2016
DOI: 10.1063/1.4963850
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Direct measurement of the plasma loss width in an optimized, high ionization fraction, magnetic multi-dipole ring cusp

Abstract: The loss width of plasma in the WiPAL multi-dipole magnetic ring cusp [Cooper et al., Phys.

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Cited by 17 publications
(18 citation statements)
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“…Although the ion confinement time is approximately 1 ms (Cooper et al. 2014, 2016), the momentum exchange with the neutral gas effectively couples the plasma momentum to the stationary wall (Amnon Fruchtman 2008). The high speeds and shear flow required for creating a dynamo can only be achieved by reducing this neutral drag on the ions.…”
Section: Experimental Apparatusmentioning
confidence: 99%
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“…Although the ion confinement time is approximately 1 ms (Cooper et al. 2014, 2016), the momentum exchange with the neutral gas effectively couples the plasma momentum to the stationary wall (Amnon Fruchtman 2008). The high speeds and shear flow required for creating a dynamo can only be achieved by reducing this neutral drag on the ions.…”
Section: Experimental Apparatusmentioning
confidence: 99%
“…These conditions are realised in a large, spherical ring-cusp device referred to as the Big Red Ball (BRB) (Cooper et al. 2014, 2016; Weisberg et al. 2017), part of the Wisconsin Plasma Physics Laboratory (WiPPL).…”
Section: Introductionmentioning
confidence: 99%
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“…The ring cusp magnetic field is used to confine steadystate helium and argon discharges, wherein the narrow mirror cusp loss width allows for the sustained generation of dense, warm plasmas. 20 Scanning Langmuir probe measurements show that the bulk of the plasma is homogeneous, with no gradients in electron temperature or density. The sharp gradient that defines the plasma edge is typically 10 cm wide, and the plasma density drops to zero about 10 cm from the vessel wall when measured along a radial chord bisecting two magnet rings.…”
Section: Description Of the Experimentsmentioning
confidence: 99%