Recovery of JAEA-Tokai Tandem Accelerator Facility

Abstract

A massive earthquake, named “The 2011 off the Pacific coast of Tohoku Earthquake”, hit us on March 11, 2011. The accelerator building quaked at an acceleration of 1000 gal on the top floor. The accelerator column withstood the earthquake with the help of quake-absorbers attached to its bottom, and no acceleration tubes were damaged. However, thirty eight column posts out of 240 had cracks, a vacuum leek happened at the terminal ion source, and the beam line of the superconducting booster lost its proper alignment. By recovering these damages as quickly as possible, we were able to open the tandem accelerator for experiment on September 15, 2011. We would express sincere thanks for kind support and encouragement received in this severe time.