Small-Scale Composition Variations and the Origin of the Solar Wind

太阳风的微观太阳源区仍然未知。最近在Hinode和SDO上使用高分辨率遥感仪器进行的观测揭示了显著的小范围且往往是短时间的现象，据信这些现象是太阳风的来源。典型的时间范围从几小时到几天不等。这比通常用于太阳风的现场成分研究的时标更快。太阳风的小范围或快速变化在过去很少被研究，主要是因为仪器的限制。我们建议用SOHO/CELIAS/MTOF和CTOF以及ACE/SWICS来测量太阳风的这种短期成分波动，并将它们与太阳表面联系起来，以确定单个太阳风块的微观起源。

The microscopic solar source regions of the solar wind are still not known. Recent observations with high-resolution remote-sensing instrumentation on Hinode and SDO have revealed remarkable small-scale and often short-time phenomena which are believed to feed into the solar wind. Typical times scales range from hours to days. This is faster than the time scales commonly used for in-situ composition studies in the solar wind. Small-scale or fast variations in the solar wind have only very rarely been studied in the past mainly because of instrumental limitations. We propose to measure such short-term composition fluctuations in the solar wind with SOHO/CELIAS/MTOF and CTOF and ACE/SWICS and relate them to the solar surface to determine the microscopic origin of individual solar wind parcels.