Nuclean Astrophysics and Aolar Neutrino Problem

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In the astrophysical S-factor discussion concerning fusion reactions such as ィイD13ィエD1He+ィイD13ィエD1He, ィイD13ィエD1He+d and d+ィイD13ィエD1He, the electron screening effects have caused much confusion. The best way to avoid such diffculties is to facilitate various atomic states for incident particles and targets. Several institutes have developed a technique using crossed ion beams to achieves sufficient luminosity.We consider two alternatives for the target, one is ECR plasma and the other is EBIT (electron beam ion trapping). Here we discuss the applicability of this technique as a target for d+d fusion reactions. We also consider this apparatus useful for measuring the energy loss data of charged particles inside the plasma at a ver low-incident energy. The prepared facility incorporates an ECR plasma powered by a 2.45 GHz RF source and a high current deuteron beam generator. Recently we successfully transported HィイD1+ィエD1ィイD22ィエD2ions of a few hundreds nA through the ECR plasma target to a Faraday cup.