On frequency-independent horn antenna design for plasma positioning reflectometers, from simulation to prototype testing
نویسندگان
چکیده
Using a new framework for horn antenna optimization, first frequency-independent plasma positioning reflectometer (PPR) is designed. This hardware optimization approach aiming on lowering the computational complexity of PPR interpretative models able to extract profiles and fluctuations electron density temperature from reflectometry measurements. measurements are strong candidate provide real-time feedback position control in long-discharge fusion tokamaks such as ITER DEMO, which requires fast models. Reducing these therefore critical. In this paper, ray tracing simulations poloidal plane used compare different radiation patterns evaluate them multiple performance criteria. An shape leading far-field diagram found with PROFUSION optimizer prototype tested against an unoptimized conical reference antenna. The criteria indicate that fundamental Gaussian antennas perform well, albeit general worse than same-sized frequency-dependent antennas. Furthermore, it seen pyramidal gap 6 performs well given spatial constraints more performant could be used, when space was available. testing reveals challenges obtaining frequencyindependent characteristics within tokamak blanket environment, additionally complicated by misalignment risks.
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ژورنال
عنوان ژورنال: Journal of Instrumentation
سال: 2021
ISSN: ['1748-0221']
DOI: https://doi.org/10.1088/1748-0221/16/07/p07040