Electromagnetic instabilities and gyrophase-bunched particles

Gary, S. Peter; Thomsen, Michelle F.; Fuselier, Stephen A.
February 1986
Physics of Fluids (00319171);Feb86, Vol. 29 Issue 2, p531
Academic Journal
The linear theory of electromagnetic instabilities at propagation parallel or antiparallel to a uniform magnetic field B(0) is used to calculate the relative phase angle ψj between the fluctuating velocity vector of the jth component and the fluctuating magnetic field. A criterion that determines when this phase relationship leads to observable gyrophase bunching during the linear growth phase of an instability is also derived. The theory is applied to bunching of ion components by ion beam instabilities. Among the electromagnetic cool ion beam instabilities, it is found that the right-hand resonant mode is most likely to cause observable gyrophase bunching of an ion beam during linear growth, and that for sufficiently large beam–core relative drift speeds, ψb [bar_over_tilde:_approx._equal_to]90° at maximum growth for instability propagation parallel to B(0).


Related Articles

  • Simulations of magnetically insulated multistage ion diodes. Slutz, S.A.; Poukey, J.W.; Pointon, T.D. // Physics of Plasmas;Jun94, Vol. 1 Issue 6, p2072 

    Presents an analytic theory for magnetically insulated multistage acceleration of high intensity ion beams. Prediction of an operating behavior strongly dependent on the electron density profile; Growth of electromagnetic instabilities in the three-dimensional simulations; Generation of ion...

  • Stabilization of the field-reversed configuration (FRC) tilt instability with energetic ion beams. Barnes, D. C.; Milroy, R. D. // Physics of Fluids B: Plasma Physics;Sep91, Vol. 3 Issue 9, p2609 

    The stabilization of the internal tilt mode of a field-reversed configuration by injecting a minority energetic ion component has been investigated numerically. Calculations that follow ion orbits in a specified three-dimensional magnetic field configuration, corresponding to a partially tilted...

  • Remote feedback stabilization of tokamak instabilities*. Sen, A.K. // Physics of Plasmas;May94, Vol. 1 Issue 5, p1479 

    Reports on the use of a novel remote suppressor consisting of an injected ion beam for the stabilization of plasma instabilities. Suppression of a collisionless curvature-driven trapped-particle instability; Experimental demonstration of a multimode feedback stabilization with a single...

  • Kelvin–Helmholtz instability in collisionless space plasmas. Pu, Zu-yin // Physics of Fluids B: Plasma Physics;Feb89, Vol. 1 Issue 2, p440 

    The drift kinetic approximation (DKA) is developed by combining the macro- and microdynamics of guiding center plasmas. It is shown that the DKA provides a better description for collisionless processes in plasmas than the Chew–Goldberger–Low approximation. A new theory of the...

  • The blow-up rate of the envelope instability of a cold beam in a storage ring. Yang, B.; Bisoffi, G.; Lamanna, G.; Lenisa, P.; Tecchio, L.; Variale, V. // Physics of Plasmas;Feb96, Vol. 3 Issue 2, p688 

    Investigates envelope instability in a storage ring using particle simulation. Typical distortion pattern of the instability observed in transverse phase planes of cold ion beams considering the storage ring both with and without ring periodicity perturbations; Dependence of the blow-up rate of...

  • Status of the electrostatic plasma lens. Goncharov, A. // Review of Scientific Instruments;Feb2002, Vol. 73 Issue 2, p1004 

    The electrostatic plasma lens provides an important tool for the manipulation of high current heavy ion beams with moderate energy of 1–100 keV. Applications can include, for example, high dose ion implantation and particle accelerator injection. Here we briefly review the plasma lens...

  • Multidimensional electron beam-plasma instabilities in the relativistic regime. Bret, A.; Gremillet, L.; Dieckmann, M. E. // Physics of Plasmas;Dec2010, Vol. 17 Issue 12, p120501 

    The interest in relativistic beam-plasma instabilities has been greatly rejuvenated over the past two decades by novel concepts in laboratory and space plasmas. Recent advances in this long-standing field are here reviewed from both theoretical and numerical points of view. The primary focus is...

  • Detailed structure and dynamics in particle-in-cell simulations of the lunar wake. Birch, Paul C.; Chapman, Sandra C. // Physics of Plasmas;Oct2001, Vol. 8 Issue 10 

    The solar wind plasma from the Sun interacts with the Moon, generating a wake structure behind it, since the Moon is to a good approximation an insulator, has no intrinsic magnetic field and a very thin atmosphere. The lunar wake in simplified geometry has been simulated via a 1[FRACTION...

  • Collective processes in complex plasmas. Shukla, P. K. // AIP Conference Proceedings;2000, Vol. 537 Issue 1, p3 

    During the last decade, we have seen a very rapid growth of the dusty plasma physics with many discoveries. The latter include the dust acoustic wave, the wakefield and the ion focusing (which are responsible for the attraction of charged dust grains), the dusty plasma crystals as well as...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics