Search for Matter/Antimatter in Early Universe

超导谱仪（BESS）在以往实验的基础上进行了升级，特别是在< 1 GeV能量范围内的粒子识别方面。1995年JFY使用BESS光谱仪的气球飞行是在1995年6月至8月期间在加拿大北部进行的。在这项赠款的支持下，派出了10名参加者。1995年7月25日至26日，科学气球飞行观测到约40个低能宇宙射线反质子，而今年的bbb40反质子观测也很好地验证了前几年的第一次宇宙射线反质子观测。宇宙射线中的反粒子搜索已经取得了进展，其反氦/氦比的灵敏度已降至2*10^<-6>。这些结果发表在《物理评论快报》上，并在1995年的国际宇宙射线会议上提出，在这个领域得到了很高的评价。

Based on the experimence integrated in previous years, the superconducting spectrometer, BESS,has been up-graded specially in particle identification in an energy range of < 1 GeV.The balloon flight using the BESS spectrometer, in JFY 1995, was carried out in north Canada for a duration between June-August, 1995. Ten participants were deligated with support of this grant. As a scientific result, about forty low energy cosmic-ray antiprotons was observed in the scientific balloon flight on July 25-26,1995, and the first cosmic-ray antiproton observation in the previous years have been well verified with > 40 antiproton obserbation, this year. Antiparticle search in cosmic-ray has been progressed with a sensitivity down to 2*10^<-6> in antihelium/helium ratio.These results have been published in Physical Review Letters and was presented in the Internaional cosmic-Ray Conference, in 1995, in very high evaluation in this field.