Japanese version is here .
A new type of solar neutron telescope, with an effective area of 4 square m, has been in operation since June 21,1992 at Mt. Norokura. This is the second neutron telescope at Mt. Norikura. The first one, with an effective area of 1 square m, was in operation during the spectacular series of solar flares in June 1991 and detected high energy neutrons from at least one of these flares. Research fields of Heliospheric Environment . STELab Overview .