Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
United Kingdom Atomic Energy Authority, Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom.
Rev Sci Instrum. 2023 Feb 1;94(2):023509. doi: 10.1063/5.0128750.
A suite of multi-channel resistive bolometers has been implemented to measure the total radiation from Mega Amp Spherical Tokamak Upgrade plasmas, with cameras covering the core plasma and lower divertor chamber. Data are digitized and processed using novel field-programmable gate array-based electronics, offering improved compactness and new operational capabilities. A synthetic diagnostic has been developed to explore the quality of 2D reconstructions available from the system and to quantify the uncertainty on quantities such as the total radiated power. Measurements in the first campaign have demonstrated correct functioning of the diagnostic while also highlighting issues with electrical noise and some failure mechanisms of the detectors, as well as significant neutral beam fast-particle losses.
已经实现了一套多通道电阻测辐射热仪套件，用于测量 Mega Amp 球形托卡马克升级等离子体的总辐射，相机覆盖核心等离子体和下部偏滤器室。数据使用新型现场可编程门阵列（FPGA）为基础的电子设备进行数字化和处理，提供了改进的紧凑性和新的操作功能。已经开发了一种综合诊断方法来探索系统提供的 2D 重建质量，并量化总辐射功率等数量的不确定性。首次运行中的测量表明诊断功能正常，但也突出了电噪声问题和探测器的一些失效机制，以及中性束快粒子的大量损失。
