Oh Seungtae, Jang Juhyeok, Peterson Byron, Choe Wonho, Hong Suk-Ho
National Fusion Research Institute, 169-148, Gwahak-ro, Yuseong-gu, Daejeon 34133, South Korea.
Department of Physics, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea.
Rev Sci Instrum. 2018 Oct;89(10):10E118. doi: 10.1063/1.5036929.
The infrared imaging video bolometer (IRVB) as a foil bolometry technique can be an alternative solution to the conventional resistive bolometer due to its electro-magnetic immunity and 2D plasma profiles. The plasma profile of the IRVB cannot be directly derived from the foil images due to the difference between the foil pixel number and the plasma pixel number and the line integrated nature of the incident rays on the foil. So, it needs tomography such as the Phillips-Thikhonov algorithm. The projection matrix constructing the foil image from the plasma very directly influences the tomography. So, the projection matrix needs to be constructed precisely. For the technique calculating the precise projection matrix, a forward Monte-Carlo ray-tracing method is proposed here, and this technique can provide the detailed descriptions of the foil image. And it can give enhanced performance in the reconstructions of the plasmas with spatially localized power.
红外成像视频测辐射热计（IRVB）作为一种箔测辐射热技术，由于其电磁抗扰性和二维等离子体轮廓，可成为传统电阻测辐射热计的替代解决方案。由于箔像素数与等离子体像素数之间的差异以及箔上入射光线的线积分性质，IRVB的等离子体轮廓无法直接从箔图像中得出。因此，它需要诸如菲利普斯 - 季霍诺夫算法之类的断层扫描技术。从等离子体构建箔图像的投影矩阵对断层扫描有非常直接的影响。所以，投影矩阵需要精确构建。对于计算精确投影矩阵的技术，本文提出了一种正向蒙特卡罗光线追踪方法，该技术可以提供箔图像的详细描述。并且它在空间局部功率等离子体的重建中可以提供增强的性能。
