Suprathermal energetic electrons and ions generation by an ultraintensive laser pulse in foil plasmas

2002 ◽  
Author(s):  
T. Okada ◽  
S. Toraya
Keyword(s):  
Laser Pulse ◽  
Energetic Electrons ◽  
Electrons And Ions

scholarly journals Parameters of a fast ion jet generated by an intense ultrashort laser pulse on an inhomogeneous plasma foil

2004 ◽  
Vol 22 (4) ◽  
pp. 431-438 ◽  
Author(s):  
A.A. ANDREEV ◽  
T. OKADA ◽  
K.Yu. PLATONOV ◽  
S. TORAYA
Keyword(s):  
Laser Pulse ◽  
Plasma Density ◽  
Laser Energy ◽  
Ion Beam ◽  
Inhomogeneous Plasma ◽  
Ion Acceleration ◽  
Plasma Parameters ◽  
Electrons And Ions ◽  
Foil Target ◽  
Fast Ion

Analysis and simulations of fast particles produced by a high-intensity short laser pulse interacting with a foil target are performed. Initially, the plasma density distribution of the foil target has a smooth gradient with the scale length of plasma density varying across it. The absorbed laser energy is transferred to fast electrons, which penetrate in the foil and are partially ejected from the foil rear. These electrons produce an electric field that causes an ion beam to be emitted from the foil. We analyze the mechanism of ion acceleration in the foil plasma and the influence of the density gradient and other laser and plasma parameters on ion acceleration. The angular distributions of the ejected electrons and ions are calculated.

Energetic particles in solar flares: theory and diagnostics

1991 ◽  
Vol 336 (1643) ◽  
pp. 413-424 ◽  
Keyword(s):  
Solar Flares ◽  
Gamma Ray ◽  
Low Energy ◽  
Emission Data ◽  
Energetic Electrons ◽  
X Ray ◽  
Electrons And Ions ◽  
Low Energy Ions ◽  
Impact Polarization ◽  
Major Progress

Recent progress and future prospects in diagnostics of energetic electrons and ions in the flares are reviewed, together with the roles they play in the flare as a whole. Most of the discussion centres on hard X-ray and gamma-ray and thermal plasma emission data, rather than on radio sources. Since Solar Maximum Mission and Hinotori there has been major progress in all areas of flare electron diagnostics. Electron spectra are now recoverable with some precision, electrons with energies above 10 MeV are known to be highly anisotropic, and indications are available of the spatial distribution of electrons at 20 keV. Timescales of electron acceleration are now known to be shorter than 0.1 s. Energetic electrons are believed to carry much of the flare power. Ion diagnostics are more limited. For greater than 1 MeV ions the flux, spectrum and acceleration timescale are now quite well known. Low energy ions are hard to diagnose but have been invoked as a flare heating mechanism alternative to electron beams. The problems with beam heating models are discussed with special attention to the problems of the low energy proton model and its only direct diagnostic, Hα impact polarization. Finally, theoretical problems associated with return currents and with accelerator requirements are discussed and attention is drawn to the possible importance of entropy as well as energy considerations.

Energetic electron generation by magnetic reconnection in laboratory laser-plasma interactions

2012 ◽  
Vol 78 (4) ◽  
pp. 497-500 ◽  
Author(s):  
Q.-L. DONG ◽  
D.-W. YUAN ◽  
S.-J. WANG ◽  
Y. T. LI ◽  
X. LIU ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Magnetic Reconnection ◽  
Current Sheet ◽  
Laser Plasma ◽  
Energetic Electron ◽  
Energetic Electrons ◽  
Accelerated Electrons ◽  
Laser Plasma Interactions ◽  
Plasma Bubbles ◽  
Electron Generation

AbstractThe magnetic reconnection (MR) configuration was constructed by using two approaching laser-produced plasma bubbles. The characteristics of the MR current sheet were investigated. The driving energy of the laser pulse affects the type of the current sheet. The experiments present “Y-type” and “X-type” current sheets for larger and smaller driving energy, respectively. The energetic electrons were found to be well-collimated. The formation and ejection of plasmoid from the “Y-type” current sheet was expected to enhance the number of accelerated electrons.

Energetic electrons and ions in the magnetosheath at low and medium latitudes: Prognoz 10 data

1992 ◽  
Vol 97 (A10) ◽  
pp. 14849 ◽  
Author(s):  
K. Kudela ◽  
D. G. Sibeck ◽  
M. Slivka ◽  
S. Fischer ◽  
V. N. Lutsenko ◽  
...  
Keyword(s):  
Energetic Electrons ◽  
Electrons And Ions

Simultaneous observation of upward moving field-aligned energetic electrons and ions on auroral zone field lines

1988 ◽  
Vol 93 (A9) ◽  
pp. 9765 ◽  
Author(s):  
B. Hultqvist ◽  
R. Lundin ◽  
K. Stasiewicz ◽  
L. Block ◽  
P.-A. Lindqvist ◽  
...  
Keyword(s):  
Auroral Zone ◽  
Simultaneous Observation ◽  
Energetic Electrons ◽  
Electrons And Ions ◽  
Field Lines ◽  
Upward Moving ◽  
Zone Field

scholarly journals A compact design for velocity-map imaging of energetic electrons and ions

2017 ◽  
Vol 147 (1) ◽  
pp. 013942 ◽  
Author(s):  
D. Schomas ◽  
N. Rendler ◽  
J. Krull ◽  
R. Richter ◽  
M. Mudrich
Keyword(s):  
Velocity Map Imaging ◽  
Energetic Electrons ◽  
Electrons And Ions ◽  
Compact Design
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