Stark shift and broadening of FI and ClI lines

Djurović, S.; Konjević, N.

doi:10.1007/bf01425759

Cited by 13 publications

(7 citation statements)

References 13 publications

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“…Figure 8 presents such computed and experimental values of the Stark line width. Our experimentally measured parameters lie inside the computed values of Dimitrijevic [10] and Griem [4] and the scattered measurements [11,12]. Because the results of Dimitrijevic are the more recent, we decided to use a linear least-squares fit to these data for all forthcoming computations.…”

Section: Selection Of a Specific Line And The Associated Stark Parametersupporting

confidence: 61%

Combination of emission spectroscopy and fast imagery to characterize high-voltage circuit breakers

Hartinger¹,

Pierre²,

Cahen³

1998

J. Phys. D: Appl. Phys.

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To investigate the break phenomenon in high-voltage circuit breakers, a novel experimental approach combining spectroscopy and imagery for measuring electron density, temperature and arc geometry is presented. Images of the arc were taken using a narrow band optical filter, and spectra of the entire arc and in the same spectral region were recorded simultaneously. We report tests both on this method and on the available literature data and the results obtained on two different circuit breaker models. For the high-current phase (I = 2 kA to 10 kA) we chose to study the well isolated 624-641 nm fluorine lines radiating at elevated temperatures, expected to be in the range 15 000-20 000 K. With electronic densities higher than , the Stark effect, as the predominant line broadening mechanism, yields a direct relation between plasma conditions and the measured spectrum. Corrections for eventual self-absorption were applied with the arc geometry deduced from the corresponding images. The results thus obtained compare favourably with and show less scatter than those of the conventional Boltzmann diagram method. They also agree with numerical simulations. During the extinction phase, copper lines between 510 nm and 522 nm radiating at lower temperatures were selected for similar measurements. The images reveal that either a filament-like arc or well isolated hot gas pockets are present during extinction. The measured temperature was still high even a few hundred microseconds before ultimate extinction. This result is fully compatible with computations of the cooling process. The hot gas pockets could be used as a tracer for flow velocity measurements.

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Section: Selection Of a Specific Line And The Associated Stark Parametersupporting

confidence: 61%

Combination of emission spectroscopy and fast imagery to characterize high-voltage circuit breakers

Hartinger¹,

Pierre²,

Cahen³

1998

J. Phys. D: Appl. Phys.

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“…The results obtained from semiclassical calculations, (1)(2)(3)(4) and from a simplified semiclassical approach [6] for electron impact half-halfwidths we and shifts de for investigated multiplets of halogen atoms at an electron concentration N~= 1 x 1022 m -3 and temperatures of 5000, 10000, 20000, 30000 and 40000K are given in Table 2 together with corresponding ion broadening parameter A. In Table 2 of Stark halfwidths and shifts from data in Table 2 one can use approximate formulas, see e.g.…”

Section: Theoretical Resultsmentioning

confidence: 99%

“…Finally, regularities of the Stark widths within multiplet and along analogous transitions of h o m o l o g o u s atoms prove again (see also [1][2][3]20]) the results of general study of regularities of Stark widths [19]. These regularities can be used as a very useful guideline whenever study of Stark broadening of uninvestigated lines is performed.…”

Section: O N C L U S I O N Smentioning

confidence: 89%

“…Experimental apparatus and procedure are described elsewhere [1][2][3] and therefore minimum details will be given here.…”

Section: Apparatusmentioning

confidence: 99%

“…Recently, results of a study of the Stark broadening and shift of halogen atom lines in a plasma of a wall stabilized arc have been reported [1][2][3]. Comparison between experimental results and simple theoretical calculations [1] has shown large discrepancy for BrI lines from (102) 5 p 2p0 not detected for the lines of other transitions of halogen atoms .…”

Section: Introductionmentioning

confidence: 95%

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Stark broadening of halogen atom lines from (1 D)n p levels

Djurović

Konjević

Dimitrijević

1990

Z Phys D - Atoms, Molecules and Clusters

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We report results of a study of the Stark broadening of halogen atom lines from (~D) np levels. Wall stabilized arc is used as a plasma source. Electron densities 2.2-3.2 x 1022 m -3 are determined from the width of H~ line and electron temperature 9300-10000 K from plasma composition data. The agreement with the results of simple semiclassical calculations is within the limits of the estimated errors of both experiment and theory. An explanation for the large discrepancy between theory and experiment detected for three BrI lines is offered.

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Stark broadening and shift of neutral iodine lines and regularities for analogous transitions of halogene atoms

Djurović

Konjević

1988

Z Phys D - Atoms, Molecules and Clusters

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Stark shift and broadening of FI and ClI lines

Cited by 13 publications

References 13 publications

Combination of emission spectroscopy and fast imagery to characterize high-voltage circuit breakers

Combination of emission spectroscopy and fast imagery to characterize high-voltage circuit breakers

Stark broadening of halogen atom lines from (1 D)n p levels

Stark broadening and shift of neutral iodine lines and regularities for analogous transitions of halogene atoms

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