser beam, said distribution being on the irradiation surface irradiated with the laser beam, has a Gaussian distribution shape having a peak portion, and the energy density of the peak portion is 5.8×105 W/cm2 or more.