Study on High-energy Particle Acceleration Mechanism during Solar Flares

太阳耀斑高能粒子加速机理研究

• 批准号: 03640247
• 负责人: SAKAI Jun-ichi
• 金额: $ 1.22万
• 依托单位: Toyama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640247/
• 关键词: Solar Flares; Particle Acceleration; Loop Coalescence Interaction; Magnetic Reconnection; X-rays; Gamma-rays; Solar Plasma; Coronal Heating; ル-プ合体相互作用

We made clear the following points about the energy release process and the particle acceleration mechanism during Solar Flares.(1)We found that there exist two types of magnetic reconnection process;Complete and Partial reconnection during the two current loop coalescence in solar flares. These types of reconnection were observed by the YOHKOH.(2)We showed that there exist three types of current of current loop collision;I,Y and X type and those have different signatures for the energy release. We found I and X type coalescence processes in the YOHKOH data, which show a good agreement with our theoretical results.(3)We found that during two current loops collision the fast magnetosonic shock waves can be generated within a very short time by MHD simulation.(4)We found by 3D particle code that during two current loops collision plasma waves and whistler waves can be generated and mat contribute to plasma heating.(5)We found that two current loop coalescence process is important for the prominence formation,if we take into account the cooling effect.

我们对太阳耀斑期间的能量释放过程和粒子加速机制作了以下几点说明。(1)We发现太阳耀斑中两个电流环并合过程中存在两种类型的磁重联过程：完全重联和部分重联。YOHKOH观察到了这些类型的重新连接。(2)We结果表明，电流环碰撞存在I、Y和X三种类型的电流，它们的能量释放特征不同。在YOHKOH数据中发现了I型和X型聚并过程，这与我们的理论结果吻合得很好。(3)We通过MHD模拟发现，在两个电流环碰撞过程中，可以在很短的时间内产生快磁声激波。(4)We通过三维粒子程序发现，在两个电流环碰撞过程中，可以产生等离子体波和哨声波，并有助于等离子体加热。(5)We发现如果考虑冷却效应，两个电流环的合并过程对日珥的形成是重要的。

项目成果

J.Zhao: "Charocteristics of Plasma Temperaturo Variation during Two Current Loops Collision" Solar Physics. (1993)

J.Zhao：“两个电流环碰撞时等离子体温度变化的特征”太阳物理。

J.Sakai,C.de Jager: "Highーenergy Flare Explosions driven by 3ーdimensional Xーtype Current Loop Coalescence" Solar Physics. 134. 329-353 (1991)

J. Sakai、C. de Jager：“3 维 X 型电流环聚结驱动的高能耀斑爆炸”太阳物理学 134. 329-353 (1991)。

J.-I. Sakai: "Prompt Particle Acceleration around Moving X-point Magnetic Field during Impulsive Phase of Solar Flares" Solar Physics. 140. 99 (1992)

J.-I。

J.-I. Sakai and S. Koide: "Classification of Magnetic Reconnection during Two Current Loop Coalescence" Solar Physics. 142. 399 (1992)

J.-I。

B. Chargeishvili, J. Zhao and J.-I. Sakai: "Dynamics of Physical State during Two Current Loops Collision" Solar Physics. (1993)

B. Chargeishvili、J. 赵和 J.-I。