HOME > Latest News >Topics > May 2015

A strength test of new photosensors has been commenced.

写真The depth of the megaton Hyper-Kamiokande detector has reached 48 m; therefore, the photosensors to be incorporated into the detector must definitely be able to withstand a high water pressure.

The new photosensors being developed for the Hyper-Kamiokande project have been greatly improved in terms of not only photodetection but also strength under a high water pressure. A strength test of these new photosensors has been commenced.

写真A new photosensor made of 50-cm-diameter glass has been placed into a metal cylinder, and the metal cylinder has been placed into a blue tank for a test under a high water pressure.

Thus far, we have tested a few photosensors and confirmed that they can withstand a water depth of over 100 m, which is over two times the depth of the Hyper-Kamiokande detector.

写真We aim to improve the capacity of the photosensors to resist a high water pressure based on the test results.