U.S.-Japan Cooperative Research: Composition and Interactions of Ultra-high Energy Cosmic Rays

该奖项支持为期两年的美国-日本合作研究 John Wefel教授和Michael Cherry教授之间的项目， 美国路易斯安那州立大学物理与天文系， 宇宙射线研究所的绪方武教授 东京大学。 它是日裔美国人的一部分， 合作乳化实验（JACEE），始于1978年 研究高能核的物理学 能量高于加速器的能量， 研究初级宇宙射线的核成分 大范围空气簇射（EAS）区域。 关于JACEE 合作涉及美国的四个机构， 8在日本 日本生产世界上最高质量的核乳胶， 日本研究人员率先使用乳胶室。 美国的科学家们已经开发出了一种技术， 高空气球飞行，包括最新的长时间 增强（LDB）能力。 这两个国家的实验室 装备精良，可进行详细的显微镜测量 参与分析乳胶室中的粒子事件。 这 拨款将允许美国调查人员前往合作 日本的机构。 为这笔赠款做出贡献的是国家科学基金会 物理部，这将支持运费和成本 调查人员前往气球飞行地点的旅行 澳大利亚

This award supports a two-year U.S.-Japan cooperative research project between Professors John Wefel and Michael Cherry, Department of Physics and Astronomy, Louisiana State University, and Professor Takeshi Ogata, Institute for Cosmic Ray Research, University of Tokyo. It is part of the Japanese-American Cooperative Emulsion Experiment (JACEE), which began in 1978 to investigate the physics of high energy nucleus-nucleus interactions at energies above those available at accelerators and for studying the nuclear composion of primary cosmic rays extending up to the extensive air shower (EAS) region. The JACEE Collaboration involves four institutions in the United States and eight in Japan. Japan produces the world's highest quality nuclear emulsion and Japanese researchers pioneered the use of emulsion chambers. Scientists in the United States have developed the technology for high altitude balloon flights, including the newest Long Duration Ballooning (LDB) capability. Laboratories in both countries are well equipped to carry out detailed microscope measurements involved in analyzing particle events in emulsion chambers. This grant will permit the U.S. investigators to travel to collaborating institutions in Japan. Contributing to this grant is the NSF Division of Physics, which will support shipping costs and the costs of travel of the investigators to the site of balloon flights in Australia.