Physics of colliding laser pulses in underdense plasmas

2009 ◽  
Vol 10 (2-3) ◽  
pp. 148-158 ◽  
Author(s):  
Jérôme Faure ◽  
Clément Rechatin ◽  
Ahmed Ben-Ismail ◽  
Jaeku Lim ◽  
Xavier Davoine ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Underdense Plasmas

Relativistic self-focusing of ultraintense laser pulses in inhomogeneous underdense plasmas

1993 ◽  
Vol 47 (5) ◽  
pp. 3780-3783 ◽  
Author(s):  
H. S. Brandi ◽  
C. Manus ◽  
G. Mainfray ◽  
T. Lehner
Keyword(s):  
Laser Pulses ◽  
Self Focusing ◽  
Underdense Plasmas

scholarly journals Impulsive electric fields driven by high-intensity laser matter interactions

2007 ◽  
Vol 25 (1) ◽  
pp. 161-167 ◽  
Author(s):  
M. BORGHESI ◽  
S. KAR ◽  
L. ROMAGNANI ◽  
T. TONCIAN ◽  
P. ANTICI ◽  
...  
Keyword(s):  
Electric Fields ◽  
High Intensity ◽  
Ion Beam ◽  
Laser Pulses ◽  
Beam Focusing ◽  
High Intensity Laser ◽  
Underdense Plasmas ◽  
Sheath Formation ◽  
Metallic Foils ◽  
Intensity Laser

The interaction of high-intensity laser pulses with matter releases instantaneously ultra-large currents of highly energetic electrons, leading to the generation of highly-transient, large-amplitude electric and magnetic fields. We report results of recent experiments in which such charge dynamics have been studied by using proton probing techniques able to provide maps of the electrostatic fields with high spatial and temporal resolution. The dynamics of ponderomotive channeling in underdense plasmas have been studied in this way, as also the processes of Debye sheath formation and MeV ion front expansion at the rear of laser-irradiated thin metallic foils. Laser-driven impulsive fields at the surface of solid targets can be applied for energy-selective ion beam focusing.

scholarly journals Quasi-monoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas

2009 ◽  
Vol 11 (1) ◽  
pp. 013011 ◽  
Author(s):  
C Rechatin ◽  
J Faure ◽  
A Lifschitz ◽  
X Davoine ◽  
E Lefebvre ◽  
...  
Keyword(s):  
Electron Beams ◽  
Laser Pulses ◽  
Monoenergetic Electron ◽  
Underdense Plasmas

scholarly journals Diagnosis of peak laser intensity from high-energy ion measurements during intense laser interactions with underdense plasmas

2000 ◽  
Vol 18 (4) ◽  
pp. 595-600 ◽  
Author(s):  
K. KRUSHELNICK ◽  
E. CLARK ◽  
Z. NAJMUDIN ◽  
M. SALVATI ◽  
M.I.K. SANTALA ◽  
...  
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Intense Laser ◽  
Power Laser ◽  
Laser Propagation ◽  
Spatially Resolved ◽  
Ion Energies ◽  
Underdense Plasmas ◽  
Ion Emission ◽  
Helium Neon

Experiments were performed using high-power laser pulses (greater than 50 TW) focused into underdense helium, neon, or deuterium plasmas (ne ≤ 5 × 1019 cm−3). Ions having energies greater than 300 keV were measured to be produced primarily at 90° to the axis of laser propagation. Ion energies greater than 6 MeV were recorded from interactions with neon. Spatially resolved pinhole images of the ion emission were also obtained and were used to estimate the intensity of the focused radiation in the interaction region.

Chirping and spreading of ultrashort laser pulses in underdense plasmas

2004 ◽  
Vol 13 (6) ◽  
pp. 905-912
Author(s):  
Zhang Qiu-Ju ◽  
Sheng Zheng-Ming ◽  
Zhang Jie
Keyword(s):  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Underdense Plasmas ◽  
Ultrashort Laser

scholarly journals Weibel instability by ultraintense laser pulses

1999 ◽  
Vol 17 (3) ◽  
pp. 515-518 ◽  
Author(s):  
T. OKADA ◽  
I. SAJIKI ◽  
K. SATOU
Keyword(s):  
Magnetic Fields ◽  
Velocity Distribution ◽  
Electromagnetic Waves ◽  
Laser Pulses ◽  
Electron Velocity ◽  
Electron Velocity Distribution ◽  
Loss Mechanism ◽  
Weibel Instability ◽  
Particle In Cell ◽  
Underdense Plasmas

Particle-in-cell (PIC) simulations show that an anisotropic electron velocity distribution is demonstrated by ultraintense laser pulses in underdense plasmas. Recently, it is reported that the anisotropy has been experimentally demonstrated in laser-produced plasmas. It is also pointed out that gigagauss magnetic fields are generated by ultraintense laser pulses. We have already published that the Weibel-type electromagnetic instabilities can be theoretically excited by electrons in a velocity distribution with anisotropic temperature. If these electromagnetic waves are excited, the target may have a possibility not only to give rise to a new type of energy loss mechanism but also to influence the implosion characteristics. In this work, we present PIC simulation of the interaction of ultraintense laser pulses with plasmas. Intense self-generated magnetic fields is produced by the mechanism of Weibel instability in underdense plasmas.

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