Antarctic Long Duration Balloon Flight for the JACEE Collaboration

这一行动将完成对南极大陆上空高海拔高能宇宙线的测量分析。气球飞行是日美宇宙线乳胶室实验(JACEE)的一部分，JACEE是一项对能量大于1TeV的初级宇宙线进行的国际合作研究。极高能量的宇宙射线显示出一些意想不到的、目前无法解释的行为。在大约1000TeV以上，粒子的通量比外推源过程的强度所预期的要小得多，虽然几个合理的加速和传播物理模型可以解释通量斜率作为能量曲线的函数的变化，但需要更多的原始数据来确定哪个模型是正确的。目前，Jacee计划关于宇宙射线的初级光谱和成分的结果被粒子天体物理学社区广泛用作非常高能量范围内光谱的标准参考。

This action will complete the analysis of measurements of high energy cosmic rays made at high altitudes over the antarctic continent. The balloon flights were part of the Japanese American Cosmic Ray Emulsion Chamber Experiment (JACEE), an internationally cooperative study of primary cosmic rays at energies greater than 1 TeV. Extremely high energy cosmic rays show some unexpected and currently unexplained behavior. Above approximately 1000 TeV the flux of particles is much less than is expected from extrapolating the intensity of source processes, and while several reasonable physical models of acceleration and propagation can account for the change in the slope of the flux as a function of energy curve, more primary data is needed to determine which model is the correct one. Currently, results from the JACEE program on the primary spectrum and composition of cosmic rays are widely used by the particle astrophysics community as a standard reference for spectra in the very high energy range.