Abstract: The bolometer diagnosis on magnetic confinement fusion device mainly measures the total radiation power and radiation power density distribution of plasma, which is of great significance for studying the plasma operation process such as energy balance, confinement and transport. In this paper, a set of bolometer thermal electronics system is designed for metal film resistance bolometer detector. The system is mainly composed of front-end electronic circuit board and ARM embedded main control part. Among them, the electronics part is divided into three modules according to the function: carrier signal generation, amplitude modulation signal processing, synchronous demodulation and filtering, and the design and function verification.Compared with the traditional bolometer, it improves the integration, can realize multi-channel data acquisition in a limited space, and enhances the convenience and reliability of use. Experiments show that the overall response time of the electronic system and the detector is about 180 ms, the linear correlation coefficient R of the electronic system is 0.99993, and the linearity of the system is good. The response trend of the system to radiant heat is basically the same as that of the original system, which shows the rationality of the system design and lays an important foundation for subsequent improvement.

Key words: Nuclear fusion, Bolometer, Amplifier, Electronic system, EAST

摘要： 磁约束聚变装置上的辐射量热诊断主要实现对等离子体总辐射功率和辐射功率密度分布的测量，对于研究等离子体运行过程如能量平衡、约束与输运等具有重要意义。针对金属膜电阻辐射热探测器设计了 1 套辐射量热电子学系统。该系统主要由前端电子学电路板及 ARM 嵌入式主控部分组成，其中电子学部分按功能分为载波信号发生、调幅信号处理和同步解调及滤波 3 个模块进行设计和功能验证。与传统 Bolometer 相比提高了集成度，该系统可以在有限的空间内实现多通道数据采集，提升了使用便捷性与可靠性。实验表明该电子学系统与探测器整体的响应时间为 180 ms 左右，电子学系统的线性相关系数 R 平方为 0.99993，系统线性度良好，并在 EAST 装置上验证了该系统对于辐射热的响应变化趋势与原系统基本保持一致，说明了本套系统设计的合理性，也为后续改进奠定了重要基础。

关键词: 核聚变, Bolometer, 放大器, 电子学系统, EAST