6533b824fe1ef96bd127feb1
RESEARCH PRODUCT
A study of capillary discharge lamps in Ar–Hg and Xe–Hg mixtures
Ja SkudraNatalia DenisovaG. RevaldeRita VeilandeZanda Gavaresubject
Gas-discharge lampAcoustics and UltrasonicsChemistryMicroplasmaCapillary actionOptical measurementsPlasmaCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialslaw.inventionPhysics::Plasma PhysicslawExcited statePhysics::Space PhysicsRadiative transferTomographyAtomic physicsdescription
Low-pressure capillary discharge lamps in Ar–Hg and Xe–Hg mixtures are studied. The discharge size is 0.5 mm (500 µm) in radius. According to the literature, such types of plasma sources are classified as microplasmas. The studies include spectrally resolved optical measurements, tomographic reconstructions and numerical simulations using the collisional–radiative model for an Ar–Hg plasma. We discuss the problems of theoretical modelling and experimental diagnostics of microplasma sources. It is shown that the conventional collisional–radiative model, based on the assumption that transportation of atoms in the highly excited states can be neglected, has limitations in modelling a capillary discharge in an Ar–Hg mixture. It is found that diffusion of highly excited mercury atoms to the wall influences the emission properties of the capillary discharge. We have concluded that applications of the emission tomography method to microplasmas require a special analysis in each particular case.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-03-28 | Journal of Physics D: Applied Physics |