radial temperature profile, pure-electron plasma, equilibrum calculations, Malmberg-Penning trap
In 1992, Eggleston et al. [D. L. Eggleston et al., Phys. Fluids B 4, 3432 (1992)] reported on a technique for measuring the radial temperature profile in a pure-electron plasma confined in a Malmberg-Penning trap by partially dumping the plasma onto a charge collector at the end of the trap. For short plasmas and short confining rings, the assumptions in their paper are violated and a more general calculation is needed. This paper presents a variation of the standard equilibrium calculation to find the temperature profile of a pure-electron plasma. Eggleston's shortcut "evaporation" temperature method is found to require a correction factor that can be calculated using methods described in this paper. For typical conditions, the evaporation method overstates the actual temperature by a factor ranging from 1.1 to 1.5 or more, depending on the plasma's total charge and temperature and the geometry of the trap.
Original Publication Citation
Hart, Grant W. and Bryan G. Peterson."Finding the radial parallel temperature profile in a non-neutral plasma using equilibrium calculations on experimental data." Physics of Plasmas 13 (26).
BYU ScholarsArchive Citation
Hart, Grant W. and Peterson, Bryan G., "Finding the radial parallel temperature profile in a non-neutral plasma using equilibrium calculations on experimental data" (2006). All Faculty Publications. 325.
Physical and Mathematical Sciences
Physics and Astronomy
© 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in The Journal of Chemical Physics and may be found at http://link.aip.org/link/?PHPAEN/13/022101/1
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