Hiroyuki Kyushima, an engineer at Hamamatsu Photonics K.K. who helped create a particle detector that enabled physicist Masatoshi Koshiba to win the Nobel Prize in physics in 2002, has developed an ultra-small photomultiplier tube together with his fellow workers.

“This is a break-proof, ideal PMT with functions comparable to those of the Super-Kamiokande,” Kyushima, 56, said.

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