THE OBSERVATION OF PRIMARY COSMIC-RAY BY JAPAN-RUSSIA COORPORATIVE BALLOON EXPERIMENT

本实验是为了弄清宇宙线能谱中所谓的“膝”，即谱倾斜度的快速变化而进行的。长时间气球飞行从1996年到1999年，从堪察加半岛到伏尔加河共进行了11次（约150小时）的宇宙线观测，成功地进行了10次宇宙线观测。通过使用这种补助金和其他。本研究取得的主要成果如下：1.实验得到的能谱与从低能谱外推得到的能谱吻合较好.质子能谱的计算结果与JACEE（日本和美国合作实验）和索科尔（俄罗斯实验）的结果一致，氦能谱的通量与实验结果相差2倍 ...更多信息 从以上两个实验中得出结论. 1999年在美国犹他州召开的国际宇宙线会议和2001年在德国汉堡召开的国际宇宙线会议上，都报道了这些结果。到2001年为止，大多数的空气簇射实验得到的通量值都比我们的数据高，然而，许多空气簇射小组在2001年会议上报告的通量结果与我们的结果相似。另外，在我们能区直接观测的结果只是我们的报告，我们的结果得到了特别报告员的高度评价，关于1996年数据结果的论文发表在第22届ISTS会议录（Vol.2 p1831-1836）和阿斯特粒子物理（No.16 2001，p13-46）上。对1999年的试验数据进行了分析。由于1999年的实验相当于四次飞行，要得到最终结果还需要一、两年的时间。少

This experiment has been carried out for the purpose of making clear so called "knee" in the cosmic-ray energy spectrum which is a rapid change in an inclination of spectrum. Long duration balloon flights (about 150 hours) from Kamchatka to Volga River were carried out 11 times from 1996 to 1999, and 10 flights were succeeded in the observation of cosmic-ray.Both side of Japanese and Russian researchers visited each other countries to have a check and discussion about analyzed data, discussion about energy determination and calculation of detection efficiency, by use of this Grant-in-Aid and others. The main results obtained by this research is as follows.1. Energy spectrum obtained by our experiment has a good agreement with the extrapolation from the lower energy spectrum.2. Our result in proton spectrum is consistent to the result by JACEE (Japan and USA co-operative experiment) and SOKOL (Russian experiment), and flux in helium spectrum has a twice difference compared to the result … More form above two experiments.3. Flux and slope inclination of spectrum for heavy particle has also rather large differences compared to above experiments.These results were reported in 1999 international cosmic-ray conference held in Utah, USA and 2001 international cosmic-ray conference held in Hamburg, Germany. The flux obtained by most of air shower experiments had been giving higher value compared with our data up to 2001 conference, however, many air shower groups reported the results of flux similar to our result in 2001 conference. Moreover the result in our energy region by direct observation is only our report, and our result was highly appreciated by rapporteur.The paper about results of the data to 1996 was published in the 22nd ISTS Proceedings (Vol. 2 p1831-1836) and Astor Particle Physics (No. 16 2001, p13-46). The data of 1999 experiment is under analysis. As 1999 experiment corresponds to four times flight, and it will take more one or two years to obtain the final results. Less