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Report No.
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R&D on mercury target pitting issue

Kikuchi, Kenji; Kogawa, Hiroyuki  ; Futakawa, Masatoshi  ; Ishikura, Shuichi*; Kaminaga, Masanori  ; Hino, Ryutaro

In mercury spallation target development pitting is a technical issue, which is appeared on the target vessel in conjunction with the pressure wave. Pitting is found in the off-beam line test by Split Hopkinson Pressure Bar (SHPB) test and then found in the on-beam test of mercury target at WNR of LANSCE. In SHPB tests pressure in mercury was reduced from 80, 40, 20 and 10MPa. And type 316 stainless steel was inspected before and after the impacting test at x450 magnification. Results show that over 20MPa pitting was generated. But at the lowest pressure in mercury, the number of pitting was very limited and substantial damage was small. Substantial damage by pitting is characterized by holes because mass will be removed from the wall. Depression itself may not be a substantial damage as long as it is not accompanied with holes.

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Percentile:71.16

Category:Materials Science, Multidisciplinary

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