Structure of low-frequency fields generated by ponderomotive force arising at the interaction of ultrashort focused laser pulse with conductor

2021 ◽  
Author(s):  
Sergey Uryupin ◽  
Egor Danilov
Keyword(s):  
Laser Pulse ◽  
Ponderomotive Force ◽  
Low Frequency

The Effect of Ponderomotive Force of a Laser Pulse on the Frequency Shift of its X-mode Propagation

2011 ◽  
Author(s):  
L. Shahrassai ◽  
S. Sobhanian ◽  
H. Khosravi ◽  
Muhammed Hasan Aslan ◽  
Ahmet Yayuz Oral ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Frequency Shift ◽  
Ponderomotive Force ◽  
Mode Propagation

scholarly journals Relativistic acceleration of micro-foils with prospects for fast ignition

2012 ◽  
Vol 30 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Shalom Eliezer
Keyword(s):  
Cylindrical Shell ◽  
Laser Pulse ◽  
Heat Wave ◽  
Ponderomotive Force ◽  
Picosecond Laser ◽  
Fast Ignition ◽  
Solid Target ◽  
Time Duration ◽  
Short Time

AbstractIn this work, it is suggested that the ponderomotive force, induced by a multi-petawatt laser on the interface of a vacuum with solid target, can accelerate a micro-foil to relativistic velocities. The extremely high velocities of the micro-foil can be achieved due to the very short time duration (about a picosecond) of the laser pulse. This accelerated micro-foil is used to ignite a pre-compressed cylindrical shell containing the deuterium tritium fuel. The fast ignition is induced by a heat wave produced during the collision of the accelerated foil with the pre-compressed target. This approach has the advantage of separating geometrically the nanoseconds lasers that compress the target with the picosecond laser that accelerates the foil.

Guided acceleration of nanoparticles by laser irradiated parallel gold nanorods

2021 ◽  
Author(s):  
Mamta Yadav ◽  
Ashok Kumar ◽  
Subhayan Mandal
Keyword(s):  
Laser Pulse ◽  
Electric Field ◽  
Pulse Duration ◽  
Gold Nanorods ◽  
Ponderomotive Force ◽  
Transverse Component ◽  
High State ◽  
Free Electrons ◽  
Axial Field ◽  
Axis Of Symmetry

Abstract Laser irradiated parallel gold nanorods with interspersed deuterium nanoparticles are shown to offer guided acceleration of nanoparticles. The laser pulse of intensity exceeding 1018W/cm2 at 1 μm wavelength and pulse duration ~30 fs causes full ionization of nanoparticles and high state ionization of gold atoms and pushes out the free electrons via the ponderomotive force. The charged nanorods have an electric field that has transverse component towards the axis of symmetry and axial field outwards. Thus the nanoparticles are accelerated axially while confined transversely. Deuterium beam of a few MeV energy can be produced by this technique.

scholarly journals Effect of thermal pressure on upward plasma fluxes due to ponderomotive force of Alfvén waves

2011 ◽  
Vol 18 (2) ◽  
pp. 235-241 ◽  
Author(s):  
A. K. Nekrasov ◽  
F. Z. Feygin
Keyword(s):  
Magnetic Moment ◽  
Ponderomotive Force ◽  
Standing Waves ◽  
Low Frequency ◽  
Alfven Waves ◽  
Background Plasma ◽  
Alfvén Waves ◽  
Thermal Pressure ◽  
Plasma Displacement

Abstract. We consider the action of the ponderomotive force of low-frequency Alfvén waves on the distribution of the background plasma. It is assumed that the ponderomotive force for traveling waves arises as a result of the background inhomogeneity of medium under study. Expressions for the ponderomotive force obtained in this paper differ from previous analogous results. The induced magnetic moment of medium is taken into account. It is shown that the well-known Pitayevsky's formula for the magnetic moment is not complete. The role of the induced nonlinear thermal pressure in the evolution of the background plasma is considered. We give estimations for plasma displacement due to the long- and short-acting nonlinear wave perturbations. Some discussion of the ponderomotive action of standing waves is provided.

scholarly journals Improvement of ion acceleration in radiation pressure acceleration regime by using an external strong magnetic field

2019 ◽  
Vol 37 (2) ◽  
pp. 217-222 ◽  
Author(s):  
H. Cheng ◽  
L. H. Cao ◽  
J. X. Gong ◽  
R. Xie ◽  
C. Y. Zheng ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Radiation Pressure ◽  
Longitudinal Magnetic Field ◽  
Ponderomotive Force ◽  
Two Dimensional ◽  
Particle In Cell ◽  
Combined Action ◽  
The Magnetic Field

AbstractTwo-dimensional particle-in-cell (PIC) simulations have been used to investigate the interaction between a laser pulse and a foil exposed to an external strong longitudinal magnetic field. Compared with that in the absence of the external magnetic field, the divergence of proton with the magnetic field in radiation pressure acceleration (RPA) regimes has improved remarkably due to the restriction of the electron transverse expansion. During the RPA process, the foil develops into a typical bubble-like shape resulting from the combined action of transversal ponderomotive force and instabilities. However, the foil prefers to be in a cone-like shape by using the magnetic field. The dependence of proton divergence on the strength of magnetic field has been studied, and an optimal magnetic field of nearly 60 kT is achieved in these simulations.

Stabilization of collisional drift waves by kinetic Alfvén waves

1992 ◽  
Vol 47 (2) ◽  
pp. 249-260
Author(s):  
C. Kar ◽  
S. K. Majumdar ◽  
A. N. Sekar Iyengar
Keyword(s):  
Mode Coupling ◽  
Ponderomotive Force ◽  
Low Frequency ◽  
Alfven Waves ◽  
Alfven Wave ◽  
Alfvén Waves ◽  
Drift Waves ◽  
Coupling Mechanism ◽  
Plasma Parameters ◽  
Kinetic Alfvén Waves

We have investigated a mode-coupling mechanism between kinetic Alfvén waves and a collisional drift wave in an inhomogeneous cylindrical plasma. Drift waves satisfying the condition k⊥D > 1/r0 (where r0 is the radius of the plasma cylinder) are stabilized by the low-frequency ponderomotive force generated by the kinetic Alfvén waves. For typical plasma parameters and a moderate level of Alfven-wave intensity the stabilization factor is comparable to the destabilization mechanism due to collisions.

Nonlinear interaction of electrostatic ion-cyclotron and drift waves in plasmas

1996 ◽  
Vol 56 (1) ◽  
pp. 187-191 ◽  
Author(s):  
O. A. Pokhotelov ◽  
L. Stenflo ◽  
P. K. Shukla
Keyword(s):  
Nonlinear Interaction ◽  
Ponderomotive Force ◽  
Modulational Instability ◽  
Low Frequency ◽  
Drift Waves ◽  
Nonlinear Coupling ◽  
Constant Amplitude ◽  
Ion Cyclotron Waves ◽  
Ion Cyclotron ◽  
Model Equations

Model equations describing the nonlinear coupling between electrostatic ion-cyclotron and drift waves are derived, taking into account the action of the low-frequency ponderomotive force associated with the ion-cyclotron waves. It is found that this interaction is governed by a pair of equations, which can be used for studying the modulational instability of a constant amplitude ion-cyclotron wave as well as the dynamics of nonlinearly coupled ion-cyclotron and drift waves.

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