Thermal Modelling of Edge-Cooled Single Disc Gyrotron Windows Using a One-Dimensional Finite Difference Computer Code |
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Authors: | V. V. P. Singh A. Arnold E. Borie O. Braz M. Thumm |
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Affiliation: | (1) Central Electronics Engineering Research Institute, Microwave Tube Area, Pilani, 333031, India;(2) Association EURATOM-FZK, Forschungszentrum Karlsruhe (FZK) ITP, Postfach 3640, D-76021 Karlsruhe, Germany;(3) Institut für Höchstfrequenztechnik und Elektronik, Universität Karlsruhe, Kaiserstr. 12, D-76128 Karlsruhe, Germany |
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Abstract: | A one - dimensional finite - difference computer code has been developed and shown to be quite effective in thermal design and analysis of various plane edge-cooled single - disc windows for gyrotrons with Gaussian rf beam output. The program has a modular structure and is flexible enough to suit specific requirements of users; it can handle nonlinearity. Results obtained for various CVD diamond window cases compare well with the experiment and with the results obtained using ABACUS, a well-established 3-D Finite Element code. Results indicate that a CVD diamond disc with 94 mm diameter and edge cooled by water at 293 K will ensure the passage of 1 MW CW at 140 GHz. A fused quartz window, with 60 mm diamter and operating at 165 GHZ on a 1.5 MW pulsed coaxial gyrotron has also been analysed for its transient characteristics and results are presented. |
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Keywords: | Gyrotron output window CVD diamond thermal analysis |
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