scholarly journals Dynamics of laser-generated magnetic fields using long laser pulses

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Hiroki Morita ◽  
Bradley B. Pollock ◽  
Clement S. Goyon ◽  
Gerald J. Williams ◽  
King Fai Farley Law ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Laser Pulses

Ion acceleration by multiple laser pulses and their spontaneous electromagnetic fields in plasma

2008 ◽  
Vol 74 (1) ◽  
pp. 111-118
Author(s):  
FEN-CE CHEN
Keyword(s):  
Magnetic Fields ◽  
Electric Field ◽  
Analytical Model ◽  
Electromagnetic Fields ◽  
Equations Of Motion ◽  
Charged Particles ◽  
Laser Pulses ◽  
The Self ◽  
Electric And Magnetic Fields ◽  
Relativistic Equations

AbstractThe acceleration of ions by multiple laser pulses and their spontaneously generated electric and magnetic fields is investigated by using an analytical model for the latter. The relativistic equations of motion of test charged particles are solved numerically. It is found that the self-generated axial electric field plays an important role in the acceleration, and the energy of heavy test ions can reach several gigaelectronvolts.

scholarly journals Generation of megatesla magnetic fields by intense-laser-driven microtube implosions

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
M. Murakami ◽  
J. J. Honrubia ◽  
K. Weichman ◽  
A. V. Arefiev ◽  
S. V. Bulanov
Keyword(s):  
Magnetic Fields ◽  
Collective Motion ◽  
Spin Current ◽  
Laser Pulses ◽  
Central Axis ◽  
Intense Laser ◽  
Fundamental Physics ◽  
Ultrahigh Magnetic Fields ◽  
Particle Simulations ◽  
Current Densities

Abstract A microtube implosion driven by ultraintense laser pulses is used to produce ultrahigh magnetic fields. Due to the laser-produced hot electrons with energies of mega-electron volts, cold ions in the inner wall surface implode towards the central axis. By pre-seeding uniform magnetic fields on the kilotesla order, the Lorenz force induces the Larmor gyromotion of the imploding ions and electrons. Due to the resultant collective motion of relativistic charged particles around the central axis, strong spin current densities of $$\sim$$ ∼ peta-ampere/$$\hbox {cm}^{2}$$ cm 2 are produced with a few tens of nm size, generating megatesla-order magnetic fields. The underlying physics and important scaling are revealed by particle simulations and a simple analytical model. The concept holds promise to open new frontiers in many branches of fundamental physics and applications in terms of ultrahigh magnetic fields.

Strong magnetic fields generated with a simple open-ended coil irradiated by high power laser pulses

2015 ◽  
Vol 107 (26) ◽  
pp. 261903 ◽  
Author(s):  
B. J. Zhu ◽  
Y. T. Li ◽  
D. W. Yuan ◽  
Y. F. Li ◽  
F. Li ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Power ◽  
Laser Pulses ◽  
High Power Laser ◽  
Power Laser ◽  
Strong Magnetic Fields

scholarly journals Non-local terahertz photoconductivity in the topological phase of Hg1−xCdxTe

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
A. S. Kazakov ◽  
A. V. Galeeva ◽  
A. I. Artamkin ◽  
A. V. Ikonnikov ◽  
L. I. Ryabova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Laser Pulses ◽  
Zero Magnetic Field ◽  
Zero Field ◽  
Topological Phase ◽  
Non Local ◽  
Dark Signal ◽  
The Magnetic Field

AbstractWe report on observation of strong non-local photoconducitivity induced by terahertz laser pulses in non-zero magnetic field in heterostructures based on Hg1−xCdxTe films being in the topological phase. While the zero-field non-local photoconductivity is negligible, it is strongly enhanced in magnetic fields ~ 0.05 T resulting in appearance of an edge photocurrent that exceeds the respective dark signal by orders of magnitude. This photocurrent is chiral, and the chirality changes every time the magnetic field or the electric bias is reversed. Appearance of the non-local terahertz photoconductivity is attributed to features of the interface between the topological film and the trivial buffer.

scholarly journals Effects of self-generated electric and magnetic fields in laser-generated fast electron propagation in solid materials: Electric inhibition and beam pinching

2001 ◽  
Vol 19 (1) ◽  
pp. 59-65 ◽  
Author(s):  
A. BERNARDINELLO ◽  
D. BATANI ◽  
A. ANTONICCI ◽  
F. PISANI ◽  
M. KOENIG ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Laser Pulses ◽  
Intense Laser ◽  
Relativistic Electrons ◽  
Speed Of Light ◽  
Solid Materials ◽  
Strong Magnetic Fields ◽  
Intense Laser Pulses ◽  
Electric And Magnetic Fields ◽  
Electron Propagation

We present some experimental results which demonstrate the presence of electric inhibition in the propagation of relativistic electrons generated by intense laser pulses, depending on target conductivity. The use of transparent targets and shadowgraphic techniques has made it possible to evidence electron jets moving at the speed of light, an indication of the presence of self-generated strong magnetic fields.

scholarly journals Weibel instability by ultraintense laser pulses

1999 ◽  
Vol 17 (3) ◽  
pp. 515-518 ◽  
Author(s):  
T. OKADA ◽  
I. SAJIKI ◽  
K. SATOU
Keyword(s):  
Magnetic Fields ◽  
Velocity Distribution ◽  
Electromagnetic Waves ◽  
Laser Pulses ◽  
Electron Velocity ◽  
Electron Velocity Distribution ◽  
Loss Mechanism ◽  
Weibel Instability ◽  
Particle In Cell ◽  
Underdense Plasmas

Particle-in-cell (PIC) simulations show that an anisotropic electron velocity distribution is demonstrated by ultraintense laser pulses in underdense plasmas. Recently, it is reported that the anisotropy has been experimentally demonstrated in laser-produced plasmas. It is also pointed out that gigagauss magnetic fields are generated by ultraintense laser pulses. We have already published that the Weibel-type electromagnetic instabilities can be theoretically excited by electrons in a velocity distribution with anisotropic temperature. If these electromagnetic waves are excited, the target may have a possibility not only to give rise to a new type of energy loss mechanism but also to influence the implosion characteristics. In this work, we present PIC simulation of the interaction of ultraintense laser pulses with plasmas. Intense self-generated magnetic fields is produced by the mechanism of Weibel instability in underdense plasmas.

Physical processes in the channel of propagation of CO2 laser pulses during the generation of electric and magnetic fields

2021 ◽  
pp. 85-91
Author(s):  
S.F. Balandin ◽  
◽  
V.A. Donchenko ◽  
V.F. Myshkin ◽  
V.A. Khan ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Co2 Laser ◽  
Laser Pulses ◽  
Physical Processes ◽  
Radiation Propagation ◽  
Electric And Magnetic Fields ◽  
Modes Of Interaction ◽  
Long Paths

The mechanisms of generation of electric and magnetic fields during the propagation of microsecond pulses of a CO2 laser in the atmosphere over long paths are considered. The range of radiated waves selected for research is substantiated. The power of the source required for the realization of the pre-breakdown and breakdown modes of interaction of radiation with the medium is estimated. The dependence of the observed signals on the conditions of radiation propagation is investigated. Comparison of theoretical estimates and results of outdoorexperiments is carried out.

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