We are preparing a series of balloon-borne experiments to search for anti-protons and anti-matter of cosmic origin. The thin model solenoid for the ASTROMAG project will be equipped with a cylindrical jet chamber resulting to a large solid angle of 1m^2 sr. Anti-helium will then be searched for to a flux level of 10^<-8> relative to the helium. Simultaneously, we can perform a very sensitive search for GeV γ-rays from point-sources. The energy spectra of the positrons and of various isotopes can be measured over a wide energy range. The detectors are now under construction. A prototype detector was launched from Sanriku in June 1988 and the total system worked as expected.
大型超伝導スペクトロメータによる宇宙線観測計画
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