English  |  正體中文  |  简体中文  |  Items with full text/Total items : 69937/69937 (100%)
Visitors : 23317022      Online Users : 295
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27903

    Title: Ambipolar diffusion-driven tearing instability in a steepening background magnetic field
    Authors: Chiueh,T
    Contributors: 天文研究所
    Date: 1998
    Issue Date: 2010-06-29 19:35:50 (UTC+8)
    Publisher: 中央大學
    Abstract: Tearing instability is shown to be greatly enhanced by ambipolar diffusion near the locations where two-dimensional magnetic fields reverse signs. The growth time is found to be on the order of the ambipolar diffusion timescale, independent of electrical resistivity. Consistent with the earlier works, the enhancement in the reconnection of field lines indeed arises from the development of a singular current perturbation. Such magnetic reconnection is driven by the steepening effect of ambipolar diffusion on the magnetic fields near the held-reversal lines. Although the background magnetic fields are evolving on a similar timescale as the perturbations, we show that magnetic reconnection proceeds substantially faster than the steepening of the background fields. In contrast to the conventional tearing instabilities in three dimensions, where the magnetic reconnection occurs only in the flux surfaces that contain the free energy, a positive Delta', the three-dimensional extension of this new tearing instability can occur only in regions where the Lorentz force reverses the sign. This report outlines how the three-dimensional reconnection may proceed in a similar fashion as the two-dimensional counterpart does.
    Appears in Collections:[天文研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明