Japan will build the world’s largest neutrino detector: Super-K will detect unprecedented numbers of neutrinos produced by various sources — including cosmic rays, the Sun, supernovae and beams artificially produced by an existing particle accelerator.

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Questionable title, SuperK has existed for more than 20 years. Its successor Hyper-K is being planned now and is very exciting for neutrino research. As an addendum, IceCube, Auger, and ANITA are all other neutrino experiments that are currently running that are vastly larger than Hyper-K, depending on how you define the size of the experiment. One final thought: SuperK was built a few decades ago to look for something that has nothing to do with neutrinos (proton decay). They haven’t found it yet but have put the world’s best limits on it for most channels which has ruled out a lot of models and we learned a lot. Along the way they realized that neutrinos will interact in their detector. While neutrino interactions look somewhat different than proton decay, it is still very good to characterize and understand your backgrounds, especially since at some point they will be limited in proton decay sensitivity by the neutrino background (even though the neutrino signal does look a bit different). Kajita was tasked with this calculation and in 1998 presented unmistakable evidence that neutrinos oscillate which proves that they have mass. This has probably been one of the most surprising results in particle physics in decades.


Genuine question, why do we need this? What will this help with? What are the implications?


OP dropped the ball on this title. Super-K is already built and in operation long enough to dissolve a dropped wrench in the water. The article is talking about the next stage, Hyper-K.


When I first read the headline I thought it said Nintendo detector. I was so confused


“World’s largest” is a funy word to describe a neutrino detector 1/3846th the size of the already operational IceCube neutrino detector.