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双色二氧化碳激光长距离干扰测量与长时间稳定在JT-60SA

H Sasao¹, Y Ohtani¹, S Chiba¹

¹National Institutes for Quantum Science and Technology, 801-1 Mukoyama, Nakai, Ibaraki 311-0193, Japan.

The Review of scientific instruments

|April 7, 2025

概括

为JT-60SA托卡马克开发了一种新的双色二氧化碳激光干扰仪,可以在11小时内实现稳定的等离子体测量. 该系统能够精确地确定电子密度,这对于核聚变能源研究至关重要.

科学领域:

等离子体物理学的物理学
核聚变能源工程核聚变能源工程
光学诊断器的光学诊断系统

背景情况:

精确测量等离子体属性对于融合能源研究至关重要.
像JT-60SA这样的托卡马克设备需要先进的诊断工具来操作控制和理解.
长期稳定性和精确的光束对齐是等离子体干涉测量的关键挑战.

研究的目的:

开发和实施一个强大的双色二氧化碳激光干扰仪用于JT-60SA托卡马克.
为了实现长时间稳定和精确的光束轴控制等离子体诊断.
用于高分辨率测量JT-60SA等离子体中的线集成电子密度.

主要方法:

开发一种双色二氧化碳激光干扰仪系统.
为长输电线路 (214米) 实施一种新的光束轴稳定系统.
在等离子体内长时间 (11小时以上) 稳定激光束路径.

主要成果:

激光束线向等离子体成功稳定超过11小时.
证明了直线集成电子密度的测量,分辨率为2 × 10^19 m^-2.
实现了1.4 × 10^20 m^-2.2的典型直线集成电子密度.

结论:

开发的干扰仪为测量JT-60SA中的电子密度提供了稳定可靠的方法.
该系统确保在集成调试期间没有光束线损失,验证其性能.
实验结果突出了补偿电子密度错误的持续挑战,即使使用先进的干扰计.

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