发表机构
General Fusion Inc.; UKAEA, Culham Campus（General Fusion公司; 英国原子能管理局库姆园区）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对LM26磁化靶聚变实验，设计了汤姆孙散射诊断，在LMC-12压缩 shot 中测得电子温度为$1090 \rm{eV} \text{（±40）}$，为该装置未来的汤姆孙散射系统提供了设计基础。
AI 中文摘要
LM26是为演示利用收缩的固体锂衬套对等离子体进行压缩加热而建造的磁化靶聚变实验。我们报告了LM26的汤姆孙散射诊断设计，以及LMC-12压缩 shot 的测量结果，其中以高置信度测得电子温度为$1090 \rm{eV} \text{（不确定度为±40）}$。LM26的汤姆孙散射诊断可在压缩期间测量8个时间点和2个空间点的温度。访问限制将设计限制为窄f/30视场，以及散射角<20°的前向散射配置。散射光视场的小立体角在很大程度上被压缩期间密度增加10倍（达到$> 10^{20}\rm{m}^{-3}$）所补偿。在小散射角下测量会显著缩小激光线的汤姆孙光谱展宽，窄光谱（1030-1063 nm）有利于光学元件的设计，并最小化等离子体背景光的噪声。使用专门用于小展宽测量的UKAEA多色仪分析散射光，还给出了LMC-12之前未压缩等离子体的结果，杂散光不是显著误差源。该设计为未来LM26配置的汤姆孙散射系统提供了坚实的设计基础。
英文摘要
LM26 is a magnetized target fusion experiment built to demonstrate compressional heating of a plasma with a collapsing solid lithium liner. We report the design of a Thomson scattering diagnostic for LM26 and measurements from the LMC-12 compression shot where an electron temperature of $1090 \pm 40 \rm{eV}$ was measured with high confidence. The LM26 Thomson scattering diagnostic can measure temperature during compression at 8 times and 2 spatial points. Access limitations restricted the design to narrow f/30 views, and a forward scattering configuration with scattering angles < 20deg. The small solid angle of the scattered light view is largely compensated for by the 10 times increase in the density during compression to $> 10^{20}\rm{m}^{-3}$. Measuring at a small scattering angle significantly narrows the Thomson spectral broadening of the laser line. The narrow spectrum (1030-1063 nm) is advantageous for the design of optical components and to minimize noise from plasma background light. UKAEA polychromators specialized for small broadening measurements were used to analyze the scattered light. Results are also presented for an uncompressed plasma preceding LMC-12. Stray light was not a significant source of error. This design provides a strong design basis for Thomson scattering systems on future LM26 configurations.
