STATUS REPORT ON SURVEY AND ALIGNMENT OF J-PARC AFTER THE EARTHQUAKE
1. JAEA/J-PARC,Tokai,Japan2. KEK/J-PARC,Tukuba,Japan
摘要：The accelerator and experimental facilities located in the J-PARC were displaced by the large earthquake on March 11,2011 in eastern Japan.At J-PARC a surveying network was prepared on the ground to cover the whole facility and GPS survey and leveling of the ground reference points were carried out in order to support recovery works.Also in the accelerator tunnel the device on the beam line was surveyed by using precise digital levels and laser trackers,and its alignment was carried out.J-PARC resumed its beam operation after the earthquake in December 2011.In this paper,we report the survey result in the accelerator tunnel after the earthquake and realignment of the J-PARC.