Power balance in highly loaded fluorescent lamps

Lister, G. G.; Curry, John J.; Lawler, J. E.

doi:10.1088/0022-3727/37/22/007

Cited by 12 publications

(13 citation statements)

References 30 publications

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“…This is the analytic value of Lawler et al [12] corrected as they describe for the refraction and transmission of the lamp envelope. Based on calculations reported by Lister, Curry and Lawler [13], we estimate that the depletion factor as defined in [12] for our 40 • C data ranges from about 0.03 at low current to 0.14 at high current. At these low values of depletion, the cataphoresis correction to β is small.…”

Section: Discussionmentioning

confidence: 59%

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Spectral radiance of strong lines in positive column mercury discharges with argon carrier gas

Sansonetti¹,

Reader²

2006

J. Phys. D: Appl. Phys.

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The spectral radiance of the 185 and 254 nm lines in two positive column mercury discharge lamps was measured over a wide range of operating conditions. The lamps had internal diameters of 5 and 23 mm. Argon was used as a carrier gas. The lamps were operated with cold spot temperatures of 20, 40 and 60 °C. At each of these temperatures, results were obtained for five currents ranging from 20 to 100 mA for the 5 mm lamp and from 200 to 1000 mA for the 23 mm lamp. For each current studied, results were determined for argon pressures ranging from 66.6 to 666 Pa (0.5 to 5.0 Torr) in the 5 mm lamp and 26.6 to 666 Pa (0.2 to 5.0 Torr) in the 23 mm lamp. An argon miniarc was used as the radiometric standard. By calibrating the spectral response of the optical system with a well-characterized mercury pencil lamp, results were obtained for 12 additional Hg lines from 289 to 579 nm. For the 23 mm lamp the electric field in the positive column was measured. For this lamp the radiated power as a percentage of input power was also determined. The results provide an experimental basis for validating computer models of Hg fluorescent lamp discharges.

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Section: Discussionmentioning

confidence: 59%

“…We have not attempted to include it, but its effect would be to increase the radiated power at the highest currents by about 3%. For the higher Hg densities at 60 • C, the effect of cataphoresis is less important [13].…”

Section: Discussionmentioning

confidence: 99%

Spectral radiance of strong lines in positive column mercury discharges with argon carrier gas

Sansonetti¹,

Reader²

2006

J. Phys. D: Appl. Phys.

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“…The first term of this equation is written in a fashion that clarifies that some of the reduction in the central density of Hg atoms was due to gas heating. This effect was neglected in the initial analysis of absorption data from our experiment, but was included in the more detailed modelling described in the companion paper (Lister et al 2004). A cold spot temperature of 323 K was maintained for most of the experimental results reported herein.…”

Section: Theoretical Model Of Radial Cataphoresismentioning

confidence: 99%

“…where k B is Boltzmann's constant and e is a unit charge. In order to solve equation ( 1) precisely it is necessary to couple this equation into a more complete discharge model as was done in the companion paper (Lister et al 2004). However, a first order analysis can be performed by assuming that the radial distribution of Hg + ions is described by the lowest spatial mode for ambipolar diffusion.…”

Section: Theoretical Model Of Radial Cataphoresismentioning

confidence: 99%

A study of radial cataphoresis and ion densities in high power density Hg–Ar discharges

Aiura¹,

Lawler²

2004

J. Phys. D: Appl. Phys.

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A synchrotron radiation absorption experiment was used to measure the absolute density of ground level Hg atoms and Hg+ ions in Hg–Ar discharge plasmas at high power densities. Ion densities from this experiment were tested using microwave interferometry and compared with Langmuir probe measurements of the electron density. Radial cataphoresis was observed in this experiment and compared with model predictions. The agreement was satisfactory between the experiment and model. The role of cataphoresis in the power balance of Hg–Ar plasmas was further explored in the research described in the companion paper (Lister et al. 2004 J. Phys. D: Appl. Phys. 37: 3099–3106).

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“…Lawler and have been carried out by refs [13][14], they use an experimental work to measure the ground level Hg atoms concentration and the ions density of the mercury.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Processes in an Induction Lamp

Halima

Abdelmlak

Sammoudi

et al. 2023

Preprint

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This paper investigates the kinetic study in an inductive discharge lamp. Numerical simulation of electron density and other parameters that characterize the plasma are discussed and their values are compared with what is expected in inductive plasma and which show a good agreement considering the electron density and the electron temperature values . Such research allows us to understand the relationship between the radial distribution of electronic temperature and the electrical density of the lamp and the frequency of operation. The influence of the current is presented and the performance of the lamp can be found.

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Power balance in highly loaded fluorescent lamps

Cited by 12 publications

References 30 publications

Spectral radiance of strong lines in positive column mercury discharges with argon carrier gas

Spectral radiance of strong lines in positive column mercury discharges with argon carrier gas

A study of radial cataphoresis and ion densities in high power density Hg–Ar discharges

Fundamental Processes in an Induction Lamp

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