Antarctic Long Duration Balloon Flight for the JACEE Collaboration

这笔拨款为长时间气球（LDB）飞行和被动宇宙射线成分测量分析提供部分支持。这项实验将由一个名为JACEE（日美宇宙射线乳化室实验）的合作项目完成，该项目包括来自美国、日本和波兰11个机构的近35名资深科学家。实验目的是测量超高能量（接近1015电子伏特）下的宇宙射线能谱和成分，并研究在这些能量下的核相互作用，这超出了任何加速器的能力。没有其他已知的技术可以进行类似的测量。预计JACEE集团将在未来10年内进行20次这样的LDB飞行。该项目由美国国家科学基金会、美国国家航空航天局以及日本和波兰的姐妹机构共同支持。

This grant provides partial support for long-duration balloon (LDB) balloon flights and analysis of passive cosmic ray composition measurements. The experiment will be done by a collaboration known as JACEE (Japanese American Cosmic-ray Emulsion-chamber Experiment) which includes nearly 35 senior scientists at 11 institutions from the U.S., Japan and Poland. The experimental aims are to measure the cosmic ray energy spectrum and composition at ultra high energies (approaching 1015 eV) and also to study nuclear interactions at these energies, beyond the capabilities of any accelerator. No other known technique can make similar measurements. It is the expectation of the JACEE group to make 20 such LDB flights over the next 10 years. This project is jointly supported by NSF, NASA and sister agencies in Japan and Poland.