Accelerating and guiding of  C6+ by an intense laser irradiating on a foil target with a tapered channel

AbstractEnergetic electron beam generation from a thin foil target by the ponderomotive force of an ultra-intense circularly polarized laser pulse is investigated. Two-dimensional particle-in-cell (PIC) simulations show that laser pulses with intensity of 1022–1023 Wcm−2 generate about 1–10 GeV electron beams, in agreement with the prediction of one-dimensional theory. When the laser intensity is at 1024–1025 Wcm−2, the beam energy obtained from PIC simulations is lower than the values predicted by the theory. The radiation damping effect is considered, which is found to become important for the laser intensity higher than 1025 Wcm−2. The effect of laser focus positions is also discussed.

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Ultra-Intense Laser Pulse Absorption and Fast Particles Generation at Interaction with Inhomogeneous Foil Target

10.1063/1.1514303 ◽

2002 ◽

Author(s):

A. A. Andreev

Keyword(s):

Laser Pulse ◽

Intense Laser ◽

Intense Laser Pulse ◽

Foil Target

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Efficient generation of proton bunches by intense laser pulse with a double-slice-foil target

Journal of Plasma Physics ◽

10.1017/s0022377812000529 ◽

2012 ◽

Vol 78 (4) ◽

pp. 491-496

Author(s):

JUN ZHENG ◽

ZHENG-MING SHENG ◽

JIN-LU LIU ◽

WEI-MIN ZHOU ◽

HAN XU ◽

...

Keyword(s):

Double Layer ◽

Laser Pulses ◽

Intense Laser ◽

Particle In Cell ◽

Intense Laser Pulses ◽

Proton Beam Energy ◽

Direct Laser ◽

Laser Acceleration ◽

Foil Target ◽

Target Design

AbstractA double-slice-foil target is proposed for the generation of quasi-monoenergetic proton bunches by intense laser pulses. In this new target structure, two symmetrical solid slices are adjoined obliquely to the front side of a plane double-layer target. Two-dimensional particle-in-cell simulations show that a large number of hot electrons are pulled out from solid slices and accelerated forward by direct laser acceleration, which lead to significant enhancement of the sheath field and the produced proton beam energy as compared with the normal plane double-layer target and some other modified targets. It appears that well-collimated proton bunches with energy larger than 200 MeV can be produced at the focused laser intensity of about 1021W/cm2 with the proposed target design.

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Role of magnetic field evolution on filamentary structure formation in intense laser–foil interactions

High Power Laser Science and Engineering ◽

10.1017/hpl.2018.75 ◽

2019 ◽

Vol 7 ◽

Author(s):

M. King ◽

N. M. H. Butler ◽

R. Wilson ◽

R. Capdessus ◽

R. J. Gray ◽

...

Keyword(s):

Magnetic Field ◽

Rear Surface ◽

Target Volume ◽

Formation Time ◽

Intense Laser ◽

Experimental Investigations ◽

Filamentary Structure ◽

Foil Target ◽

Field Formation

Filamentary structures can form within the beam of protons accelerated during the interaction of an intense laser pulse with an ultrathin foil target. Such behaviour is shown to be dependent upon the formation time of quasi-static magnetic field structures throughout the target volume and the extent of the rear surface proton expansion over the same period. This is observed via both numerical and experimental investigations. By controlling the intensity profile of the laser drive, via the use of two temporally separated pulses, both the initial rear surface proton expansion and magnetic field formation time can be varied, resulting in modification to the degree of filamentary structure present within the laser-driven proton beam.

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