研究目的
To describe the delivery, testing, installation, and commissioning of the SPIDER Beam Source, the first prototype of a full-scale ion source for the ITER Heating Neutral Beam injector, including addressing technical issues and ensuring readiness for operation.
研究成果
The SPIDER Beam Source was successfully delivered, tested, installed, and commissioned, overcoming various technical challenges. It is now ready for operation, marking a significant milestone for the ITER Neutral Beam Test Facility, with ongoing efforts to address remaining issues in future maintenance phases.
研究不足
Technical constraints included issues with piping quality, oxidation on molybdenum surfaces, leaks in hydraulic circuits, and electrical discharges, which required repairs and optimizations. Application constraints involve the complexity of the system, tight spaces for connections, and the need for future improvements during shutdowns, such as replacing faulty grid segments and correcting magnet orientations.
1：Experimental Design and Method Selection:
The methodology involved procurement, quality control, on-site testing, and installation of the SPIDER Beam Source, with specific tests designed to verify functionality and safety. Theoretical models or algorithms were not explicitly mentioned.
2：Sample Selection and Data Sources:
The sample is the SPIDER Beam Source itself, with data from factory tests, on-site inspections, and measurements during installation and commissioning.
3：List of Experimental Equipment and Materials:
Equipment includes hydraulic circuits, electrical systems, magnetic field mapping tools (e.g., Gaussmeter, 3-axis positioning system), laser tracker, vacuum vessel, Beam Source Handling Tool (BSHT), clean room, and various diagnostic tools (e.g., electrostatic and thermal probes). Materials include stainless steel pipes, molybdenum coatings, and ultrapure water for cooling.
4：Experimental Procedures and Operational Workflow:
Procedures included visual inspections, pressure and leak tests (using He and vacuum methods), electrical insulation and voltage holding tests, magnetic field mapping, grid alignment checks with laser tracker, installation inside the vacuum vessel using BSHT and crane, connection of service lines, and integrated commissioning with RF and high voltage power application.
5：Data Analysis Methods:
Data analysis involved measuring leak rates, electrical parameters, magnetic field profiles, and alignment tolerances, with tools like Residual Gas Analyzer (RGA) for vacuum quality assessment.
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