Mehrstoffsysteme

Busch, A.; Grau, G. G.; Kast, W.; Klemenc, Alfons; Kohl, W.; Kux, C.; Meyerhoff, G.; Neckel, A.; Ruhtz, E.; Schäfer, Kl.; Valentiner, S.; Schäfer, Klaus; Lax, Ellen

doi:10.1007/978-3-662-43283-9_1

Cited by 1 publication

(1 citation statement)

References 1,259 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A direct measurement of the ground state density via ABS is not possible, as the evaporated amount is below the detection threshold in the investigated cold spot temperature range, which is located at a density of 8×10 20 m −3 for the utilized setup. But since the value of T CS is known, the InBr density in the gas phase can be calculated with the vapour pressure curve (taken from [16]) and the heating temperature T H of the discharge vessel after the ideal gas law [4]. However, it should be borne in mind that the obtained density values are volume averaged and can only be used as an estimate for the ground state density as excitation, dissociation and ionization processes occur in the plasma.…”

Section: Particle Densitiesmentioning

confidence: 99%

Diagnostics of low-pressure discharges containing InBr studied for lighting applications

Briefi¹,

Fantz²

2013

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

The utilization of InBr in low-pressure rare-gas plasmas for lighting applications may serve as an efficient alternative to hazardous mercury, which is used in common fluorescent lamps as a radiator. In order to perform systematic investigations of these discharges, diagnostic methods are required to gain insight into the relevant plasma parameters. This goal can be achieved by using white light absorption and optical emission spectroscopy supported by an extended corona model of the indium atom and a simulation of the relative intensity of the InBr emission. The set of diagnostic methods is exemplarily applied to measurements on an inductively coupled argon discharge at 100 W power with varying InBr content. The plasma parameters are derived and the processes determining their changes with varying InBr density are identified. Increasing the InBr density results in a decrease in T e but an increase in n e , which can be explained by considering the ionization and power balance. The relevant population processes for the rovibrational states of InBr are inelastic collisions with heavy particles with an increasing importance of electron impact excitation at a higher InBr density. The radiated power is maximal at a cold spot temperature between 210 and 220 • C as reabsorption occurs at a high InBr density.

show abstract

Section: Particle Densitiesmentioning

confidence: 99%