OBSERVATION OF HIGH ENERGY COSMIC-RAY WITH SUPERCONDUCTING SPECTROMETER

计划与KEK、东京大学、日本宇宙航空研究所、科比大学和新墨西哥州州立大学合作，在加拿大北部的林恩湖进行超导螺线管磁体分光计的机载实验，以研究宇宙射线和天体粒子物理学。主要目的是在宇宙射线中寻找原始反物质存在的证据，以研究宇宙早期历史中发生的物质/反物质不对称性。优化了带有薄超导磁体的圆柱形谱仪配置，为这些科学目标提供了0.5 - 1.0 m2 sr的大几何接受度。1990年，加拿大进行了第一次初步活动，以调查最佳气球飞行地点，并确定了加拿大马尼托巴的林恩湖作为气球飞行的地点，因为那里的地质条件最好，非常接近磁北极（垂直磁场较大）。 ...更多信息 IELD分量）和非常空的地方。第二次活动于1991年进行，并进行了初步实验，以验证可能的大型气球发射。1992年夏天计划了一次科学的热气球飞行，并在林恩湖准备了热气球飞行实验。不幸的是，气球在1992年没有实现，因为在预定发射前的适当时间内无法达成外交协议。然而，气球的准备工作已经完成，并进行了发射的技术演习，在地面上观察到了宇宙射线事件。作为总结，这项联合研究项目取得了以下成果。对热气球飞行地点进行了地质调查，林恩湖被选为最佳热气球飞行地点。在加拿大的林恩湖进行了热气球飞行的准备和初步实验，为教育科学文化部批准的下一个项目的科学主飞行做好了准备。少

Balloon-borne experiment with a superconducting solenoidal magnet spectrometer has been planned to be carried out at Lynn Lake in north Canada in cooperation amongst KEK, University of Tokyo, ISAS, Kobe University and New Mexico State University to investigate cosmic-ray and astro-particle physics. The primary objective is to search for evidence of primordial antimatter in cosmic-rays to study assymmetry of matter/antimatter happened in early history of Universe. The cylindrical spectrometer configuration with a thin superconducting magnet is optimized to provide a large geometrical acceptance of 0.5 - 1.0 m2sr for these scientific objectives.The joint research project has been carried out since JFY 1990. The first preliminary campaign to Canada was carried out in 1990 to survey for optimum ballooning place, and the location of Lynn lake, Manitoba, Canada, was fixed for the ballooning because of the best geological condition very close to magnetic north pole (larger vertical magnetic f … More ield component) and of very empty place. The second campaign was carried out in 1991 and preliminary experiment was carried out to verify a possible large balloon launching. A scientific ballooning was planned in summer of 1992, and the experiment was prepared at Lynn lake for ballooning. Unofortunately, the ballooning was not realized in 1992, because a diplomatic agreement could not in plance within an appropriate time before the scheduled launching. However, the ballooning preparation has been completed and a technical rehearsal for launching was performed and cosmic ray events were observed on ground.As a summary, the following results have been obtained in this joint research project.- Geological survey for ballooning place was made and Lynn Lake was chosen as the best place for ballooning.- Preparation and preliminary experiment for ballooning have been experienced at Lynn Lake, Canada.The experiment has become ready for scientific main flight to be carried out in the next project which has been approved by Ministry of Education, Science and Culture. Less