Nonlinear full-wave analysis of atmospheric luminous emissions above lightning discharges
闪电放电上方大气光发射的非线性全波分析
基本信息
- 批准号:13640447
- 负责人:
- 金额:$ 2.05万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2001
- 资助国家:日本
- 起止时间:2001 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
We have investigated the generation mechanism of "elves," the expanding optical rings created 85-95 km above lightning flashes. Elves are believed to be generated through the excitation of the first positive band of nitrogen molecule, which is stimulated by the electron heating due to the lightning-generated intense electromagnetic pulses (EMPs) illuminating the lower ionosphere. By using a full-wave analysis, we have computed rigorously the propagation in a magnetized ionosphere of the EMPs radiated by lightning current strokes. When incident into the lower ionosphere, an intense EMP heats the electrons and then enhances the collision frequency there, causing the absorption of the EMP energy. Though the full wave analysis cannot treat such a nonlinear temporal change of ionospheric parameters, we have approximately incorporated this effect into the calculation by modifying the up-going EMP in the ionosphere. Making use of a newly developed parallel-computation system with 10 PCs, we have computed the temporal and spatial evolution of elves. Computed results have shown that an optical ring is created at the altitudes of 85-100 km above the lightning, quickly expanding horizontally over 200 km within < 1 ms, which is consistent with the actual observations of elves. It has also been found that because of the EMP propagation in the whistler mode along the Earth's magnetic field line above 90 km, there appears appreciable north-south and east-west asymmetry in the elves ring structures.
我们研究了“精灵”的产生机制,即在闪电上方 85-95 公里处产生的不断扩大的光学环。精灵被认为是通过氮分子第一正带的激发而产生的,该氮分子是由闪电产生的强电磁脉冲(EMP)照射较低电离层而产生的电子加热所刺激的。通过使用全波分析,我们严格计算了雷电电流冲击辐射的电磁脉冲在磁化电离层中的传播。当入射到较低的电离层时,强烈的电磁脉冲会加热电子,然后提高那里的碰撞频率,导致电磁脉冲能量的吸收。虽然全波分析无法处理电离层参数的这种非线性时间变化,但我们通过修改电离层中的上行电磁脉冲,大致将这种效应纳入计算中。利用新开发的10台PC并行计算系统,我们计算了精灵的时间和空间演化。计算结果表明,在闪电上方85-100公里的高度处形成了一个光学环,并在<1毫秒内迅速水平扩展超过200公里,这与精灵的实际观察结果一致。研究还发现,由于电磁脉冲沿90公里以上地球磁场线以哨声模式传播,精灵环结构出现明显的南北向和东西向不对称性。
项目成果
期刊论文数量(15)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
高野 博史, 長野 勇, 八木谷 聡, 福岡 将, 松本 絋: "地球磁気圏遠尾部におけるLobe Trapped Continuum Radiationの伝搬特性"電子情報通信学会論文誌. J84-B・12. 2358-2366 (2001)
Hiroshi Takano、Isamu Nagano、Satoshi Yagitani、Masashi Fukuoka 和 Akira Matsumoto:“地球磁层远端的波瓣捕获连续辐射的传播特性”电子信息通信工程师学会会刊 J84-B・12。 2358-2366 (2001)
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
H. Takano, I. Nagano, and S. Yagitani: "Analysis of electromagnetic wave propagation with resonance effect in collision-free magnetized plasma (in Japanese)"The Transactions of IEICE B. in press. (2003)
H. Takano、I. Nagano 和 S. Yagitani:“无碰撞磁化等离子体中具有共振效应的电磁波传播分析(日文)”《IEICE B. 报》出版。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Y.Yoshimura, I.Nagano, S.Yagitani, S.Shinmura: "FDTD analysis of electromagnetic shielding effectiveness of obliquely incident waves"The Transactions of IEE of Japan A. 121-A. 964-965 (2001)
Y.Yoshimura、I.Nagano、S.Yagitani、S.Shinmura:“斜入射波电磁屏蔽效能的FDTD分析”日本IEE Transactions A.121-A。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
高野博史, 長野勇, 八木谷聡, 福岡将, 松本紘: "地球磁気圏遠尾部におけるLobe Trapped Continuum Radiationの伝搬特性"電子情報通信学会論文誌. J84-B. 2358-2366 (2001)
Hiroshi Takano、Isamu Nagano、Satoshi Yagitani、Masashi Fukuoka 和 Hiroshi Matsumoto:“地球磁层远端的波瓣捕获连续辐射的传播特性”IEICE Transactions J84-2366 (2001)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
I.Nagano, X-Y.Wu, H.Takano, S.Yagitani, H.Matsumoto, K.Hashimoto, Y.Kasaba: "Remote sensing the magnetosheath by the spin modulation of terrestrial continuum radiation"Journal of Geophysical Research. (印刷中). (2003)
I.Nagano、X-Y.Wu、H.Takano、S.Yagitani、H.Matsumoto、K.Hashimoto、Y.Kasaba:“通过地球连续辐射的自旋调制来遥感磁鞘”(地球物理研究杂志)。 2003)
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
NAGANO Isamu其他文献
NAGANO Isamu的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('NAGANO Isamu', 18)}}的其他基金
Development of Cancer Treatment System by Induction heating
感应加热癌症治疗系统的开发
- 批准号:
17200034 - 财政年份:2005
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Scientific Research (A)
Development of Cancer Treatment System by Induction Heating
感应加热癌症治疗系统的开发
- 批准号:
15300179 - 财政年份:2003
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of a new system for determination of lightning locations via wave form observations of spherics
开发通过球体波形观测确定闪电位置的新系统
- 批准号:
11640440 - 财政年份:1999
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Study of Generation Mechanism of Lunimous Emissions in the Upper Atmosphere Produced by Lightning Discharge
高层大气闪电放电产生机制研究
- 批准号:
09640530 - 财政年份:1997
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Propagation Experiment of VLF Electromagnetic Pulses in the Deep Underground
甚低频电磁脉冲在地下深处的传播实验
- 批准号:
07650421 - 财政年份:1995
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Propagation Experiment of VLF Electromagnetic Pulses in the Uuderground for Development of Deep Earth Radar
深地雷达研制中甚低频电磁脉冲地下传播实验
- 批准号:
05650350 - 财政年份:1993
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
PROPAGATION EXPERIMENT AND THEORY OF THE VLF ELECTROMAGNETIC PULSE WAVE IN THE UNDERGROUND
甚低频电磁脉冲波在地下传播实验与理论
- 批准号:
03650321 - 财政年份:1991
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Theoretical Estimation and Observation of the Wave Field Intensity on the Ground Radiated by an Electron Beam Antenna in the Ionosphere
电离层电子束天线辐射地面波场强度的理论估算与观测
- 批准号:
01540349 - 财政年份:1989
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Observation and prediction of the wave intensity on the ground radiated by and electron beam antenna
电子束天线对地面辐射波强的观测与预测
- 批准号:
61550238 - 财政年份:1986
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
相似海外基金
Target Plasma Generation for Plasma Acceleration and Associated Electromagnetic Pulse Dynamics
用于等离子体加速和相关电磁脉冲动力学的目标等离子体生成
- 批准号:
2206647 - 财政年份:2022
- 资助金额:
$ 2.05万 - 项目类别:
Standard Grant
CEDAR: Modification of Ionosphere by Lightning ElectroMagnetic Pulse (LEMP): Dependence on Lightning Type, Stroke Order, and Other Factors
CEDAR:闪电电磁脉冲 (LEMP) 对电离层的改变:取决于闪电类型、行程顺序和其他因素
- 批准号:
2055178 - 财政年份:2021
- 资助金额:
$ 2.05万 - 项目类别:
Standard Grant
Development of Vibro-Radar with Electromagnetic Pulse for Deterioration Diagnosis Application of Rebar Vibration Spectroscopy
电磁脉冲振动雷达的研制用于钢筋振动光谱劣化诊断的应用
- 批准号:
20H02395 - 财政年份:2020
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of three-dimensional printing conductive concrete for electromagnetic pulse shielding
电磁脉冲屏蔽用三维打印导电混凝土的研制
- 批准号:
DP180104035 - 财政年份:2018
- 资助金额:
$ 2.05万 - 项目类别:
Discovery Projects
Research on high-repetition electromagnetic pulse train with phase shift
相移高重复电磁脉冲串研究
- 批准号:
17K18884 - 财政年份:2017
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Challenging Research (Exploratory)
Spontaneous oscillation of monocycle electromagnetic pulse in a metamaterial loaded with air as a nonlinear element
负载空气作为非线性元件的超材料中单周期电磁脉冲的自发振荡
- 批准号:
16K14249 - 财政年份:2016
- 资助金额:
$ 2.05万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Interaction of Lightning Electromagnetic Pulse with the Ionosphere
闪电电磁脉冲与电离层的相互作用
- 批准号:
1521747 - 财政年份:2015
- 资助金额:
$ 2.05万 - 项目类别:
Continuing Grant
European EMC Products - Developing a prototype Portable Electromagnetic Pulse Test (PEMPT)
欧洲 EMC 产品 - 开发便携式电磁脉冲测试 (PEMPT) 原型
- 批准号:
720508 - 财政年份:2014
- 资助金额:
$ 2.05万 - 项目类别:
GRD Development of Prototype
Collaborative Research: Electromagnetic Pulse Cutting of Metallic Components
合作研究:金属部件的电磁脉冲切割
- 批准号:
1232458 - 财政年份:2012
- 资助金额:
$ 2.05万 - 项目类别:
Standard Grant
Collaborative Research: Electromagnetic Pulse Cutting of Metallic Components
合作研究:金属部件的电磁脉冲切割
- 批准号:
1232668 - 财政年份:2012
- 资助金额:
$ 2.05万 - 项目类别:
Standard Grant