Technician with 20inch photomultiplier

Technician with 20inch photomultiplier

A034/0041 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 53.6MB

Downloadable file size: 1.8MB

Price image Pricing

Please login to use the price calculator


Caption: Proton decay. A technician holding a 20" (50cm) photomultiplier tube used in the search for proton decay. Hundreds of such tubes line a tank containing 9000 tonnes of water some 1000 metres underground in a zinc mine in Japan. Tokyo University's Kamiokande experiment was designed to look for decaying protons. If a proton decays, the charged particles it generates move through the water faster than light, and so generate blue 'Cerenkov' radiation. It is this that the photomultipliers detect. Computers then decide whether the event was a decay, or a collision with a solar neutrino.

Release details: Model release not available. Property release not required.

Keywords: cerenkov radiation, detector, detector tube, kamiokande, largest, particle physics research, photomultiplier tube, proton decay

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.