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国家自然科学基金(11274152)

作品数:3 被引量:0H指数:0
相关作者:施建荣陈明蒋柏彬乔占峰张杰更多>>
相关机构:北京应用物理与计算数学研究所马里兰大学中国科学技术大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划更多>>
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3 条 记 录,以下是 1-3
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Ray tracing method for the grazing incidence flat-field imaging soft X-ray spectrometer
2014年
A ray tracing method is introduced for helping adjustment and spectra analysis of the grazing incidence flat-field imaging soft X-ray spectrometer. For a single point source, the spectra images obtained by separate components, the toroidal mirror, and the grazing incidence flat-field concave grating with varied line spaces are given respectively. The calculated spectral images of the single point source by the spectrometer are also given for comparison with measurements with different experimental alignments.
董全力刘运全腾浩李英骏张杰
Anomalous-plasmoid-ejection-induced secondary magnetic reconnection: modeling solar flares and coronal mass ejections by laser–plasma experiments
2013年
The driving mechanism of solar flares and coronal mass ejections is a topic of ongoing debate, apart from the consensus that magnetic reconnection plays a key role during the impulsive process. While present solar research mostly depends on observations and theoretical models, laboratory experiments based on high-energy density facilities provide the third method for quantitatively comparing astrophysical observations and models with data achieved in experimental settings.In this article, we show laboratory modeling of solar flares and coronal mass ejections by constructing the magnetic reconnection system with two mutually approaching laser-produced plasmas circumfused of self-generated megagauss magnetic fields. Due to the Euler similarity between the laboratory and solar plasma systems, the present experiments demonstrate the morphological reproduction of flares and coronal mass ejections in solar observations in a scaled sense,and confirm the theory and model predictions about the current-sheet-born anomalous plasmoid as the initial stage of coronal mass ejections, and the behavior of moving-away plasmoid stretching the primary reconnected field lines into a secondary current sheet conjoined with two bright ridges identified as solar flares.
Quanli DongDawei YuanShoujun WangXun LiuYutong LiXiaoxuan LinHuigang WeiJiayong ZhongShaoen JiangYongkun DingBobin JiangKai DuYongjian TangMingyang YuXiantu HeNeng HuaZhanfeng QiaoKuixi HuangMing ChenJianqiang ZhuGang ZhaoZhengming ShengJie Zhang
关键词:RECONNECTIONLASERPLASMACORONALEJECTION
激光等离子体模拟研究日地磁场活动特征
2013年
激光等离子体磁重联实验再现了卫星观测到的日地磁场活动特征。一方面,实验再现了太阳冕区物质抛射及耀斑结构,包括明亮的尖屋顶状环、具有微细结构的磁化等离子体团以及二者之间因为磁场拉扯而产生的二阶电流片。另一方面,实验发现存在三个电子扩散区(EDR),这与欧洲空间局Cluster卫星先后在2003年和2005年发现的分别处于地磁尾重联区中间部位及两侧分形线位置的两类EDR结构相似。所不同的是,在激光等离子体磁重联实验中,两类EDR在一次重联过程中产生,但中心EDR出现时间晚于两侧EDR,且其发展速度更快,喷流速度接近或者超过迎流Alfven速度。通过对太阳耀斑附近、地磁尾重联区以及激光等离子体自生磁场重联区位置等离子体的参数比较,显示三者在一定程度上具有Euler-Alfven相似性,这表明可以通过激光等离子体自生磁场的重联过程来研究其他两种等离子体中的磁重联现象。
董全力王首钧袁大伟陆全明黄灿刘勋李玉同林晓宣魏会冈仲佳勇施建荣江少恩丁永坤蒋柏彬杜凯华能乔占峰黄奎喜陈明贺贤土郁明阳刘全生王水唐永健朱健强赵刚盛政明张杰
关键词:太阳耀斑磁重联
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