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Report No.

Feature in FY2011, utilization status and beam time proportion at TIARA facility

Mizuhashi, Kiyoshi; Takizawa, Haruki; Hosono, Masakazu; Nakamura, Yoshiteru*; Kaneya, Satoshi*; Mochizuki, Seigo*; Asai, Takahiro*; Kawabata, Michiko*; Daikubara, Kazuko*

Fiscal year 2011 was significantly influenced by the East Japan Great Earthquake (March 11, 2011). The operation of the TIARA facility which was being planned from April started from the middle of May. Lost beam-time of the experiment due to the great earthquake was compensated with operations on Saturday biweekly. And it was obliged to re-examine the operation plan during the period of electric power reduction in July, August, and September. The demanded reduction rate of electric power in daytime for summer season was 15% as compared with 2010. The limited value in daytime was 3,600 kW. Therefore, the experiment in daytime was conducted with light ions (H, D with $$<$$ 20 MeV) only by the AVF Cyclotron. As mentioned above, the electric power in the daytime of summer did not exceed 3,200 kW. Moreover, the beam time as an ordinary year was secured.



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