Direct observation of turbulent magnetic fields in hot, dense laser produced plasmas

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Direct observation of turbulent magnetic fields in hot, dense laser produced plasmas
	Mondal, S ; Narayanan, V ; Ding, WJ ; Lad, AD ; Hao, BA ; Ahmad, S ; Wang, WM ; Sheng, ZM ; Sengupta, S ; Kaw, P ; Das, A ; Kumar, GR
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2012
卷号	109 期号:21 页码:8011
关键词	IN-CELL SIMULATION CHARGE CONSERVATION COLLISIONS IGNITION
ISSN号	0027-8424
通讯作者	Sheng, ZM: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	Turbulence in fluids is a ubiquitous, fascinating, and complex natural phenomenon that is not yet fully understood. Unraveling turbulence in high density, high temperature plasmas is an even bigger challenge because of the importance of electromagnetic forces and the typically violent environments. Fascinating and novel behavior of hot dense matter has so far been only indirectly inferred because of the enormous difficulties of making observations on such matter. Here, we present direct evidence of turbulence in giant magnetic fields created in an overdense, hot plasma by relativistic intensity (10(18)W/cm(2)) femtosecond laser pulses. We have obtained magneto-optic polarigrams at femtosecond time intervals, simultaneously with micrometer spatial resolution. The spatial profiles of the magnetic field show randomness and their k spectra exhibit a power law along with certain well defined peaks at scales shorter than skin depth. Detailed two-dimensional particle-in-cell simulations delineate the underlying interaction between forward currents of relativistic energy "hot" electrons created by the laser pulse and "cold" return currents of thermal electrons induced in the target. Our results are not only fundamentally interesting but should also arouse interest on the role of magnetic turbulence induced resistivity in the context of fast ignition of laser fusion, and the possibility of experimentally simulating such structures with respect to the sun and other stellar environments.
收录类别	SCI
资助信息	DAE-SRC-ORI (Government of India); Department of Science and Technology (Government of India); Natural Science Foundation of China [11075105, 11121504]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/36068]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Mondal, S,Narayanan, V,Ding, WJ,et al. Direct observation of turbulent magnetic fields in hot, dense laser produced plasmas[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2012,109(21):8011.
APA	Mondal, S.,Narayanan, V.,Ding, WJ.,Lad, AD.,Hao, BA.,...&Kumar, GR.(2012).Direct observation of turbulent magnetic fields in hot, dense laser produced plasmas.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,109(21),8011.
MLA	Mondal, S,et al."Direct observation of turbulent magnetic fields in hot, dense laser produced plasmas".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 109.21(2012):8011.