Scholarlink

<p>Current sheets (CSs) are ubiquitous structures in space plasmas such as the solar corona, solar wind, and planetary magnetospheres. They can be frequently formed at boundaries separating plasmas with distinct properties or discontinuities. In this article, we investigate the appearance of a CS within the turbulent sheath region of an interplanetary coronal mass ejection (ICME) at 1 au, utilizing data from the Advance Composition Explorer (ACE) and Wind spacecraft. Focusing on the ICME event of February 20 – 21, 2000, we identify a CS uniquely “sandwiched” between two quasi-planar magnetic structures. Analysis of particle fluxes from the Electron, Proton, and Alpha Monitor (EPAM) on board ACE reveals distinct enhancements in electron and ion/proton populations during the CS traversal. The enhancement in particle flux is different from the ICME shock. Elevated fluxes of high-energy Fe (0.080 to 0.90&#xa0;MeV) and O (0.090 to 1.29&#xa0;MeV) ions from the Ultra-Low Energy Isotope Spectrometer (ULEIS) are observed within the CS region. Furthermore, spectral indices for electrons and protons display shifts between pre-CS and post-CS regions, indicative of differing particle dynamics in these regions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Current Sheet Formation in a Turbulent ICME Sheath and Associated Particle Enhancement

  • 期刊论文

  • 发表日期：

    2026年3月18日

查看全文
  • Kalpesh Ghag,
  • Anil Raghav,
  • Omkar Dhamane,
  • Kishor Kumbhar,
  • Ankush Bhaskar,
  • Ajay Kumar,
  • Mohit Shah,
  • Mariyam Karari,
  • Shibotosh Biswas

摘要

Current sheets (CSs) are ubiquitous structures in space plasmas such as the solar corona, solar wind, and planetary magnetospheres. They can be frequently formed at boundaries separating plasmas with distinct properties or discontinuities. In this article, we investigate the appearance of a CS within the turbulent sheath region of an interplanetary coronal mass ejection (ICME) at 1 au, utilizing data from the Advance Composition Explorer (ACE) and Wind spacecraft. Focusing on the ICME event of February 20 – 21, 2000, we identify a CS uniquely “sandwiched” between two quasi-planar magnetic structures. Analysis of particle fluxes from the Electron, Proton, and Alpha Monitor (EPAM) on board ACE reveals distinct enhancements in electron and ion/proton populations during the CS traversal. The enhancement in particle flux is different from the ICME shock. Elevated fluxes of high-energy Fe (0.080 to 0.90 MeV) and O (0.090 to 1.29 MeV) ions from the Ultra-Low Energy Isotope Spectrometer (ULEIS) are observed within the CS region. Furthermore, spectral indices for electrons and protons display shifts between pre-CS and post-CS regions, indicative of differing particle dynamics in these regions.