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2 edition of Waves and instabilities in an electron-positron plasma in an ultrastrong magnetic field found in the catalog.

Waves and instabilities in an electron-positron plasma in an ultrastrong magnetic field

Peter Pulsifer

Waves and instabilities in an electron-positron plasma in an ultrastrong magnetic field

by Peter Pulsifer

  • 308 Want to read
  • 16 Currently reading

Published .
Written in English

    Subjects:
  • Plasma instabilities.,
  • Electron gas -- Electric properties.,
  • Electron gas -- Magnetic properties.,
  • Positronium.

  • Edition Notes

    Other titlesWaves and instabilities in an electron-positron gas in an ultrastrong magnetic field
    Statementby Peter Pulsifer.
    ContributionsBoston College. Dept. of Physics.
    The Physical Object
    Paginationviii, 312 leaves :
    Number of Pages312
    ID Numbers
    Open LibraryOL16580668M

    Parametric instabilities of circularly polarized large-amplitude dispersive Alfvén waves: excitation of parallel-propagating electromagnetic daughter waves - Volume 46 Issue 1 - . The different instabilities that can result from such a particle distribution and the resultant instabilities that may be of importance along the open magnetic field lines inside the star's rotational speed of light cylinders are identified. The analysis suggests that two instabilities may be of importance in the production of pulsed emission.

    the absence of the magnetic field. The theory of the isotropic relativistic plasma oscillations in the absence of the magnetic field has been developed for a number of years, beginning probably with the work by CLEMMOW and WILLSON (). Among the basic and rather essential works of this direction are the papers by. Peter Pulsifer has written: 'Waves and instabilities in an electron-positron plasma in an ultrastrong magnetic field' -- subject(s): Electron gas, Plasma instabilities, Positronium, Magnetic.

    Relativistic plasmas, e.g. the electron-positron plasma in a supernova explosion, are plasmas in which the ther-mal energy kBT of the plasma particles is of the order of their rest mass energy mc2 or larger. Quantum plas-mas, e.g. the degenerate electron component in a white dwarf, are plasmas in which the thermal de Broglie wave. However, in the present case of moving plasma in the presence of magnetic field, the reduction in the amplitude with σ or positron temperature is contrary to the observation made by Moslem in an e-p plasma and by Mahmood and Ur-Rehman in an unmagnetized hot electron-positron-ion (e-p-i) plasma, but the enhancement in the width is the similar.


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Waves and instabilities in an electron-positron plasma in an ultrastrong magnetic field by Peter Pulsifer Download PDF EPUB FB2

Magnetic fields of up to 10 x 13 Gauss were observed in pulsars. At these ultrastrong fields, the energy between Landau levels is comparable to the electron rest-mass, and the cyclotron radius is comparable to the Compton wavelength. To study the electromagnetic properties of an electron or positron gas in such ultrastrong fields, the polarization tensor Pi sub mu nu is : Peter Emery Pulsifer.

Magnetic fields of up to 10^{13 } Gauss have been observed in pulsars. At these ultrastrong fields, the energy between Landau levels is comparable to the electron rest-mass, and the cyclotron radius is comparable to the Compton wavelength. To study the electromagnetic properties of an electron or positron gas in such ultrastrong fields, the polarization tensor Pi_{mu nu} is : Peter Emery Pulsifer.

Using nonrelativistic spin quantum fluid theory, parallel propagating electromagnetic waves in electron–positron plasma immersed in a uniform external magnetic field have been investigated. An electron-positron plasma (pair plasma) behaves differently than an electron-ion plasma because electrons and positrons have the same mass, creating a new system symmetry and invalidating the heavy-ion approximation central to analysis of a range of plasma phenomena.

The vicinities of quasars, pulsars, and black holes are believed to harbor this exotic plasma, and ongoing experiments with. Waves in an electron-positron plasma are investigated in a frame of two-fluid model equation.

Dispersion relations for electrostatic wave, electromagnetic wave and Alfven wave propagating parallel to a constant magnetic field are by: In plasma physics, waves in plasmas are an interconnected set of particles and fields which propagate in a periodically repeating fashion.

A plasma is a quasineutral, electrically conductive the simplest case, it is composed of electrons and a single species of positive ions, but it may also contain multiple ion species including negative ions as well as neutral particles.

Kinetic waves and instabilities in a uniform plasma General dispersion relation Introduction This chapter presents a theoretical survey of the basic kinetic waves and instabili-ties characteristic of a spatially uniform plasma immersed in a uniform, applied magnetic field B0 = Boi.

() found a transition from fluid to kinetic effects at kλ De =where k is the wave number for the most unstable SRS-driven electron plasma wave. A difficulty in making measurements on this phenomenon is the very short growth time of the plasma instabilities – a. An investigation is presented on the very low-frequency electrostatic drift waves due to the motion of the plasma particles in the combined effect of the static magnetic field and the.

electrostatic waves and instabilities in a uniform plasma will be discussed. Low frequency drift type modes in a nonuniform plasma have already been analyzed in Chapter 3.

Dispersion Relation For electrostatic modes, it is not necessary to use the whole Maxwell™s equations, for the magnetic perturbation is assumed to be negligible.

along the magnetic field is an important component in most drift wave instabilities. Since this wave is absent in an electron–positron plasma, the physics of drift wave instabilities, ubiquitous in magnetized electron–ion plasmas, is also fundamentally different.

The mass symmetry also implies that electromagnetic waves traveling along the. The formation of an electron-positron pair in a collision between a photon and a nucleus (Z + γ → Z + e − + e +) and electron–nucleus bremsstrahlung (Z + e − → Z + e − + γ) are two cross-channels of the same have already been formulated in §91 for the transformation of formulae from the latter case to the former.

Applying these rules to (), we find the. Electromagnetic Waves in Plasmas General Treatment of Linear Waves in Anisotropic Medium Start with general approach to waves in a linear Medium: Maxwell: 1 ∂E ∂B ∧B = µ oj + ; () c2 ∂t ∧E = − ∂t we keep all the medium’s response explicit in j.

Plasma is (infinite and) uniform so we Fourier analyze in. Beam–plasma effects are currently being investigated theo-retically for electron–positron plasmas in the context of wave generation and particle acceleration.6–9 The transit-time instability, which is the subject of this paper, was first studied because of its potential as a source of microwave radiation, The nonlinear propagation of electrostatic solitary waves is studied in a collisionless electron-positron pair plasma consisting of adiabatic cool electrons, mobile cool positrons (or electron holes), hot suprathermal electrons described by a j distribution, and stationary ions.

The linear dispersion. The two modes obtained for this e–p–i plasma have similar characteristics as the electron cyclotron and electron acoustic waves investigated by Lazarus et al [26] for a four-component, two-temperature electron– positron plasma.

In the long wavelength limit (k2λ2 Dh 1),the parameter A2 can be reduced to A2 = 3k2v2 ti + ne0 np 0+ e k2v2 ia. Electron–positron pair production due to the decay of vacuum in ultrastrong laser fields is an interesting topic which is revived recently because of the rapid development of current laser technology.

III. PAIR CREATION PROCESSES IN AN ULTRASTRONG MAGNETIC FIELD AND PARTICLE HEATING IN A DYNAMIC MAGNETOSPHERE Christopher Thompson CITA, 60 St.

George Street, Toronto, ON M5S 3H8, Canada Received February 20; accepted August 1 ABSTRACT We first examine the QED processes that create electron-positron pairs in magnetic fields.

Waves in electron-positron plasmas have fundamentally different dispersion characteristics due to the equal charge-to-mass ratios between negative and positive charges, which mix different timescales, and are of interest in understanding aspects of pulsars and active galactic nuclei, where astrophysical electron-positron plasmas occur.

Earlier systematic nonlinear treatments of parallel. Thus, we can now appreciate that plasma waves and Bernstein waves are merely different aspects of a more general type of electrostatic wave. This wave takes the form of a plasma wave when propagating parallel to the equilibrium magnetic field, of a Bernstein wave when propagating perpendicular to the magnetic field, and takes an intermediate.

A hot, relativistic, electron-positron plasma penetrated by a relativistic ion beam is considered. At the front of the magnetosonic shock wave an electromagnetic wave is generated, which should be damped on positrons of the plasma.The behavior of arbitrary amplitude linear and nonlinear electrostatic waves that propagate in a magnetized four component, two-temperature, electron-positron plasma is presented.

The characteristics of the dispersive properties of the associated linear modes using both fluid and kinetic theory are examined. The fluid theory analysis of the electrostatic linear waves shows the existence of.We note that the plasma beta is approximately and may be large enough to cease the LHDI activity.

We conclude that during this Wind encounter, ULF magnetic wave activity and associated electric field was not as strong as the UH emissions. 3. Detailed Particle, B‐Field, and Wave Association in the Vicinity of the X‐Line.