旋转反射镜用于EBW发射磁场的快速角扫描
A Spinning Mirror for Fast Angular Scans of EBW Emission for Magnetic Pitch Profile Measurement
摘要：
倾斜的旋转反射镜快速地控制了巨型磁球托卡马克（MAST）上电子伯恩斯坦波（EBW）辐射计的视线。为了在高达12，000 rpm的转速下抵抗高机械应力并避免涡流感应磁制动，该反射镜由玻璃增强尼龙基板组成，该基板具有特殊的自平衡设计，并涂有反射层。通过每2.5- 10 ms完成一次角扫描，它允许人们以良好的时间分辨率表征作为视角的函数的伯恩斯坦-非常-普通模式转换效率。转换效率的角度图与普通模式的截止层处的磁螺距角直接相关。因此，在各种频率下的测量提供了等离子体边缘处的安全系数分布。诊断的可行性的初步测量和迹象。此外，角扫描指示电子束焊接加热的最佳发射条件。
英文摘要：
A tilted spinning mirror rapidly steers the line of sight of the electron Bernstein wave (EBW) emission radiometer at the Mega Amp Spherical Tokamak (MAST). In order to resist high mechanical stresses at rotation speeds of up to 12,000 rpm and to avoid eddy current induced magnetic braking, the mirror consists of a glass-reinforced nylon substrate of a special self-balanced design, coated with a reflecting layer. By completing an angular scan every 2.5-10ms, it allows one to characterize with good time resolution the Bernstein-extraordinary-ordinary mode-conversion efficiency as a function of the view angles. Angular maps of conversion efficiency are directly related to the magnetic pitch angle at the cutoff layer for the ordinary mode. Hence, measurements at various frequencies provide the safety factor profile at the plasma edge. Initial measurements and indications of the feasibility of the diagnostic are presented. Moreover, angular scans indicate the best launch conditions for EBW heating.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
