Effect of a central barrier potential on asymmetry-induced transport in a coaxial Malmberg–Penning trap

Eggleston, Dennis L.

doi:10.1063/5.0153208

Effect of a central barrier potential on asymmetry-induced transport in a coaxial Malmberg–Penning trap

Journal Article · Fri Jun 23 00:00:00 EDT 2023 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0153208· OSTI ID:1984374

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Occidental College, Los Angeles, CA (United States); Occidental College

Experiments are presented measuring the radial particle flux produced when a central barrier potential is applied to the central ring of a coaxial Malmberg-Penning trap at the same time as the voltages producing the main asymmetry potential $$\phi_1(r)\cos{(kz)}\cos{(l\theta-\omega t)}$$. When a negative DC voltage is applied to the entire central ring, the peak flux produced by the main asymmetry is reduced by a factor $$e^{(V_{eff}/1.2)}$$ where $$V_{eff}$$ is the effective applied potential in volts. This barrier potential also increases the frequency of this peak flux. When asymmetric $$\pm$$ voltages are applied to the two azimuthally-divided halves of the central ring, DC voltages increase the radial flux while AC voltages decrease it. It is shown that these asymmetric barrier voltages produce their own transport and that the resulting modification of the plasma may be a factor in changing the observed flux.

View Accepted Manuscript (DOE)

Research Organization:: Occidental College, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-06ER54882

OSTI ID:: 1984374

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 30; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Effect of a central barrier potential on asymmetry-induced transport in a coaxial Malmberg–Penning trap

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