scholarly journals Magnetic reconnection driven by intense lasers

2018 ◽  
Vol 6 ◽  
Author(s):  
Jiayong Zhong ◽  
Xiaoxia Yuan ◽  
Bo Han ◽  
Wei Sun ◽  
Yongli Ping
Keyword(s):  
Magnetic Reconnection ◽  
Target Surface ◽  
Diffusion Region ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Plasma Interactions ◽  
Guide Field ◽  
Laser Plasmas ◽  
Basic Physics ◽  
Solar Plasmas

Laser-driven magnetic reconnection (LDMR) occurring with self-generated B fields has been experimentally and theoretically studied extensively, where strong B fields of more than megagauss are spontaneously generated in high-power laser–plasma interactions, which are located on the target surface and produced by non-parallel temperature and density gradients of expanding plasmas. For properties of the short-lived and strong B fields in laser plasmas, LDMR opened up a new territory in a parameter regime that has never been exploited before. Here we review the recent results of LDMR taking place in both high and low plasma beta environments. We aim to understand the basic physics processes of magnetic reconnection, such as particle accelerations, scale of the diffusion region, and guide field effects. Some applications of experimental results are also given especially for space and solar plasmas.

Coded aperture x-ray imaging of high power laser-plasma interactions on the Vulcan Laser System

2018 ◽  
Author(s):  
Robert I. Heathcote ◽  
Nicola Booth ◽  
Robert J. Clarke ◽  
Asha Anderson-Asubonteng ◽  
Matthew P. Selwood ◽  
...  
Keyword(s):  
High Power ◽  
Laser Plasma ◽  
Laser System ◽  
Coded Aperture ◽  
High Power Laser ◽  
Power Laser ◽  
Plasma Interactions ◽  
X Ray ◽  
Laser Plasma Interactions ◽  
X Ray Imaging

scholarly journals Density cavity in magnetic reconnection diffusion region in the presence of guide field

2011 ◽  
Vol 116 (A6) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. Zhou ◽  
Y. Pang ◽  
X. H. Deng ◽  
Z. G. Yuan ◽  
S. Y. Huang
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Guide Field

scholarly journals Innovative education and training in high power laser plasmas (PowerLaPs) for plasma physics, high power laser matter interactions and high energy density physics: experimental diagnostics and simulations

2020 ◽  
Vol 8 ◽  
Author(s):  
John Pasley ◽  
Georgia Andrianaki ◽  
Andreas Baroutsos ◽  
Dimitri Batani ◽  
Emmanouil P. Benis ◽  
...  
Keyword(s):  
Plasma Physics ◽  
High Power ◽  
High Energy ◽  
High Energy Density ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Plasmas ◽  
The University ◽  
And Training ◽  
Experimental Diagnostics

The second and final year of the Erasmus Plus programme ‘Innovative Education and Training in high power laser plasmas’, otherwise known as PowerLaPs, is described. The PowerLaPs programme employs an innovative paradigm in that it is a multi-centre programme, where teaching takes place in five separate institutes with a range of different aims and styles of delivery. The ‘in-class’ time is limited to 4 weeks a year, and the programme spans 2 years. PowerLaPs aims to train students from across Europe in theoretical, applied and laboratory skills relevant to the pursuit of research in laser plasma interaction physics and inertial confinement fusion. Lectures are intermingled with laboratory sessions and continuous assessment activities. The programme, which is led by workers from the Hellenic Mediterranean University and supported by co-workers from the Queen’s University Belfast, the University of Bordeaux, the Czech Technical University in Prague, Ecole Polytechnique, the University of Ioannina, the University of Salamanca and the University of York, has just finished its second and final year. Six Learning Teaching Training activities have been held at the Queen’s University Belfast, the University of Bordeaux, the Czech Technical University, the University of Salamanca and the Institute of Plasma Physics and Lasers of the Hellenic Mediterranean University. The last of these institutes hosted two 2-week-long Intensive Programmes, while the activities at the other four universities were each 5 days in length. In addition, a ‘Multiplier Event’ was held at the University of Ioannina, which will be briefly described. In this second year, the work has concentrated on training in both experimental diagnostics and simulation techniques appropriate to the study of plasma physics, high power laser matter interactions and high energy density physics. The nature of the programme will be described in detail, and some metrics relating to the activities carried out will be presented. In particular, this paper will focus on the overall assessment of the programme.

scholarly journals Magnetospheric Multiscale Observations of the Electron Diffusion Region of Large Guide Field Magnetic Reconnection

2016 ◽  
Vol 117 (1) ◽  
Author(s):  
S. Eriksson ◽  
F. D. Wilder ◽  
R. E. Ergun ◽  
S. J. Schwartz ◽  
P. A. Cassak ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Guide Field ◽  
Magnetospheric Multiscale

scholarly journals Measuring magnetic flux suppression in high-power laser–plasma interactions

2022 ◽  
Vol 29 (1) ◽  
pp. 012701
Author(s):  
P. T. Campbell ◽  
C. A. Walsh ◽  
B. K. Russell ◽  
J. P. Chittenden ◽  
A. Crilly ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
High Power ◽  
Laser Plasma ◽  
High Power Laser ◽  
Power Laser ◽  
Plasma Interactions ◽  
Laser Plasma Interactions

Extension of the Electron Diffusion Region in a Guide Field Magnetic Reconnection at Magnetopause

2020 ◽  
Vol 892 (1) ◽  
pp. L5 ◽  
Author(s):  
Z. H. Zhong ◽  
M. Zhou ◽  
R. X. Tang ◽  
X. H. Deng ◽  
Y. V. Khotyaintsev ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Guide Field

Vlasov-Fokker-Planck Simulations for High-Power Laser-Plasma Interactions

2012 ◽  
Vol 11 (4) ◽  
pp. 1236-1260 ◽  
Author(s):  
Su-Ming Weng ◽  
Zheng-Ming Sheng ◽  
Hui Xu ◽  
Jie Zhang
Keyword(s):  
High Power ◽  
Laser Plasma ◽  
Electron Distribution ◽  
Particle Number ◽  
High Power Laser ◽  
Power Laser ◽  
Simulation Code ◽  
Plasma Interactions ◽  
Laser Plasma Interactions ◽  
Particle Number Conservation

AbstractA review is presented on our recent Vlasov-Fokker-Planck (VFP) simulation code development and applications for high-power laser-plasma interactions. Numerical schemes are described for solving the kinetic VFP equation with both electron-electron and electron-ion collisions in one-spatial and two-velocity (1D2V) coordinates. They are based on the positive and flux conservation method and the finite volume method, and these two methods can insure the particle number conservation. Our simulation code can deal with problems in high-power laser/beam-plasma interactions, where highly non-Maxwellian electron distribution functions usually develop and the widely-used perturbation theories with the weak anisotropy assumption of the electron distribution function are no longer in point. We present some new results on three typical problems: firstly the plasma current generation in strong direct current electric fields beyond Spitzer-Härm’s transport theory, secondly the inverse bremsstrahlung absorption at high laser intensity beyond Langdon’s theory, and thirdly the heat transport with steep temperature and/or density gradients in laser-produced plasma. Finally, numerical parameters, performance, the particle number conservation, and the energy conservation in these simulations are provided.

Laser Ablation of Ti-Al Alloy in Vacuum and Air Environments

2012 ◽  
Vol 217-219 ◽  
pp. 2257-2264 ◽  
Author(s):  
Yue Hua Liu ◽  
Xiang Dong Liu ◽  
Ming Chen ◽  
Ming Wen Zhao
Keyword(s):  
High Power ◽  
Laser Energy ◽  
Optical Emission ◽  
Target Surface ◽  
Al Alloy ◽  
Laser Irradiance ◽  
Air Plasma ◽  
High Power Laser ◽  
Power Laser ◽  
Plasma Parameters

The time-resolved optical emission spectroscopy of Ti-Al alloy plasma produced by the Nd:YAG high-power laser pulses with wavelength of 1064nm was investigated both in air and vacuum conditions. The comparative studies gave detailed insights that the plasmas produced in air were much hotter and denser. The quantitative descriptions indeed suggested that a cascade avalanche process would be happen followed by air plasma firstly, before the laser impacting the target surface. On the other hand, the laser energy may be considerably attenuated via hotter and denser plasma, the amount of laser energy on the target surface remarkably decreased in air condition. In addition, at high-power laser irradiance levels, there was an auto regulatory area near the target surface and the plasma parameters tend to be saturated

scholarly journals Innovative Education and Training in high power laser plasmas (PowerLaPs) for plasma physics, high power laser–matter interactions and high energy density physics – theory and experiments

2019 ◽  
Vol 7 ◽  
Author(s):  
John Pasley ◽  
Georgia Andrianaki ◽  
Andreas Baroutsos ◽  
Dimitri Batani ◽  
Emmanouil P. Benis ◽  
...  
Keyword(s):  
Energy Density ◽  
Plasma Physics ◽  
High Power ◽  
High Energy ◽  
High Energy Density ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Plasmas ◽  
The University ◽  
And Training

The Erasmus Plus programme ‘Innovative Education and Training in high power laser plasmas’, otherwise known as PowerLaPs, is described. The PowerLaPs programme employs an innovative paradigm in that it is a multi-centre programme where teaching takes place in five separate institutes with a range of different aims and styles of delivery. The ‘in class’ time is limited to four weeks a year, and the programme spans two years. PowerLaPs aims to train students from across Europe in theoretical, applied and laboratory skills relevant to the pursuit of research in laser–plasma interaction physics and inertial confinement fusion (ICF). Lectures are intermingled with laboratory sessions and continuous assessment activities. The programme, which is led by workers from the Technological Educational Institute (TEI) of Crete, and supported by co-workers from the Queen’s University Belfast, the University of Bordeaux, the Czech Technical University in Prague, Ecole Polytechnique, the University of Ioannina, the University of Salamanca and the University of York, has just completed its first year. Thus far three Learning Teaching Training (LTT) activities have been held, at the Queen’s University Belfast, the University of Bordeaux and the Centre for Plasma Physics and Lasers (CPPL) of TEI Crete. The last of these was a two-week long Intensive Programme (IP), while the activities at the other two universities were each five days in length. Thus far work has concentrated upon training in both theoretical and experimental work in plasma physics, high power laser–matter interactions and high energy density physics. The nature of the programme will be described in detail and some metrics relating to the activities carried out to date will be presented.

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