scholarly journals Collimated quasi-monochromatic beams of accelerated electrons in the interaction of a weak-contrast intense femtosecond laser pulse with a metal foil

2013 ◽  
Vol 1 (2) ◽  
pp. 80-87 ◽  
Author(s):  
Yu.A. Malkov ◽  
A.N. Stepanov ◽  
D.A. Yashunin ◽  
L.P. Pugachev ◽  
P.R. Levashov ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Plasma Wave ◽  
Aluminum Foil ◽  
Metal Foil ◽  
Accelerated Electrons ◽  
Laser Plasma Interaction ◽  
Particle In Cell ◽  
Temporal Shape ◽  
Effective Excitation

AbstractWe demonstrated experimentally the formation of monoenergetic beams of accelerated electrons by focusing femtosecond laser radiation with an intensity of $2\times 1{0}^{17} ~\mathrm{W} / {\mathrm{cm} }^{2} $ onto the edge of an aluminum foil. The electrons had energy distributions peaking in the 0.2–0.8 MeV range with energy spread less than 20%. The acceleration mechanism related to the generation of a plasma wave as a result of self-modulation instability of a laser pulse in a dense plasma formed by a prepulse (arriving 12 ns before the main pulse) is considered. One-dimensional and two-dimensional Particle in Cell (PIC) simulations of the laser–plasma interaction showed that effective excitation of a plasma wave as well as trapping and acceleration of an electron beam with an energy on the order of 1 MeV may occur in the presence of sharp gradients in plasma density and in the temporal shape of the pulse.

scholarly journals Time-resolved study of holeboring in realistic experimental conditions

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
J. Hornung ◽  
Y. Zobus ◽  
S. Roeder ◽  
A. Kleinschmidt ◽  
D. Bertini ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Laser Plasma ◽  
Major Influence ◽  
Experimental Conditions ◽  
Time Resolved ◽  
Laser Plasma Interaction ◽  
Particle In Cell ◽  
Dense Plasmas ◽  
Laser Plasma Interactions ◽  
Overdense Plasma

AbstractThe evolution of dense plasmas prior to the arrival of the peak of the laser irradiation is critical to understanding relativistic laser plasma interactions. The spectral properties of a reflected laser pulse after the interaction with a plasma can be used to gain insights about the interaction itself, whereas the effect of holeboring has a predominant role. Here we developed an analytical model, describing the non-relativistic temporal evolution of the holeboring velocity in the presence of an arbitrary overdense plasma density and laser intensity profile. We verify this using two-dimensional particle-in-cell simulations, showing a major influence on the holeboring dynamic depending on the density profile. The influence on the reflected laser pulse has been verified during an experiment at the PHELIX laser. We show that this enables the possibility to determine the sub-micrometer scale length of the preplasma by measuring the maximum holeboring velocity and acceleration during the laser-plasma interaction.

scholarly journals PRODUCTION OF HOLOGRAMS THROUGH LASER- PLASMA INTERACTION WITH APPLICATIONS

2021 ◽  
Vol 9 (12) ◽  
pp. 227-231
Author(s):  
Deepak Tripathi ◽  
◽  
Aashi Srivastava ◽  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Laser Plasma ◽  
Review Paper ◽  
Tactile Display ◽  
Hand Tracking ◽  
Plasma Interaction ◽  
Laser Plasma Interaction

This review paper covers extensive research on the production of holograms through laser plasma interaction. The concept involves production of plasma trails through femtosecond laser pulse and capturing them through charged coupled device. This particular paper also revolves around the procedure and principle of Touchable holography. It lays emphasis on tactile display that is the primary requirement for touchable holography and also throws light on hand tracking and applications of the same.

Investigation of temporal evolution of picosecond laser pulse by synchronized femtosecond laser pulse

2018 ◽  
Vol 27 (01) ◽  
pp. 1850006
Author(s):  
Yangbao Deng ◽  
Shuguang Deng ◽  
Ye Tian ◽  
Guangfu Zhang ◽  
Cuixiu Xiong
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Temporal Evolution ◽  
Coupling Effect ◽  
Picosecond Laser ◽  
Picosecond Laser Pulse ◽  
Temporal Shape ◽  
Measurement Principle

In this paper, we theoretically and experimentally investigate the initial temporal characterization and the temporal evolution of a picosecond laser pulse by a synchronized femtosecond laser pulse. After theoretically analyzing the measurement principle, we experimentally measure the initial temporal characterization of the picosecond laser pulse. Further, the temporal evolution of the picosecond laser pulse propagating in different lengths of a carbon disulfide (CS2) is measured. We find that the initial temporal shape of the picosecond laser pulse is smooth and clean. As increasing of the CS2 length, the pulse width of the picosecond laser pulse has a trend of slight narrow owing to the spatiotemporal coupling effect.

scholarly journals Exploring novel target structures for manipulating relativistic laser–plasma interaction

2017 ◽  
Vol 5 ◽  
Author(s):  
Liangliang Ji ◽  
Sheng Jiang ◽  
Alexander Pukhov ◽  
Richard Freeman ◽  
Kramer Akli
Keyword(s):  
Laser Pulse ◽  
Laser Plasma ◽  
Contrast Ratio ◽  
Plasma Interaction ◽  
Laser Plasma Interaction ◽  
Particle In Cell ◽  
Nano Fabrication ◽  
Novel Target ◽  
Micro Structures ◽  
First Time

The improved laser-to-pedestal contrast ratio enabled by current high-power laser pulse cleaning techniques allows the fine features of the target survive before the main laser pulse arrives. We propose to introduce the nano-fabrication technologies into laser–plasma interaction to explore the novel effects of micro-structures. We found out that not only laser-driven particle sources but also the laser pulse itself can be manipulated by specifically designed micro-cylinder and -tube targets, respectively. The proposal was supported by full-3D particle-in-cell simulations and successful proof-of-principle experiments for the first time. We believe this would open a way to manipulate relativistic laser–plasma interaction at the micro-size level.

Thresholds for front-side ablation and rear-side spallation of metal foil irradiated by femtosecond laser pulse

2008 ◽  
Vol 92 (4) ◽  
pp. 797-801 ◽  
Author(s):  
S. I. Anisimov ◽  
N. A. Inogamov ◽  
Y. V. Petrov ◽  
V. A. Khokhlov ◽  
V. V. Zhakhovskii ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Rear Side ◽  
Metal Foil ◽  
Front Side

scholarly journals Femtosecond Laser Pulses: Generation, Measurement and Propagation

2021 ◽  
Author(s):  
Mounir Khelladi
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Ultrashort Laser Pulse ◽  
Short Pulse ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Light Pulses ◽  
Large Bandwidth ◽  
Temporal Shape ◽  
Ultrashort Laser

In this contribution some basic properties of femtosecond laser pulse are summarized. In sections 2.1–2.5 the generation of femtosecond laser pulses via mode locking is described in simple physical terms. In section 2.6 we deal with measurement of ultrashort laser pulses. The characterization of ultrashort pulses with respect to amplitude and phase is therefore based on optical correlation techniques that make of the short pulse itself. In section 3 we start with the linear properties of ultrashort light pulses. However, due to the large bandwidth, the linear dispersion is responsible for dramatic effects. To describe and manage such dispersion effects a mathematical description of an ultrashort laser pulse is given first before we continue with methods how to change the temporal shape via the frequency domain. The chapter ends with a paragraph of the wavelet representation of an ultrashort laser pulse.

scholarly journals Light-Tunable Ferromagnetism in Atomically Thin Fe3GeTe2 Driven by Femtosecond Laser Pulse

2020 ◽  
Vol 125 (26) ◽  
Author(s):  
Bo Liu ◽  
Shanshan Liu ◽  
Long Yang ◽  
Zhendong Chen ◽  
Enze Zhang ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse
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