Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ulrich Hechtfischer"'
Autor:
Ábel Kálosi, Manfred Grieser, Robert von Hahn, Ulrich Hechtfischer, Claude Krantz, Holger Kreckel, Damian Müll, Daniel Paul, Daniel W. Savin, Patrick Wilhelm, Andreas Wolf, Oldřich Novotný
Publikováno v:
Physical Review Letters
We present state-selected measurements of rotational cooling and excitation rates of CH$^+$ molecular ions by inelastic electron collisions. The experiments are carried out at the Cryogenic Storage Ring, making use of a monoenergetic electron beam at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34f317fed5a01116768aa51e0c37de0e
Publikováno v:
Light-Emitting Devices, Materials, and Applications.
Laser-scanner headlamps, based on a blue laser spot steered by a MEMS mirror over a converter, can illuminate the road flexibly and efficiently. Some existing demonstrators suffer from insufficient performance of the converter (low contrast) or of th
Autor:
Ulrich Weichmann, Pavel Pekarski, Hermann Giese, Ulrich Hechtfischer, Jens Pollmann-Retsch, Guenther Derra, Ulrich Niemann, Arnd Ritz, Folke-Charlotte Noertemann, Gero Heusler, Ernst Fischer, Achim Gerhard Rolf Koerber, Holger Moench
Publikováno v:
Journal of Physics D: Applied Physics. 38:2995-3010
Projection systems have found widespread use in conference rooms and other professional applications during the last decade and are now entering the home TV market at a considerable pace. Projectors as small as about one litre are able to deliver sev
Autor:
Michael Lange, Roland Wester, Daniel Zajfman, Andreas Wolf, Joachim Linkemann, Dirk Schwalm, Ulrich Hechtfischer, Carl J. Williams
Publikováno v:
The Journal of Chemical Physics. 117:8754-8777
We have measured and theoretically analyzed a photodissociation spectrum of the CH+ molecular ion in which most observed energy levels lie within the fine-structure splitting of the C+ fragment and predissociate, and where the observed irregular line
Publikováno v:
2012 Abstracts IEEE International Conference on Plasma Science.
Summary form only given. We study the stability of the energy balance of the electron gas in very-high pressure plasmas against longitudinal perturbations, using a local dispersion analysis. After deriving a dispersion equation, we apply the model to
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Numerical and experimental investigation of near-anode layers of very high-pressure arcs in mercury and xenon is reported. The simulation is performed by means of a recently developed numerical model in which the whole of a near-electrode layer is si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d00967140a44d96f058a6fa231ca9a7
Autor:
Pavel Pekarski, Arnd Ritz, Hermann Giese, Achim Gerhard Rolf Koerber, Jens Pollmann-Retsch, Ulrich Hechtfischer, Holger Moench, Ulrich Weichmann, Folke-Charlotte Noertemann, Gero Heusler
Publikováno v:
SPIE Proceedings.
The past decade has seen a rapid development of projection systems. Projectors as small as only a few liters in size deliver several thousand screen lumens and are, with an efficacy of over 10 lm/W, the most efficient display systems realized today.
Autor:
Pavel Pekarski, Arnd Ritz, Gero Heusler, Jens Pollmann-Retsch, Holger Moench, Achim Gerhard Rolf Koerber, Ulrich Hechtfischer
Publikováno v:
SPIE Proceedings.
Projection systems for large screens have made tremendous progress during the last years, both in terms of performance and size reduction. Improved UHP lamp systems made a major contribution to enable the new generation of projectors. The arc gap is
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
Publikováno v:
Journal of Applied Physics. 111:073305
We study the stability of the energy balance of the electron gas in very high–pressure plasmas against longitudinal perturbations, using a local dispersion analysis. After deriving a dispersion equation, we apply the model to a very high–pressure