6533b7dbfe1ef96bd1270289
RESEARCH PRODUCT
Photoelectron Emission from Metal Surfaces Induced by VUV-emission of Filament Driven Hydrogen Arc Discharge Plasma
Taneli KalvasJ. KomppulaJanne LaulainenHannu KoivistoOlli Tarvainensubject
010302 applied physicsMaterials scienceHydrogenPhysics::Instrumentation and DetectorsFluxchemistry.chemical_elementFOS: Physical sciencesPlasma01 natural sciences7. Clean energyPhysics - Plasma PhysicsIon source010305 fluids & plasmasElectric arcPlasma Physics (physics.plasm-ph)chemistryPhysics::Plasma Physics0103 physical sciencesPhysics::Atomic and Molecular ClustersQuantum efficiencyPhysics::Atomic PhysicsAtomic physicsHydrogen spectral seriesOrder of magnitudedescription
Photoelectron emission measurements have been performed using a filament-driven multi-cusp arc discharge volume production H^- ion source (LIISA). It has been found that photoelectron currents obtained with Al, Cu, Mo, Ta and stainless steel (SAE 304) are on the same order of magnitude. The photoelectron currents depend linearly on the discharge power. It is shown experimentally that photoelectron emission is significant only in the short wavelength range of hydrogen spectrum due to the energy dependence of the quantum efficiency. It is estimated from the measured data that the maximum photoelectron flux from plasma chamber walls is on the order of 1 A per kW of discharge power.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-03-27 |