Fast pressure probe measurements of a high-velocity plasma plume

This article reports measurements of stagnation pressure on a contoured coaxial gun, now installed at the Maryland Centrifugal Experiment [R. Ellis et al. , Phys. Plasmas 12, 055704 (2005)]. The impact of the plasma on the stationary probe is consistent with adiabatic compression and supersonic flow...

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Bibliographic Details
Published in:Physics of plasmas 2009-06, Vol.16 (6), p.064502-064502-4
Main Authors: Messer, S., Case, A., Bomgardner, R., Phillips, M., Witherspoon, F. D.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPRESSION
PLASMA
PLASMA DIAGNOSTICS
PLASMA PRESSURE
PROBES
SUPERSONIC FLOW
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Summary:This article reports measurements of stagnation pressure on a contoured coaxial gun, now installed at the Maryland Centrifugal Experiment [R. Ellis et al. , Phys. Plasmas 12, 055704 (2005)]. The impact of the plasma on the stationary probe is consistent with adiabatic compression and supersonic flow. Measured pressure signals are consistent with a shock traveling at 110 km/s and a following flow with speed of 90 km/s. At late times, the pressure profile is consistent with an adiabatically expanding plasma that fills the vacuum chamber.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3148338