Development of a 3-D tomography technique for Large Helical Device bolometry using EMC3-EIRENE grids.

IF 1.3 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
Koyo Munechika, Hiroaki Tsutsui, Byron J Peterson, Kiyofumi Mukai, Gakushi Kawamura, Daihong Zhang, Felix Reimold, Gabriele Partesotti
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引用次数: 0

Abstract

A three-dimensional (3-D) tomography technique is developed for the bolometry system in the Large Helical Device using the EMC3-EIRENE-defined mesh coordinates and the relative gradient smoothing extended to 3-D space. We utilize two types of bolometers, resistive bolometers and infra-red imaging video bolometers, to cover areas that are not visible with only one type of bolometer, the total channels of which are 1088. Although the resolution of the reconstructed solution rises to 59 400 voxels, we prove that the physically meaningful solution having little negative power is obtained by calculating geometry matrices with the tetrahedralization method and assessing the phantom emission and the synthetic data. Moreover, comparing solutions generated by conventional minimum Fisher regularization and 3-D extended relative gradient smoothing enables us to find that the latter provides a better solution.

基于EMC3-EIRENE网格的大型螺旋装置热测量三维断层扫描技术的发展。
利用emc3 - eree定义的网格坐标和扩展到三维空间的相对梯度平滑,建立了大型螺旋装置测热系统的三维层析成像技术。我们利用两种类型的辐射热计,电阻式辐射热计和红外成像视频辐射热计,覆盖仅使用一种辐射热计无法看到的区域,其总通道为1088个。虽然重构解的分辨率提高到59 400体素,但我们通过四面体化方法计算几何矩阵,并评估幻体发射和合成数据,证明了得到的解具有很小的负幂,具有物理意义。此外,对比传统最小Fisher正则化和三维扩展相对梯度平滑生成的解,我们发现后者提供了更好的解。
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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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