Evolution of chirped laser pulses in a magnetized plasma channel

2014 ◽  
Vol 21 (12) ◽  
pp. 123106 ◽  
Author(s):  
Pallavi Jha ◽  
Hemlata ◽  
Rohit Kumar Mishra
Keyword(s):  
Plasma Channel ◽  
Laser Pulses ◽  
Magnetized Plasma

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

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.

Effect of transverse ponderomotive nonlinearity on the propagation of ultrashort laser pulses in a plasma channel

2008 ◽  
Vol 15 (12) ◽  
pp. 124503 ◽  
Author(s):  
Ajay K. Upadhyay ◽  
Ram Gopal Singh ◽  
Vijay Singh ◽  
Pallavi Jha
Keyword(s):  
Plasma Channel ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ponderomotive Nonlinearity ◽  
Ultrashort Laser

Interaction of ultraintense laser pulses with an underdense, preformed plasma channel

2000 ◽  
Vol 28 (4) ◽  
pp. 1078-1083 ◽  
Author(s):  
V. Malka ◽  
J. Faure ◽  
J.R. Marques ◽  
F. Amiranoff ◽  
C. Courtois ◽  
...  
Keyword(s):  
Plasma Channel ◽  
Laser Pulses ◽  
Preformed Plasma

Tunable and efficient terahertz radiation generation by photomixing of two super Gaussian laser pulses in a corrugated magnetized plasma

2015 ◽  
Vol 117 (19) ◽  
pp. 193303 ◽  
Author(s):  
Prateek Varshney ◽  
Vivek Sajal ◽  
Kunwar Pal Singh ◽  
Ravindra Kumar ◽  
Navneet K. Sharma
Keyword(s):  
Terahertz Radiation ◽  
Laser Pulses ◽  
Magnetized Plasma ◽  
Radiation Generation

Nonlinear theory of propagation of intense laser pulses in magnetized plasma

2002 ◽  
Vol 9 (1) ◽  
pp. 263-266 ◽  
Author(s):  
Navina Wadhwani ◽  
Punit Kumar ◽  
Pallavi Jha
Keyword(s):  
Nonlinear Theory ◽  
Laser Pulses ◽  
Magnetized Plasma ◽  
Intense Laser ◽  
Intense Laser Pulses

scholarly journals Stimulated Raman forward scattering of laser in a pre-formed plasma channel

2012 ◽  
Vol 30 (4) ◽  
pp. 605-611 ◽  
Author(s):  
Anuraj Panwar ◽  
Ashok Kumar ◽  
C.M. Ryu
Keyword(s):  
Growth Rate ◽  
Laser Pulse ◽  
Plasma Wave ◽  
Plasma Channel ◽  
Short Pulse ◽  
Density Perturbation ◽  
Laser Pulses ◽  
Forward Scattering ◽  
Short Pulse Laser ◽  
Stimulated Raman

AbstractStimulated Raman forward scattering (SRFS) of an intense short pulse laser in a plasma channel formed by two pre-laser pulses is investigated. The density nonuniformity of a plasma channel increases the focusing of main laser pulse. Main laser pulse excites a plasma wave and two electromagnetic sideband waves. Laser and the sidebands exert an axial ponderomotive force on electrons driving the plasma wave. The nonlinear currents arise at sideband frequencies. The density perturbation due to plasma wave beats with the oscillatory velocity due to pump to drive the sidebands. The normalized growth rate of SRFS increases with the density nonuniformity of a plasma channel. However, in the presence of a deep plasma channel the focusing is ineffective to laser intensity, but the growth rate increases with the intensity of main laser pulse.

Self-focusing and channel-coupling effects on short laser pulses propagating in a plasma channel

2004 ◽  
Vol 11 (6) ◽  
pp. 3259-3263 ◽  
Author(s):  
Pallavi Jha ◽  
Navina Wadhwani ◽  
Ajay. K. Upadhyaya ◽  
Gaurav Raj
Keyword(s):  
Plasma Channel ◽  
Laser Pulses ◽  
Coupling Effects ◽  
Channel Coupling ◽  
Self Focusing ◽  
Short Laser Pulses

scholarly journals Ionization-induced leaking-mode channeling of intense short laser pulses in gases

1999 ◽  
Vol 17 (1) ◽  
pp. 129-138 ◽  
Author(s):  
A.M. SERGEEV ◽  
M. LONTANO ◽  
A.V. KIM ◽  
V.B. GILDENBURG ◽  
M.D. CHERNOBROVTSEVA ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Plasma Channel ◽  
Computational Study ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Short Laser Pulse ◽  
Saturation Regime ◽  
Short Laser Pulses ◽  
Ultrashort Laser ◽  
Guiding Effect

We demonstrate that short laser pulse self-guiding over distances of many Rayleigh lengths can be achieved in the absence of any focusing nonlinearity as a result of trapping of a leaking wave in a plasma channel produced by field-induced ionization in the saturation regime. A detailed computational study of the new self-guiding effect in both cases of comparatively long laser pulses, when the traditional approximation of the slowly varying complex amplitude is valid, and of high intense ultrashort laser pulses comprising only few field cycles have been performed.

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