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In LHD, an ECH system for fusion-relevant plasma heating has been greatly progressed with the development of megawatt gyrotrons. Net power of 3.7 MW could be injected into LHD. For stable operation, a new position and profile monitor of the mmw-beams in evacuated transmission lines is developed.
A new method is proposed to analyze mode contents of high power electromagnetic waves that are propagating through corrugated waveguides in the electron cyclotron resonance heating (ECH) system for nuclear fusion devices. The method was applied to a 168 GHz transmission line of the ECH system in Large Helical Device (LHD) to evaluate the waveguide misalignment. Mode contents of the propagating wave...
Polysilane 1 times 3 optical switch circuits were fabricated based on the thermo-optic effect. The waveguide insertion losses were less than -3.1 dB. Optical switch was performed with supplied power of 100 mW or less. Crosstalk attenuation was measured as less than 8.95 dB [1], [2], [3].
Effects of blending alkylbenzenes in a paraffinic base transformer oil were extensively investigated, paying particular attention to their influence upon its heat-stability. Oxidation stability tests of the oil specimens, tube aging tests of Kraft paper/oil electrical insulation systems for oil-filled transformer use and accelerated aging tests of the distribution transformers consisting mainly of...
Three thermally stimulated current peaks were found at 35, 45 and 60°C in low density polyethylene film above room temperature, and the experiment on elongated samples showed that the second peak at 45°C was increased for draw ratios up to 200% and decreased for draw ratio over 200%. The temperatures of the three peaks and the heights at 35°C and 60°C were not affected by elongation. One of the possibilities...
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