Last edited by Kazrakinos
Sunday, July 19, 2020 | History

3 edition of Effects of magnetic shear on ion-cyclotron modes found in the catalog.

Effects of magnetic shear on ion-cyclotron modes

Effects of magnetic shear on ion-cyclotron modes

  • 195 Want to read
  • 34 Currently reading

Published .
Written in English

    Subjects:
  • Shear (Mechanics),
  • Magnetic fields -- Physiological effect.,
  • Ion cyclotron resonance spectrometry.

  • Edition Notes

    Statementby Gurudas Ganguli.
    The Physical Object
    FormatMicroform
    Paginationiii, 202 leaves.
    Number of Pages202
    ID Numbers
    Open LibraryOL16482224M

    Electromagnetic ion cyclotron resonance heating in the VASIMR E.A. Bering a,b,c,*, F.R. Chang-Dı´az c, eling of single-pass absorption of the ion cyclotron wave on a magnetic field gradient (Breizman and Arefiev, of inhomogeneities or shear in reducing the threshold for. The inclusion of finite pressure in ideal magnetohydrodynamic theory can explain the reversed magnetic shear Alfvén eigenmodes (RSAE) (or Alfvén cascades) that have been observed in several large tokamaks without the need to invoke an energetic particle mechanism for the existence of these modes.

    Abstract The magnetosheath is both a conduit into the magnetosphere for upstream waves and a source region for new waves. The most structure in wave properties is observed for plasma convecting from the quasi-perpendicular bowshock (with interplanetary magnetic . the growth/damping rates of both the light (H+) and the heavy (O+) ion cyclotron waves (ICWs). We flnd that, in general, the electron drift parallel to the magnetic fleld is the source of instability for both the light and heavy ion cyclotron waves rather than the temperature anisotropy of .

    Definition. An Alfvén wave in a plasma is a low-frequency (compared to the ion cyclotron frequency) travelling oscillation of the ions and the magnetic pashupatinathtempletrust.com ion mass density provides the inertia and the magnetic field line tension provides the restoring force.. The wave propagates in the direction of the magnetic field, although waves exist at oblique incidence and smoothly change into. magnetic ion cyclotron waves is the compression of the magnetopause, which leads to an anisotropic ion distribu-tion, where the anisotropy is the instability source [Anderson and Hamilton, ]. [3] Electromagnetic ion cyclotron waves have been investigated for a long time with both ground!based instruments and satellite experiments.


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Effects of magnetic shear on ion-cyclotron modes Download PDF EPUB FB2

@article{osti_, title = {Orbital effects of magnetic shear and non-local effects of variable density gradients on high-frequency drift instabilities}, author = {Satyanarayana, P.}, abstractNote = {Electrostatic waves with frequencies of the order of or greater than the ion-cyclotron frequency, in a collisionless plasma with density inhomogeneities are examined at the level of linear.

The relationship of magnetic field strength and Fourier transform ion cyclotron resonance mass spectrometry performance was tested using three instruments with the same designs but different fields of7 and tesla.

We found that the theoretically predicted “transformative” effects of magnetic field are indeed observed pashupatinathtempletrust.com by: 6. The implication of the electromagnetic ion-cyclotron (EMIC) instability in the solar wind is still unclear, this instability being fast enough to relax the proton temperature anisotropy, but the 1.

The effect of a magnetic field aligned plasma flow with a transverse velocity gradient (parallel velocity shear) on the excitation of electrostatic ion cyclotron (EIC) waves was investigated experimentally in a Cited by: Theoretical studies of magnetized plasma turbulence: ion-cyclotron turbulence, and shear flow turbulence and its applications to tokamak edge phenomena.

The effect of a magnetic field aligned plasma flowwith a transverse velocity gradient (parallel velocity shear) on the excitation of electrostatic ion cyclotron (EIC) waves was investigated experimentally in a Q machine. The role of parallel velocity shearCited by: Nov 22,  · The relationship of magnetic field strength and Fourier transform ion cyclotron resonance mass spectrometry performance was tested using three instruments with the same design but different fields of7, and tesla.

We found that the theoretically predicted “transformative” effects of magnetic field are indeed observed pashupatinathtempletrust.com by: 6. The effects of the positron concentration and ion temperature anisotropy on the electrostatic ion cyclotron instability are studied analytically, in a magnetized electron-positron-ion plasma with.

The relationship of magnetic field strength and Fourier transform ion cyclotron resonance mass spectrometry performance was tested using three instruments with the same design but different fields of7, and tesla. We found that the theoretically predicted “transformative” effects of magnetic field are indeed observed pashupatinathtempletrust.com by: 6.

Wellness can be described in physical terms as a state that is a function of the organism’s electric polarization vector P(r, t). One can alter P by invasive application of electric fields or by non invasive external pulsed magnetic fields (PMF) or ion cyclotron resonance (ICR)-like combinations of static and sinusoidal magnetic fields.

are ion cyclotron waves. The different lines indicate the different radial mode numbers and, for the high-density condition, all of the modes occur at magnetic fields considerably stronger than the cyclotron field, Bo. Once the ion cyclotron wave has been set up, the ions do not absorb energy from the electric fields.

Ion cyclotron and heavy ion effects on reconnection in a global magnetotail R. Winglee Department of Earth and Space Sciences, University of Washington, Seattle, Washington, USA field drives field-aligned currents and an out-of-plane (or core) magnetic field in ION CYCLOTRON AND HEAVY ION EFFECTS 2of17 A dynamics of the Cited by: The dispersion equation is cast in the form of Gordeyev integrals and is solved numerically.

Numerical solutions indicate that an ion cyclotron instability is excited. The instability occurs roughly at multiples of the ion cyclotron frequency (modified by the shear), with the growth rate or the individual harmonics overlapping in the wavenumber.

Aug 19,  · This facility is charged with developing and exploiting the unique capabilities of Fourier Transform Ion Cyclotron Resonance (FT-ICR) mass spectrometry, and leads the world in instrument and technique development as well as novel applications of FT-ICR mass spectrometry. Fourier-transform ion cyclotron resonance mass spectrometry is a type of mass analyzer (or mass spectrometer) for determining the mass-to-charge ratio (m/z) of ions based on the cyclotron frequency of the ions in a fixed magnetic field.

The ions are trapped in a Penning trap (a magnetic field with electric trapping plates), where they are excited (at their resonant cyclotron frequencies) to a Classification: Mass spectrometry. Resistive instabilities are an issue for all magnetic configurations, since the onset can occur at beta values well below the ideal limit.

The stability of neoclassical tearing modes (NTM) is a key issue for magnetic configurations with a strong bootstrap current. The NTM is a metastable mode; in certain plasma configurations, a sufficiently. On the basis of local analysis where inhomogeneities like the magnetic shear and the finite width current channel, have been ignored which is prevalent in the magnetospheric environment.

On the basis of non-local analysis interesting modification has been incorporated by the inclusion of magnetic pashupatinathtempletrust.com by: 2. Instability of higher harmonic electrostatic ion cyclotron waves 3 described by drifting Maxwellian distributions.

Then the dispersion relation for electrostatic waves with perturbed E 1 ∼ exp(ik·r−ωt) and frequency ω much less than the electron cyclotron frequency Ω e. Space consists predominantly of ionized gas, known as plasma. One of the outstanding issues in space plasma physics is the role of plasma waves and instabilities in the transport of mass, momentum, and energy in space plasmas.

Recent theses are made available electronically at DataSpace. Name Title Advisor(s) Raburn, Daniel. Efficient Numerical Calculation of MHD Equilibria with Magnetic Islands, with Particular Application to Saturated Neoclassical Tearing Modes.

Its inputs are some real-time measurements available on modern tokamaks and the effects of some major actuators, such as the magnetic coils, lower hybrid (LHCD), electron and ion cyclotron frequency (ECCD and ICRH) systems, are particularly taken into account.EMR stands for electron magnetic resonance.

EMR is very similar to the two other resonance techniques that take place here at the lab: nuclear magnetic resonance (NMR) and ion cyclotron resonance (ICR). The big difference is that EMR looks at electrons rather than nuclei (which is the case in NMR) or ions (in the case of ICR).Unfortunately, this book can't be printed from the OpenBook.

If you need to print pages from this book, we recommend downloading it as a PDF. Visit pashupatinathtempletrust.com to get more information about this book, to buy it in print, or to download it as a free PDF.