Extraction Processing

Download Advances in Microwave and Radio Frequency Processing : by M. Willert-Porada PDF

By M. Willert-Porada

This publication is meant to supply non-specialists an outline of the cutting-edge in microwave and excessive frequency undefined, size, and modelling in addition to to provide the experts perception into the main complex R&D subject matters of microwave and excessive frequency diverse disciplines. It offers not just with the applying of radiation of three hundred MHz to three hundred GHz frequency to synthesis, heating or ionisation of subject but additionally with iteration, transmission, and detection of microwave and radio frequency radiation. the themes have been chosen from contributions of the eighth foreign convention on Microwave and excessive Frequency Heating, organised by means of AMPERE and held in September 2001 in Bayreuth, Germany. The papers have been referred through significant experts within the respective box.

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Extra resources for Advances in Microwave and Radio Frequency Processing : Report from the 8th International Conference on Microwave and High-Frequency Heating held in Bayreuth, Germany, September 3-7, 2001

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From this results, it is possible to extract some very simple guidelines to design corrugated chokes. First of all, the material to be processed determines the dimensions of the open port. Once these dimensions have been fixed, and taking into account the dielectric properties of the load, it must be identified the set of modes propagating within such a structure. Then, l, namely, the number of rectangular post per section, should be chosen as close as possible to O0/2 (60 mm). This parameter usually gives an indication the slope of the response at lower frequencies.

The gyrotron system features new application-driven capabilities. Both volumetric heating by uniformly distributed microwave energy and surface heating with a focused wave beam of high intensity can be performed in its applicator. This enhanced capability is achieved by the alternative use of changeable mirrors for directing microwaves to the volume of applicator. To perform surface heating of samples (Fig. 3a), the focusing mirror is installed that concentrates microwave power in the spot with size of about (2O)2 located in the central region of applicator.

An alumina-based ceramic insulator sintered in a gyrotron system. For comparison an unsintered specimen is shown on the right The specimen was sintered at a temperature of 1580qC with a 10 min soak time. No distortion of shape was observed in the sintered specimen. Shown in Fig. 5 is a control system screen display at the end of sintering of high pure alumina disk 50 mm in diameter. It should be noted that, despite high pure alumina has very low microwave absorption, the maximal power at sintering did not exceed one kilowatt.

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