Damping of Right-Hand Circularly Polarized Microwave through a Plasma with an Axial Magnetic Field

1970 ◽  
Vol 28 (2) ◽  
pp. 536-536
Author(s):  
Sadao Nakamura ◽  
Hiroshi Kubo ◽  
Kenji Mitani
Keyword(s):  
Magnetic Field ◽  
Axial Magnetic Field ◽  
Circularly Polarized ◽  
Right Hand

scholarly journals Effect of the axial magnetic field on coexisting stimulated Raman and Brillouin scattering of a circularly polarized beam

2016 ◽  
Vol 35 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Ashish Vyas ◽  
Swati Sharma ◽  
Ram Kishor Singh ◽  
R.P. Sharma
Keyword(s):  
Magnetic Field ◽  
Axial Magnetic Field ◽  
Brillouin Scattering ◽  
Wave Interaction ◽  
Scattering Process ◽  
Circularly Polarized ◽  
Polarized Beam ◽  
Stimulated Brillouin ◽  
The Impact ◽  
Stimulated Raman

AbstractThis paper presents a model to study the two prominent coexisting instabilities, stimulated Raman (SRS), and stimulated Brillouin scattering (SBS) in the presence of background axial magnetic field. In the context of laser-produced plasmas, this model is very useful in the situations where a self-generated axial magnetic field is present as well as where an external axial magnetic field is applied. Due to the interplay between both the scattering processes, the behavior of one scattering process is greatly modified in the presence of another coexisting scattering process. The impact of this coexisting phenomenon and axial magnetic field on the back reflectivity of scattered beams has been explored. It has been demonstrated that the back reflectivity gets modified significantly due to the coexistence of both the scattering processes (SRS and SBS) as well as due to the axial magnetic field. Results are also compared with the three-wave interaction case (isolated SRS or SBS case).

scholarly journals Inverse Faraday effect in a relativistic laser channel

2001 ◽  
Vol 19 (1) ◽  
pp. 133-136 ◽  
Author(s):  
I. KOSTYUKOV ◽  
G. SHVETS ◽  
N.J. FISCH ◽  
J.M. RAX
Keyword(s):  
Magnetic Field ◽  
Angular Momentum ◽  
Laser Radiation ◽  
Laser Pulse ◽  
Faraday Effect ◽  
Plasma Channel ◽  
Axial Magnetic Field ◽  
Absorbed Energy ◽  
Circularly Polarized ◽  
Inverse Faraday Effect

Interaction between energetic electrons and a circularly polarized laser pulse in a relativistic plasma channel is studied. Laser radiation can be resonantly absorbed by electrons executing betatron oscillations in the channel and absorbing angular momentum from the laser. The absorbed angular momentum manifests itself as a strong axial magnetic field (inverse Faraday effect). The magnitude of this magnetic field is calculated and related to the amount of the absorbed energy.

scholarly journals Collimated proton beams from magnetized near-critical plasmas

2018 ◽  
Vol 36 (3) ◽  
pp. 276-285 ◽  
Author(s):  
Deep Kumar Kuri ◽  
Nilakshi Das ◽  
Kartik Patel
Keyword(s):  
Magnetic Field ◽  
Proton Energy ◽  
Significant Contribution ◽  
Axial Magnetic Field ◽  
Three Dimensional ◽  
Proton Momentum ◽  
Proton Beams ◽  
Circularly Polarized ◽  
Particle In Cell ◽  
Linearly Polarized

AbstractGeneration of collimated proton beams by linearly and circularly polarized (CP) lasers from magnetized near-critical plasmas has been investigated with the help of three-dimensional (3D) particle-in-cell (PIC) simulations. Due to cyclotron effects, the transverse proton momentum gets significantly reduced in the presence of an axial magnetic field which leads to an enhancement in collimation. Collimation is observed to be highest in case of a linearly polarized (LP) laser in the presence of magnetic field. However, protons accelerated by a right CP laser in the presence of magnetic field are not only highly collimated but are also more energetic than those accelerated by the LP laser. Although, the presence of an axial magnetic field enhances the collimation by reducing the transverse proton momentum, the maximum proton energy gets reduced since the transverse proton momentum has a significant contribution towards proton energy.

The Position of a Type I Storm Source in the Magnetic Field of an Active Region

1973 ◽  
Vol 2 (4) ◽  
pp. 211-214 ◽  
Author(s):  
G. A. Dulk ◽  
G. J. Nelson
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Type I ◽  
Bipolar Structure ◽  
Circularly Polarized ◽  
One Dimensional ◽  
Left Hand ◽  
Right Hand ◽  
Sun Spots ◽  
The Magnetic Field

Type I storms generally occur in association with large sun-spots and the radiation is usually circularly polarized. Statistically it has been found that the sense of polarization, right-hand (RH) or left-hand (LH), usually corresponds to the ordinary magneto-ionic mode in the field of the dominant spot of the active region; when a following spot dominates, the polarization tends to be determined by this spot rather than by the leading field. One-dimensional position measurements show that the type I sources are usually not radially above the active region but are displaced by a few minutes of arc. The source sizes are about l′.2 to 4′.5 at 169 MHz and the sources frequently contain double, multiple or bipolar structure at 80 and 160 MHz.

scholarly journals Effect of super-thermal ions and electrons on the modulation instability of a circularly polarized laser pulse in magnetized plasma

2015 ◽  
Vol 33 (2) ◽  
pp. 265-272 ◽  
Author(s):  
R. Etemadpour ◽  
N. Sepehri Javan
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Laser Pulse ◽  
Modulation Instability ◽  
Fluid Model ◽  
Magnetized Plasma ◽  
Effect Of Temperature ◽  
Circularly Polarized ◽  
Relativistic Fluid ◽  
Right Hand

AbstractThe modulation instability of a circularly polarized laser pulse in a magnetized non-Maxwellian plasma is investigated. Based on a relativistic fluid model, the nonlinear interaction of an intense circularly polarized laser beam with a non-Maxwellian magnetized plasma is described. Nonlinear dispersion relation and growth rate of the instability for left- and right-hand polarizations are derived. The effect of temperature, external magnetic field, value of Kappa and state of polarization on the growth rate are analyzed. It is shown that the growth rate increases with increase in the magnetic field for the right-hand polarization and inversely it decreases for the left-hand one. Also it is observed that existence of super-thermal particles causes the decrease in the growth.

EXPANSION OF LASER-PRODUCED ION BEAMS IN AN AXIAL MAGNETIC FIELD

2002 ◽  
Vol 6 (4) ◽  
pp. 8
Author(s):  
J. Wolowski ◽  
J. Badziak ◽  
P. Parys ◽  
E. Woryna ◽  
J. Krasa ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Axial Magnetic Field ◽  
Ion Beams
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