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P: Plasmaphysik
P 22: Poster: Magnetische Fusion, Plasmadiagnostik, Dichte Plasmen
P 22.24: Poster
Dienstag, 19. März 2002, 17:40–18:40, HZO Foyer
High-speed semiconductor-gas discharge IR-to-visible converter and its application — •S. Matern1, Yu.A. Astrov2, V.M. Marchenko1, L.M. Portsel2, and H.-G. Purwins1 — 1Institute of Applied Physics, Münster University, Germany — 2A.F. Ioffe Physico-Technical Institute, St. Petersburg, Russia
The IR image converter (IRC) is based on a planar semiconductor-gas discharge system which consists of a photosensitive semiconductor cathode and an anode electrode which is transparent in the visible. By choosing semiconductor material and filling gas, as well as by varying pressure of the gas and distance between the electrodes technical specifications of the system can be optimised for a lot of applications. Presently, different cooled systems for wavelength from 1 to 11 µm are available. One of them operates with a compact Stirling cooler, the other uses LN(2) cooling. Typical response time of the systems is in the order of a few microseconds. The IRC has an effective pixel area of 275 × 275 pix(2) and a dynamic range of more than 10(4). The main purpose of the present work is to demonstrate the possibility of effective use of the IRC on some real applications: 1) ultra fast thermal imaging (e.g. monitoring laser welding) and 2) analysing IR laser beams (e.g. erbium and Nd:YAG lasers). At that, the IRC is combined either with an ordinary CCD-camera, high-speed CMOS camera, intensified CCD camera (DiCAM 2, PCO) or with a framing streak camera (C4187, Hamamatsu).