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Report No.
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Present status of activities in the IFMIF/EVEDA lithium test loop, 2; Measurement tests for the lithium target

Kanemura, Takuji; Kondo, Hiroo; Furukawa, Tomohiro  ; Hirakawa, Yasushi ; Ida, Mizuho; Yamaoka, Nobuo*; Suzuki, Sachiko*; Hoashi, Eiji*; Horiike, Hiroshi*; Wakai, Eiichi  

In the Engineering Validation and Engineering Design Activities (EVEDA) of the International Fusion Materials Irradiation Facility (IFMIF), it is required that a device to measure thickness variation of the lithium (Li) target with precision of 0.1 mm shall be delivered. As a favorable device to meet such a precision, we experimentally evaluated applicability of a laser-based distance meter to measurement of Li target thickness in the EVEDA Li Test Loop. To evaluate the applicability of the device, the measurement precision of the Li thickness was evaluated in the velocities of 10 and 15 m/s. As a result, the precision was 0.03mm. Thus, we concluded that a laser-based distance meter is applicable to measurement of the Li target thickness. The average target thickness varies in the both streamwise and spanwise direction due to the surface wakes initiated at the nozzle edge.

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