André Torres
"Cork drawer of the bottles of the ocean"
Abstract
The magnetic diagnostic system delivers fundamental data to the operation and physics exploitation of magnetic confinement nuclear fusion devices. Whilst under continuous improvement since the first devices, the construction of new reactors poses an opportunity for advancements in magnetic diagnostics, tailored to their specific challenges and opportunities.
The COMPASS-U tokamak, being developed in Prague, Czech Republic will have a unique set of parameters, featuring a 5 T toroidal magnetic field and metallic first wall heated to high temperatures. Enabled by an extensive set of diagnostics, this device will be able to support ITER operation and address DEMO and power plant relevant challenges.
In this thesis, the challenges of magnetic diagnostic development for such a unique machine are addressed, and the design and development of key subsystems is shown – from sensors to cabling and electronics. Methods for precise calibration and measurement of magnetic sensor are developed; mitigation of the influence of metallic structures in sensors are studied; conclusions towards the choice of long data-transmission cables are drawn; and the implementation of a real-time numerical integration methods are qualified and new hardware developed.
While these development steps have the ultimate goal of adequacy to the COMPASS-U operation and scientific program, the systematic approaches carried out and described can be applied future devices.
Key-words
Nuclear fusion, tokamak, magnetic diagnostic, magnetic sensors, data-acquisition
Final classification
Pass With Distinction and Honour
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