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Bestimmung der Elektronenanzahldichte in einem Helium-Plasma / Determination of the Electron Density in a Helium Plasma
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1976
Year
Helium PlasmaEngineeringPlasma SciencePlasma PhysicsStark BroadeningContinuum RadiationPlasma SimulationPlasma TheoryPlasma ConfinementPlasma DiagnosticsElectron DensityPhysicsBestimmung Der ElektronenanzahldichteApplied Plasma PhysicAtomic PhysicsNatural SciencesSpectroscopyApplied PhysicsPlasma ApplicationElectron Densities
A comparison was made between electron densities determined from the emission coefficient of the continuum radiation and from Stark broadening of line profiles using a wall stabilized pulsed arc plasma with electron temperature T = 38 000 K and electron density from 2 × 10 22 m −3 to 3.5 × 10 22 m −3 . The measured peak separation in the profiles of the He I lines 447.1 nm and 492.2 nm was consistent with that predicted by G.B.K.O.- and B.C.S.-theory and agrees with the experimental results from Bötticher, Roder, and Wobig. The measured halfwidth of the He I 501.6 nm line agrees with the results from Kusch and shows a discrepancy to the G.B.K.O.-theory by a factor about 1.7. The results for the Stark broadening halfwidth of the He II lines 468.6 nm and 320.3 nm lie between the values from G.K.S.-and K.G.-theory.