强激光与粒子束
彊激光與粒子束
강격광여입자속
HIGH POWER LASER AND PARTICLEBEAMS
2012年
8期
1901-1906
,共6页
磁场重联%不可压缩等离子体%电荷分离%静电场
磁場重聯%不可壓縮等離子體%電荷分離%靜電場
자장중련%불가압축등리자체%전하분리%정전장
magnetic reconnection%incompressible plasmas%charge separation%electrostatic field
提出了一种2维磁场重联模型.磁场重联过程中的电荷分离在等离子体中产生静电场,等离子体在电场中的漂移运动可以解释阿尔芬速度量级的出流.该磁场重联模型给出如下结论:Sweet- Parker模型描述的重联率强烈地依赖于电子质量与离子质量之比;反常电阻率正比于离子惯性长度和电流片宽度比值的平方;相对论效应和高温等离子体中电子-正电子对的产生可以提高重联率;电磁波的激发对于磁能的损耗是必要的.
提齣瞭一種2維磁場重聯模型.磁場重聯過程中的電荷分離在等離子體中產生靜電場,等離子體在電場中的漂移運動可以解釋阿爾芬速度量級的齣流.該磁場重聯模型給齣如下結論:Sweet- Parker模型描述的重聯率彊烈地依賴于電子質量與離子質量之比;反常電阻率正比于離子慣性長度和電流片寬度比值的平方;相對論效應和高溫等離子體中電子-正電子對的產生可以提高重聯率;電磁波的激髮對于磁能的損耗是必要的.
제출료일충2유자장중련모형.자장중련과정중적전하분리재등리자체중산생정전장,등리자체재전장중적표이운동가이해석아이분속도량급적출류.해자장중련모형급출여하결론:Sweet- Parker모형묘술적중련솔강렬지의뢰우전자질량여리자질량지비;반상전조솔정비우리자관성장도화전류편관도비치적평방;상대론효응화고온등리자체중전자-정전자대적산생가이제고중련솔;전자파적격발대우자능적손모시필요적.
A modified two-dimensional magnetic reconnection model is presented which focuses on the role of electrostatic field generated by charge separation in magnetic reconnection,and the E cross B drift causing the Alfvénic outflows.This reconnection model reveals that the reconnection rate described in Sweet-Parker model is strongly dependent on the ratio of the electron mass and the ion mass,and the effective local resistivity normalized by the Spitzer resistivity is proportional to the square of the ratio of the ion skin depth to the width of the current sheet.The relativistic effect and creation of electron-positron pairs in high temperature plasmas can enhance the reconnection rate.The excitation of electromagnetic waves is necessary for dissipation of magnetic energy.
