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Measuring the Plasma Density of a Ferroelectric Plasma Source in an Expanding Plasma.

DE2004821515

Publication Date	2004
Personal Author	Dunaevsky, A.; Fisch, N. J.
Page Count	36
Abstract	The initial density and electron temperature at the surface of a ferroelectric plasma source were deduced from floating probe measurements in an expanding plasma. The method exploits negative charging of the floating probe capacitance by fast flows before the expanding plasma reaches the probe. The temporal profiles of the plasma density can be obtained from the voltage traces of the discharge of the charged probe capacitance by the ion current from the expanding plasma. The temporal profiles of the plasma density, at two different distances from the surface of the ferroelectric plasma source, could be further fitted by using the density profiles for the expanding plasma. This gives the initial values of the plasma density and electron temperature at the surface.
Keywords	Plasma density Ferroelectric materials Capacitance Ceramics Electron temperature Probes Diagnostics Ions Electrodes Gas discharges
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Princeton Univ., NJ. Plasma Physics Lab.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200416

Measuring the Plasma Density of a Ferroelectric Plasma Source in an Expanding Plasma.

Measuring the Plasma Density of a Ferroelectric Plasma Source in an Expanding Plasma.
DE2004821515

Publication Date	2004
Personal Author	Dunaevsky, A.; Fisch, N. J.
Page Count	36
Abstract	The initial density and electron temperature at the surface of a ferroelectric plasma source were deduced from floating probe measurements in an expanding plasma. The method exploits negative charging of the floating probe capacitance by fast flows before the expanding plasma reaches the probe. The temporal profiles of the plasma density can be obtained from the voltage traces of the discharge of the charged probe capacitance by the ion current from the expanding plasma. The temporal profiles of the plasma density, at two different distances from the surface of the ferroelectric plasma source, could be further fitted by using the density profiles for the expanding plasma. This gives the initial values of the plasma density and electron temperature at the surface.
Keywords	Plasma density Ferroelectric materials Capacitance Ceramics Electron temperature Probes Diagnostics Ions Electrodes Gas discharges
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Princeton Univ., NJ. Plasma Physics Lab.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200416