Laser-plasma energy transport with high-intensity short laser pulses

1990 ◽  
Author(s):  
Gregory J. Tallents ◽  
Michael H. Key ◽  
Peter A. Norreys ◽  
N. Tragin ◽  
Hector A. Baldis ◽  
...  
Keyword(s):  
Laser Plasma ◽  
High Intensity ◽  
Energy Transport ◽  
Laser Pulses ◽  
Plasma Energy ◽  
Short Laser Pulses

scholarly journals DEVELOPMENT OF ULTRA-SHORT HIGH INTENSITY LASERS FOR THE VISIBLE SPECTRA RANGE

2020 ◽  
Vol 17 (35) ◽  
pp. 739-752
Author(s):  
Hayder J. ABDULRAHMAN ◽  
Suzan B. MOHAMMED
Keyword(s):  
High Intensity ◽  
Laser Processing ◽  
Near Infrared ◽  
Laser Pulses ◽  
Dielectric Materials ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Visible Spectra ◽  
Short Laser Pulses ◽  
Micro Tools

Ultra-short laser pulses are particularly suitable for processing micro tools made of ultra-hard and dielectric materials. Ultra-short laser pulses provide a contact-free and precise fabrication of heat-sensitive materials such as visible spectra range. Visible spectra range has unique properties, which makes it an essential material in the tool, jewelry, and semiconductor industries. The processing of visible spectra range by ultra-short laser pulses is complex, as visible and near-infrared light is generally not absorbed. However, the intensity of ultra-short laser pulses is extremely high, so that the absorption scales nonlinearly with the intensity and, thus, visible or near-infrared light can be absorbed. The complexity also results from many partially interdependent process variables, such as the repetition rate, pulse overlap, track overlap, and scan speed. Excellent knowledge of the process is, therefore, essential for the production of micro tools. To make the laser processing accessible to a broader user field, the operator can be supported by a computer-aided design (CAD). The aim of this research was to the modeling of an ultra-short high-intensity laser for the visible spectra range in different environments of the angle of incidence, scanning speed, pulse, and track overlap. The experimental process included ultra-short pulsed laser processing of visible spectra range and surface analysis concerning modifications and ablation of the ultra-short laser. Ablation volumes were analyzed for single pulses, multi-pulses, and pockets. Pump-probe experiments reveal transient optical properties such as transmission or reflectivity. It was concluded that ultraviolet laser pulses are best suited to induce damage or modifications to visible spectra range surfaces. Additionally, shorter wavelengths have further advantages such as potentially longer Rayleigh lengths and smaller spot sizes.

scholarly journals Transport of hot electron currents in solid targets irradiated by high intensity short laser pulses

2010 ◽  
Vol 244 (2) ◽  
pp. 022016 ◽  
Author(s):  
P Antici ◽  
P Audebert ◽  
M Borghesi ◽  
T Cowan ◽  
L Gremillet ◽  
...  
Keyword(s):  
High Intensity ◽  
Laser Pulses ◽  
Hot Electron ◽  
Short Laser Pulses

scholarly journals Simulation of a high-brightness, hard X-ray source based on high-intensity interaction of ultra-short laser pulses with high-Z targets

1997 ◽  
Vol 15 (1) ◽  
pp. 139-143
Author(s):  
V.A. Lykov ◽  
V.E. Chernyakov ◽  
Ya.Z. Kandiev ◽  
I.A. Litvinenko ◽  
V.G. Nikolaev
Keyword(s):  
Angular Distribution ◽  
Numerical Simulations ◽  
Electromagnetic Fields ◽  
High Intensity ◽  
Laser Pulses ◽  
The State ◽  
High Brightness ◽  
Fast Electrons ◽  
X Ray ◽  
Short Laser Pulses

The results of numerical simulations of fast electrons interaction with matter, calculated yield and angular distribution of bremsstrahlung and fluorescence K-α X-ray radiation and generation of electromagnetic fields, carried out by ERA, PM2D, and PRIZMA codes for the state of experiments on interaction of ultra-short laser pulses with high-Z targets at intensity of 1016−1018 W/cm2 are presented. Spherical targets with conical hollows and conical targets of high-Z matter are proposed for experiments with picosecond lasers to increase the brightness of hard X-ray sources.

Quasi-matched propagation of high-intensity, ultra-short laser pulses in plasma channels

2013 ◽  
Author(s):  
C. Benedetti ◽  
C. B. Schroeder ◽  
E. Esarey ◽  
W. P. Leemans
Keyword(s):  
High Intensity ◽  
Laser Pulses ◽  
Plasma Channels ◽  
Short Laser Pulses

scholarly journals Electron and proton beams produced by ultra short laser pulses in the relativistic regime

2004 ◽  
Vol 22 (4) ◽  
pp. 399-405 ◽  
Author(s):  
V. MALKA ◽  
S. FRITZLER
Keyword(s):  
Charged Particle ◽  
Laser Plasma ◽  
State Of The Art ◽  
Laser Pulses ◽  
Plasma Interactions ◽  
Laser Plasma Interactions ◽  
Current State ◽  
Relativistic Regime ◽  
Short Laser Pulses ◽  
Plasma Background

It is known that relativistic laser plasma interactions can already today induce accelerating fields beyond some TV/m, which are indeed capable to efficiently accelerate plasma background electrons as well as protons. An introduction to the current state of the art will be given and possible applications of these optically induced charged particle sources will be discussed.

scholarly journals Propagation issues and energetic particle production in laser–plasma interactions at intensities exceeding 1019 W/cm2

2002 ◽  
Vol 20 (1) ◽  
pp. 31-38 ◽  
Author(s):  
M. BORGHESI ◽  
D.H. CAMPBELL ◽  
A. SCHIAVI ◽  
O. WILLI ◽  
M. GALIMBERTI ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Particle Production ◽  
Energy Transport ◽  
Laser Energy ◽  
Dense Matter ◽  
Laser Pulses ◽  
Laser Plasma Interaction ◽  
Laser Plasma Interactions ◽  
Underdense Plasmas ◽  
Series Of Experiments

A series of experiments recently carried out at the Rutherford Appleton Laboratory investigated various aspects of the laser–plasma interaction in the relativistic intensity regime. The propagation of laser pulses through preformed plasmas was studied at intensities exceeding 1019 W/cm2. The transmission of laser energy through long-scale underdense plasmas showed to be inefficient unless a plasma channel is preformed ahead of the main laser pulse. The study of the interaction with overdense plasmas yielded indication of collimated energy transport through the plasma. The production of fast particles during the interaction with solid density targets was also investigated. The measurements revealed the presence of a small-sized directional source of multi-megaelectron volt protons, which was not observed when a plasma was preformed at the back of the solid target. The properties of the source are promising in view of its use in radiographic imaging of dense matter, and preliminary tests were carried out.

Fluoride crystals growth and color center production by high intensity ultra short laser pulses

2007 ◽  
Vol 4 (3) ◽  
pp. 1060-1065 ◽  
Author(s):  
S. L. Baldochi ◽  
L. C. Courrol ◽  
R. E. Samad ◽  
I. M. Ranieri ◽  
L. Gomes ◽  
...  
Keyword(s):  
Color Center ◽  
High Intensity ◽  
Laser Pulses ◽  
Short Laser Pulses ◽  
Fluoride Crystals

Efficient coupling of high intensity short laser pulses into snow clusters

2007 ◽  
Vol 90 (4) ◽  
pp. 041501 ◽  
Author(s):  
T. Palchan ◽  
S. Pecker ◽  
Z. Henis ◽  
S. Eisenmann ◽  
A. Zigler
Keyword(s):  
High Intensity ◽  
Laser Pulses ◽  
Short Laser Pulses ◽  
Efficient Coupling
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