Mars Odyssey measurements of galactic cosmic rays and solar particles in Mars orbit, 2002–2008
Mars Odyssey measurements of galactic cosmic rays and solar particles in Mars orbit, 2002–2008
复制标题
火星奥德赛号对火星轨道上的银河宇宙射线和太阳粒子的测量，2002-2008
DOI：
10.1029/2009sw000563
复制
发表时间：
2010
期刊：
影响因子：
3.7
通讯作者：
R. Turner
中科院分区：
文献类型：
--
作者：
C. Zeitlin;W. Boynton;I. Mitrofanov;D. Hassler;W. Atwell;T. Cleghorn;F. Cucinotta;M. Dayeh;M. Desai;S. Guetersloh;K. Kozarev;Kerry T. Lee;L. Pinsky;Premkumar B. Saganti;N. Schwadron;R. Turner
2001 火星奥德赛轨道飞行器上的仪器有效载荷包括几个对来自银河宇宙射线 (GCR) 和太阳粒子事件 (SPE) 的高能带电粒子敏感的仪器。火星辐射环境实验 (MARIE) 是一台专用的高能带电粒子光谱仪，但它在 2003 年 10 月/11 月的大型太阳风暴期间停止运行。这里使用了来自其他两台奥德赛仪器的数据：伽马射线光谱仪和高能中子探测器的闪烁体组件。虽然这两个系统主要不是为了测量高能带电粒子而设计的，但这两个系统都对它们敏感，并且都可以获得几年的数据。使用 MARIE 数据校准其他系统，计数率可以标准化（具有显着的不确定性）为 GCR 和太阳高能粒子 (SEP) 的绝对通量。这些数据涵盖了从 2002 年初到 2007 年底的时间跨度，清楚地显示了从 2004 年开始的 GCR 依赖于太阳周期的调制。许多 SPE 也被记录下来并在此处编目。阈值能量相对较高，范围从最敏感通道的 16 MeV 到 42 MeV。这些阈值对于 SEP 的详细研究来说并不是最佳的，但这是与人类飞行相关的剂量和剂量当量计算的兴趣范围，覆盖该范围是 MARIE 的最初动机。这些数据可根据要求提供，并可能用于地月火星辐射环境模块协作和其他日光层建模项目。
The instrument payload aboard the 2001 Mars Odyssey orbiter includes several instruments that are sensitive to energetic charged particles from the galactic cosmic rays (GCR) and solar particle events (SPE). The Martian Radiation Environment Experiment (MARIE) was a dedicated energetic charged particle spectrometer, but it ceased functioning during the large solar storm of October/November 2003. Data from two other Odyssey instruments are used here: the Gamma Ray Spectrometer and the scintillator component of the High Energy Neutron Detector. Though not primarily designed to measure energetic charged particles, both systems are sensitive to them, and several years of data are available from both. Using the MARIE data for calibration of the other systems, count rates can be normalized (with significant uncertainties) to absolute fluxes of both GCR and solar energetic particles (SEP). The data, which cover the time span from early 2002 through the end of 2007, clearly show the solar cycle–dependent modulation of the GCR starting in 2004. Many SPEs were recorded as well and are cataloged here. Threshold energies were relatively high, ranging from 16 MeV in the most sensitive channel to 42 MeV. These thresholds are not optimal for detailed studies of SEPs, but this is the range of interest for calculations of dose and dose equivalent, pertinent to human flight, and covering that range was the original motivation for MARIE. The data are available on request and are potentially of use for the Earth‐Moon‐Mars Radiation Environment Module collaboration and other heliospheric modeling projects.