Activation of the Fuels with Low Reactivity Using the High-Power Laser Pulses

In this paper we have proposed the simple and effective approach to activation of the low reactivity industrial fuel which can be used immediately inside the furnace. The high-power laser pulses initiates partial gasification of the fuel together with its ultra-fine atomization. The gas-aerosol cloud surrounding the initial coal-water slurry droplet can consist of approximately 10% (after absorption of hundred pulses) of the initial droplet weight. The ratio of the syngas and aerosol weights is like 1:2 when pulse intensity is higher than 8 J/cm 2 . The size and velocity distributions of the ultra-fine aerosol particles were analysed using the original realization of the particle tracking velocimetry technique.

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Possibility of eddy currents and spontaneous magnetic fields observations in plasma formed through the interaction of high-power laser pulses with porous targets

Mathematical Models and Computer Simulations ◽

10.1134/s2070048210030099 ◽

2010 ◽

Vol 2 (3) ◽

pp. 359-361 ◽

Cited By ~ 1

Author(s):

A. I. Lebo ◽

I. G. Lebo

Keyword(s):

Magnetic Fields ◽

High Power ◽

Eddy Currents ◽

Laser Pulses ◽

High Power Laser ◽

Power Laser

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Characterisation of supersonic gas jets for different nozzle geometries for laser-plasma acceleration experiments at SPARC_LAB

Journal of Instrumentation ◽

10.1088/1748-0221/17/01/c01049 ◽

2022 ◽

Vol 17 (01) ◽

pp. C01049

Author(s):

G. Costa ◽

M.P. Anania ◽

A. Biagioni ◽

F.G. Bisesto ◽

M. Del Franco ◽

...

Keyword(s):

High Power ◽

Plasma Channel ◽

Laser Pulses ◽

Industrial Applications ◽

Point Of View ◽

Theoretical Point ◽

High Power Laser ◽

Power Laser ◽

Neutral Gas ◽

Nozzle Geometries

Abstract Plasma-based technology promises a tremendous reduction in size of accelerators used for research, medical, and industrial applications, making it possible to develop tabletop machines accessible for a broader scientific community. The use of high-power laser pulses on gaseous targets is a promising method for the generation of accelerated electron beams at energies on the GeV scale, in extremely small sizes, typically millimetres. The gaseous target in question can be a collimated supersonic gasjet from a nozzle. In this work, a technique for optimising the so generated plasma channel is presented. In detail, a study on the influence of the nozzle throat shape in relation to the uniformity and density of the generated plasma profile is reported. These considerations are discussed first of all from a theoretical point of view, by means of a stationary one-dimensional mathematical model of the neutral gas, thus exploiting the possibility of comparing the properties of the output flow for different nozzle geometries. This is combined with an experimental approach using interferometric longitudinal density measurements of the plasma channel. The latter is generated by a high-power laser pulse focused on a helium gasjet, in the SPARC_LAB laboratories.

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