- 2004 : K2K stopped taking data for good. But some students are still working hard to analyze valuable data.
- June 19, 1999: Finally, the first K2K neutrino beam event is observed
in the Super-Kamiokande detector. See the
official press release announcement
for more detail.
And see an event display of
this first event. Also visit our
K2K home page at KEK, and other
- June 12, 1999: The K2K experiment is taking data.
The number of protons on target per pulse is about 4x10^12
and the neutrino horn current is 200 kA. We are anxiously waiting for
the first K2K neutrino beam event in the Super-Kamiokande detector.
- March 5, 1999: The K2K experiment starts its neutrino physics
run for the first time. The neutrinos are generated by the
12 GeV proton beam hitting an aluminium target inside a
neutrino horn. The neutrino are then sent to the K2K near detector
inside the KEK laboratoty, 300 m away from the target, and to the far
detector (Super-Kamiokande detector) at Kamioka, 250 km away from
the KEK laboratory.
- January 27, 1999: The brand-new neutrino beam line at KEK for the
K2K long baseline neutrino oscillation experiment starts its