Harryman D M, Colgan C, Lovell J, Moscheni M, Naylor G, Rengle A, Sertoli M, Sladkomedova A, Thwaites R
Tokamak Energy Ltd, Abingdon OX14 4SD, United Kingdom.
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Rev Sci Instrum. 2024 Aug 1;95(8). doi: 10.1063/5.0214400.
Following successful campaigns on the compact high field spherical tokamak ST40, resistive gold foil bolometers have now been installed to measure the radiated power profile. Positioned on the midplane, two bolometer cameras offer perspectives of the horizontal and vertical planes, while the third camera, situated above the midplane, provides a vertical view of the top divertor plates, including the X-point and the strike points. These cameras use a commercial off-the-shelf data acquisition platform with modules specifically designed for bolometers in a Wheatstone bridge configuration, providing both phase sensitive detection and in situ calibration. This paper presents an overview of the design and functionality of all three cameras and the commissioning of the horizontal plane camera. The commissioning of the horizontal camera shows data from a range of plasma pulses, presenting a positive correlation between the relative profiles measured from the bolometer camera and an absolute extreme ultraviolet diode camera viewing along similar lines of sight.
在紧凑型高场球形托卡马克ST40上的成功实验之后，现在已安装了电阻式金箔测辐射热计来测量辐射功率分布。两个测辐射热计摄像头位于中平面，可提供水平和垂直平面的视角，而第三个摄像头位于中平面上方，可提供顶部偏滤器板的垂直视图，包括X点和打击点。这些摄像头使用商用现货数据采集平台，其模块专为惠斯通电桥配置的测辐射热计设计，可提供相敏检测和原位校准。本文概述了所有三个摄像头的设计和功能以及水平平面摄像头的调试情况。水平摄像头的调试展示了一系列等离子体脉冲的数据，表明从测辐射热计摄像头测量的相对分布与沿相似视线方向的绝对极紫外二极管摄像头测量结果之间存在正相关。
