Isotope Observation in the SOHO-COSTEP Research Program

CEPAC的合作，包括COSTEP财团和ERNE财团，将通过测量各种能量和种类的高能离子进行系统的研究。这些信息，加上SOHO有效载荷和其他使命中其他实验的同时观测，将有助于在了解太阳大气层和日光层中发生的现象方面取得进展。COSTEP提供LION、MEICA和EPHIN传感器。ERNE仪器由LED和HED组成，MEICA是日本粒子小组提出的，并被SOHO使命正式接受。然而，由于美国/美国航天局的预算崩溃，MEICA无法进入CEPAC。该项目已重新启动，作为SOHO和GEOTAIL上粒子实验的联合研究。GEOTAIL从太阳活动的下降到最小阶段运行，SOHO从最小到增加阶段运行。这些实验集中研究了安静的太阳和日光层，尽管这些任务已经研究了活跃的太阳。重离子进入地磁层的相关性研究涉及COSTEP和GEOTAIL-HEP通量观测之间的相关性。该合作将是一项为期6年以上的补充观察。GEOTAIL已经在WIND和SOHO等任务之前开始了粒子观测。我们可以在同位素观测中占据主动。GEOTAIL现已全面和良好地运行。通过3周的观测获得的初步结果表明，银河宇宙线中的C-Fe分离良好。由于计数次数不足以校准能量和位置的线性，同位素还没有得到分辨。未来3个月的观测，预计将解决重同位素到铁校准后。

The CEPAC collaboration, including the COSTEP consortium and the ERNE consortium, will a systematic investigation by measuring energetic ions over a wide range of energies and species. The information, combined with simultaneous observation from the other experiments in the SOHO payload and other mission, will enable a progress in understanding of the phenomena occurring at the solar atmosphere and in the heliosphere. The COSTEP provides LION, MEICA and EPHIN sensors. The ERNE instrument consists of LED and HED.Japanese particle group had proposed the MEICA and been accepted formally in the SOHO mission. The MEICA was, however, unable to get onboard in the CEPAC because of the US/NASA budgetary breakdown. This project has been restarted as the joint research of particle experiments on the SOHO and GEOTAIL. The GEOTAIL operates from the declining to the minimum phase of the solar activity, and the SOHO, from the minimum to the increasing phase. These experiments intensively study the quiet sun and the heliosphere, though the missions sofar have investigated the active sun. The correlative study to access heavy ions into the geomagnetosphere would involve a correlation between the COSTEP and GEOTAIL-HEP in the flux observations. The collaboration will be a complementary observation longer than 6 years. The GEOTAIL has already started the particle observation in advance of such missions as the WIND and SOHO. We could take the initiative in the isotope observation. The GEOTAIL is now on full and good operation. Preliminary results obtained by a 3-week-observation showed a good separation of C-Fe in the galactic cosmic rays. As the counting number is not enough to calibrate the energy and positions linearity, isotopes have not been resolved yet. The coming 3-month-observation is expected to resolve heavy isotopes up to Fe after the calibration.