Determination of the radial temperature profile in a high-pressure mercury discharge using the electrical conductivity

Härtel, G.; Schöpp, Heinz

doi:10.1088/0022-3727/29/11/022

Cited by 4 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mercury pressure is determined using the total mass of mercury inside the known volume of the lamp. The procedure is described in [14] and leads to similar pressure values to those known from [15]. Combining equations ( 5)-( 7) results in…”

Section: Spectroscopic Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Application of the hook method and emission spectroscopy for the determination of radial density and temperature profiles in high-pressure mercury discharges

Kindel

Kettlitz

Schimke

et al. 1998

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

The radial distributions of the temperature and particle density are of decisive importance for the understanding of high-pressure gas discharges. The present paper deals with the measurement of radial density profiles of the excited Hg states 6, 6 and 6 and the determination of the temperature profiles in conventional 250 W high-pressure Hg and discharge lamps. The population densities are determined using the interferometric hook method and the arc temperature by emission spectroscopy. From the density distribution the radial temperature profiles are deduced. They agree well with those determined by emission spectroscopy. It is demonstrated that the hook method is also applicable to such discharges sustained in cylindrical discharge tubes which are usually not very suitable for interferometric measurements.

show abstract

Section: Spectroscopic Measurementsmentioning

confidence: 99%

“…Here the optically thin mercury lines at λ (1) = 577.0 nm (6 3 D 2 -6 1 P 1 ) and λ (2) = 579.1 nm (6 1 D 2 /6 3 D 1 -6 1 P 1 ) are used [16,17]. The atomic data were taken from [18,19] (compare also [14]). Because these two lines are superposed, the resulting spectral emission coefficient is…”

Section: Spectroscopic Measurementsmentioning

confidence: 99%

Application of the hook method and emission spectroscopy for the determination of radial density and temperature profiles in high-pressure mercury discharges

Kindel

Kettlitz

Schimke

et al. 1998

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this case, the source of x-rays was a molybdenum anode x-ray tube. A primary advantage of both x-ray techniques is their effectiveness in situations where optical diagnostics [5][6][7][8][9] are limited. Such situations include those involving optically inaccessible atoms and molecules, optically dense vapours, and arcs enclosed by translucent ceramic arc tubes.…”

Section: Introductionmentioning

confidence: 99%

X-ray absorption imaging of Hg vapour in a ceramic metal-halide lamp using synchrotron radiation

Curry¹,

Adler²,

MacPhee³

et al. 2004

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

The diagnostic technique of x-ray absorption imaging of Hg vapour in high-intensity discharge lamps has been extended. X-ray absorption imaging has been used previously to determine the time-averaged absolute Hg density (Curry J J, Sakai M and Lawler J E 1998 J. Appl. Phys. 84 3066). Now, using an intensified charge-coupled device detector and synchrotron radiation, time-resolved measurements have been made. Although no significant time-dependence was seen as a function of the electrical phase for an electronically ballasted lamp, real-time observations were made of the decaying Hg density during the cool-down period. The cold-spot temperature in a 150 W ceramic lamp containing Hg and rare-earth iodides decreased with a time constant of 48.4 s following arc extinction. The primary limitation to the sensitivity of these measurements has been identified, and methods for overcoming this limitation in future work are proposed. Other aspects of the technique are also discussed.

show abstract

Spectroscopic measurement of radiation of high-pressure mercury discharge lamps

Leutz

Ries

2005

Journal of Applied Physics

View full text Add to dashboard Cite

Compact size and high efficiency are important features for projection systems. As the most often used sources for projection optics, short arc lamps are characterized by their impressive economy and the ability to produce extremely bright light from small dimensional sources. In this contribution the old principle of back reflection towards the sources is applied to a high-pressure mercury discharge lamp with a reflector to improve the radiance of the source by 35% at a certain reduced solid angle. Increasing the optical thickness of sources is equivalent to reducing the total phase space (etendue) of emitted radiation by the same factor, which is very useful for compacting sources. In addition, by comparing the forward radiation and the back-reflected radiation obtained from spectroscopic measurements, we calculate the absorptivity, emissivity, absorption, and emission coefficients of the plasma of the arc lamp based on Kirchhoff’s Law and Planck’s equation which is necessary for determining its temperature and pressure.

show abstract

Determination of the radial temperature profile in a high-pressure mercury discharge using the electrical conductivity

Cited by 4 publications

References 10 publications

Application of the hook method and emission spectroscopy for the determination of radial density and temperature profiles in high-pressure mercury discharges

Application of the hook method and emission spectroscopy for the determination of radial density and temperature profiles in high-pressure mercury discharges

X-ray absorption imaging of Hg vapour in a ceramic metal-halide lamp using synchrotron radiation

Spectroscopic measurement of radiation of high-pressure mercury discharge lamps

Contact Info

Product

Resources

About