Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Plasmas
9 (2002), S. 766-771
ISSN:
1089-7674
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Electron plasmas are trapped in a novel "partially" toroidal (or "C"-shaped) trap designed to study issues of equilibrium, stability, and confinement of toroidal nonneutral plasmas. Plasmas with densities as high as 3.3×106 cm−3 are trapped and decay on a 100 μs timescale in a 196 G magnetic field. Successful trapping of dense electron plasmas requires the application of a strong horizontal electric field (5–10 V/cm). The confinement time scales as the 〈fraction SHAPE="CASE"〉32 power of the magnetic field. Oscillations in the image charge current to a grounded probe have a frequency that is proportional to 1/B and roughly proportional to the vacuum horizontal electric field. However, the frequency is independent of the amount of charge in the trap. Some evidence points toward the ion resonance instability as the driving mechanism for this new toroidal electron mode. © 2002 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1445425
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