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Report No.

Beam monitor deformation by Tohoku Earthquake and its recovery project

Miura, Akihiko ; Hasegawa, Kazuo; Oguri, Hidetomo ; Ouchi, Nobuo ; Igarashi, Zenei*; Miyao, Tomoaki*; Ikegami, Masanori*

On March 11, 2011, the great earthquake occurred off the Pacific coast of Tohoku. This earthquake and related ones caused the big damage of the J-PARC accelerators. As for the beam monitors in J-PARC linac, some commissioning tools had damage and the vacuum leakage was observed. In the recovery work, we inspected the damage and put the emergency steps for the vacuum equipment. In this paper, detailed inspection results of beam monitors are described and also the recovery work is introduced.



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