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Antenna induced hot restrike of a ceramic metal halide lamp recorded by high-speed photography

Autor: Juergen Mentel, Patrick Hermanns, A Bergner, T. Hoebing, Peter Awakowicz, C Ruhrmann

Publikováno v: Journal of Applied Physics. 119:113304

The hot restrike is one of the biggest challenges in operating ceramic metal halide lamps with mercury as buffer gas. Compared to a cold lamp, the pressure within a ceramic burner is two orders of magnitude higher during steady state operation due to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::480653cde1ebab859be4c047a2c40cef
https://doi.org/10.1063/1.4943621

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The anodic emitter effect and its inversion demonstrated by temperature measurements at doped and undoped tungsten electrodes

Autor: A Bergner, T. Hoebing, Peter Awakowicz, Patrick Hermanns, Juergen Mentel

Publikováno v: Journal of Physics D: Applied Physics. 49:155504

The admixture of a small amount of emitter oxides, e.g. , or to tungsten generates the so-called emitter effect. It reduces the work function of tungsten cathodes, that are applied in high intensity discharge (HID) lamps. After leaving the electrode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::55fda480555efa63a4042de16255ab4c
https://doi.org/10.1088/0022-3727/49/15/155504

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The gas phase emitter effect of lanthanum within ceramic metal halide lamps and its dependence on the La vapor pressure and operating frequency

Autor: Jos Suijker, T. Hoebing, C Ruhrmann, C Denissen, S Groeger, Peter Awakowicz, A Bergner, Juergen Mentel

Publikováno v: Journal of Applied Physics. 118:053301

The gas phase emitter effect increases the lamp lifetime by lowering the work function and, with it, the temperature of the tungsten electrodes of metal halide lamps especially for lamps in ceramic vessels due to their high rare earth pressures. It i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62cb829d92b990e8d12b0f4998ab137d
https://doi.org/10.1063/1.4927734

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Investigation of the flickering of La2O3and ThO2doped tungsten cathodes

Autor: T. Hoebing, C Ruhrmann, I. Wesemann, H. Traxler, Patrick Hermanns, Peter Awakowicz, Juergen Mentel, A Bergner, W. Knabl

Publikováno v: Journal of Applied Physics. 118:023306

Short-arc lamps are equipped with tungsten electrodes due to their ability to withstand a high thermal load during operation. Nominal currents of more than one hundred amperes lead to a cathode tip temperature near the melting point of tungsten. To r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5492542247736e9dc95eb1cd9b5ea3b
https://doi.org/10.1063/1.4926617

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Investigating antennas as ignition aid for automotive HID lamps

Autor: C Ruhrmann, Peter Awakowicz, A Bergner, S Groeger, Max Engelhardt, Juergen Mentel, T. Hoebing, Stefan Bienholz

Publikováno v: Journal of Physics D: Applied Physics. 48:025201

This paper considers the ignition of mercury-free high-intensity discharge (HID) lamps for car headlights. Due to safety reasons, these lamps need to have a fast run-up phase which is ensured, amongst other things, by a high Xe pressure of roughly 15

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::435b3357e22b6d59c4782167fedea87f
https://doi.org/10.1088/0022-3727/48/2/025201

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Simulation of the hot core mode of arc attachment at a thoriated tungsten cathode by an emitter spot model

Autor: A Bergner, Frank Scharf, G. Kühn, Peter Awakowicz, Juergen Mentel, T. Hoebing, C Ruhrmann

Publikováno v: Plasma Sources Science and Technology

Recently, a constricted attachment of an atmospheric pressure low-current argon arc in the centre of the flat end face of a thoriated tungsten cathode was observed and spectroscopically analysed. Its diameter of 0.6mm and its length of the free stand

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::544b56ea4016ec09583e4640c93db7e4
https://doi.org/10.1088/0963-0252/23/5/054005

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Investigating the outer-bulb discharge as ignition aid for automotive-HID lamps

Autor: Juergen Mentel, Peter Awakowicz, C Ruhrmann, Ulrich Hechtfischer, G Tochadse, A Bergner, S Groeger, T. Hoebing

Publikováno v: Journal of Physics D: Applied Physics. 47:355204

This work considers the ignition process of mercury-free high-intensity discharge lamps used for car headlights. These lamps have to run-up fast. This is achieved with a high xenon pressure of about 15 bar (cold) in the inner bulb. The high filling-g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b55123293560bee4d1e58f343cd7b0ad
https://doi.org/10.1088/0022-3727/47/35/355204

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The effect of active antennas on the hot-restrike of high intensity discharge lamps

Autor: Peter Awakowicz, C Ruhrmann, F Freddy Manders, T. Hoebing, Juergen Mentel, B Koch, A Bergner

Publikováno v: Journal of Physics D: Applied Physics. 47:205501

The ignition voltage of high intensity discharge (HID) lamps with mercury as the buffer gas may rise from 3 kV for the cold state up to more than 15 kV for a hot lamp. By coating a lamp burner with an electrically conductive layer, which operates as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a471799ae1ccb47690cc62b6d0b4a8ce
https://doi.org/10.1088/0022-3727/47/20/205501

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