研究目的
To estimate the beam power lost through reionization and shine-through mechanisms in Neutral Beam heated plasmas using thermographic analysis of the beam-wall interaction areas.
研究成果
The upgraded IR diagnostic system has been successfully installed and commissioned at the TJ-II stellarator, providing valuable thermographic data for the study of beam power deposition on different targets. The system's improved optical design and increased window size have enhanced the quality of the IR images, enabling more accurate temperature measurements and power loss estimations.
研究不足
The study is limited by the spatial and temporal resolution of the IR camera, the size of the IR window, and the optical conditions within the TJ-II vacuum vessel.
1：Experimental Design and Method Selection:
The study involved the installation of an upgraded infrared imaging system at the TJ-II stellarator for diagnosing the Neutral Beam Injection heating. The optical design was optimized using the ZEMAX optical simulation code.
2：Sample Selection and Data Sources:
Three different Regions of Interest inside the TJ-II vacuum vessel were identified for thermographic analysis.
3：List of Experimental Equipment and Materials:
The system includes an IR camera (model X6580sc by FLIR Systems AB), an IR window (BaF2 crystal), and an IR mirror (fused silica plate with a thin gold coating).
4：Experimental Procedures and Operational Workflow:
The IR camera was used to capture thermographic data of the regions of interest during the TJ-II experimental campaign.
5：Data Analysis Methods:
The thermographic data was analyzed to estimate the beam power lost through reionization and shine-through mechanisms.
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