Ion ring propagation in a magnetized plasma

Schamiloglu, E.; Greenly, J. B.; Hammer, D. A.
August 1993
Physics of Fluids B: Plasma Physics;Aug93, Vol. 5 Issue 8, p3069
Academic Journal
The propagation of an ion ring in a 2.5 m long, 0.30 m diam magnetized plasma column was studied using an axial array of magnetic probes and fast proton detectors, a microwave interferometer, and a grating spectrometer. The ring propagated with an initial axial velocity 3×106 m/sec, about four times the Alfvén speed in the plasma, and excited damped magnetosonic waves whose peak amplitude depended on the plasma return current. The plasma electrons were heated by about 1 eV in response to the ring, as measured by the Hγ line-to-continuum intensity ratio. This heating is primarily attributed to classical Coulomb collisions, although about 1%–10% can be attributed to the collective ring–plasma interaction. The collective interaction had no measurable effect on the dynamics of the ion ring, consistent with theoretical models, given the beam, plasma, and magnetic-field parameters in the experiment.


Related Articles

  • Determination of electron density and temperature in non-LTE plasmas from spectral lines of impurity ions. Kunc, Joseph A. // Journal of Applied Physics;2/1/1988, Vol. 63 Issue 3, p656 

    Focuses on a study that presented an approach to determine the population of the excited lithiumlike ions in stationary nonequilibrium plasmas. Methodology; Discussion of rate coefficients; Results and discussion.

  • Poloidal ion motion during formation of toroidal high beta plasmas. Antoniades, J. A.; Goldenbaum, G. C.; Weber, B. V. // Physics of Fluids (00319171);May88, Vol. 31 Issue 5, p1244 

    Spectroscopic measurements of the ion motion in a fast compression high beta tokamak experiment show paramagnetic ion motion. This motion is initially caused by magnetic field gradient drift, which does not produce any net paramagnetic current opposing the plasma diamagnetic current. After the...

  • Resonant coupling between ion bounce in a potential well and the potential relaxation instability. Popa, G.; Schrittwieser, R. // Physics of Plasmas;Jan1994, Vol. 1 Issue 1, p32 

    Examines the resonant coupling between ion bounce in a potential well and the potential relaxation instability. Factors attributed to the formation of low-density plasma; Formation of a positive space-charge behind the grid in the target chamber; Potential relaxation oscillation.

  • Kink stability of a field-reversed ion layer in a background plasma. Ishida, A.; Sudan, R. N.; Rosenbluth, M. N.; Engquist, M. G. // Physics of Fluids (00319171);Aug86, Vol. 29 Issue 8, p2580 

    By means of the two-fluid energy principle, the kink stability boundary of a field-reversed ion layer of arbitrary thickness immersed in a dense low-temperature background plasma is investigated theoretically. This system is found to have a stability window against kinks. The dependence of the...

  • Optimizing hot-ion production from a gas-injected washer gun. McCarrick, M. J.; Ellis, R. F.; Booske, J. H.; Koepke, M. // Journal of Applied Physics;3/1/1987, Vol. 61 Issue 5, p1747 

    Presents information on a study which investigated the maximization of the ion temperature of the plasma generated by a gas-injected washer gun. Experimental setup; Summary of relevant diagnostics; Experimental results.

  • Optical confinement of low-temperature plasma with resonant ions. Gavrilyuk, A. P.; Krasnov, I. V.; Shaparev, N. Ya. // JETP Letters;3/10/96, Vol. 63 Issue 5, p324 

    Applications of the rectification of a gradient force in interfering bichromatic fields produced by intersecting laser beams for selective optical confinement of low-temperature electron-ion plasma with resonant ions are examined. © 1996 American Institute of Physics.

  • Effect of trapped ions on shielding of a charged dust grain in a plasma. Tskhakaya, D. D.; Shukla, P. K.; Stenflo, L. // Physics of Plasmas;Dec2001, Vol. 8 Issue 12, p5333 

    The trapped ion effects on the shielding of a charged dust grain in a plasma are examined. It is shown that ions with low angular momentum cannot form a trapped cloud in a potential well. Therefore, it is necessary to examine the possibility of producing trapped ion clouds with large angular...

  • Ion flux uniformity in inductively coupled plasma sources. Denysenko, Igor; Dudin, Stanislav; Zykov, Aleksander; Azarenkov, Nikolay; Yu, M. Y. // Physics of Plasmas;Nov2002, Vol. 9 Issue 11, p4767 

    The spatial distribution of the ion flux at the substrate or work surface in inductively coupled plasma source is studied experimentally and theoretically. The theoretical study is based on a two-dimensional fluid model and the well-known global model. The spatial profiles of the electron...

  • The small-parallel-ion-velocity effect on the ballooning modes with frequency lower than the... Zheng, L.-J.; Tessarotto, M. // Physics of Plasmas;Apr95, Vol. 2 Issue 4, p1250 

    Presents the collisionless kinetic ballooning mode theory in the case of the frequency of modes being lower than the ion magnetic drift frequency in the outer region of the ballooning representation space. Derivation of a fluid-like kinetic ballooning mode equation; Solutions of the gyrokinetic...


Read the Article


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

Try another library?
Sign out of this library

Other Topics