Outline of the Detector

Water Purification System

The Super-Kamiokande detector is filled with 50,000 tons of ultra-pure water. It is very important to keep the water clean to improve the detection precision.



The Super-Kamiokande uses the clean groundwater. The further removal of small dusts, ions, bacteria and radon can reduce the scatter of Cherenkov light and background noise from radon decay products in the water. The water in the tank is continuously reprocessed in the cycle system. The typical number of particles of size greater than 0.1 micrometer in the water is reduced to 100 particles/cc after purification.

Details of the Water Purification System




Outline of the Detector