Conceptual design of the tomographic system for simultaneous studying of soft and hard X-ray emission from dense magnetized plasma
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- 作者：J. Bielecki ; jakub.bielecki@ifj.edu.edu" class="auth_mail" title="E-mail the corresponding author ; A. Wó ; jcik-Gargula ; M. Scholz
- 关键词：CCD ; charge coupled device ; FoM ; figure of merit ; FPGA ; field programmable gate array ; GSVD ; Generalized Singular Value Decomposition ; FOV ; field of view ; HXR ; hard X-rays ; IFJ PAN ; Institute of Nuclear Physics of the Polish Academy of Sciences ; PF ; plasma focus ; SXR ; soft X-rays ; RMS ; Root mean square deviation ; XEP ; X-ray emissivity parameters
- 刊名：Fusion Engineering and Design
- 出版年：2016
- 出版时间：15 November 2016
- 年：2016
- 卷：112
- 期：Complete
- 页码：646-655
- 全文大小：1579 K
文摘
The article presents a new approach for investigation of spatial distributions of soft and hard X-rays emitted from dense magnetized plasma. The approach is based on the application of tomographic methods to the X-ray emission reconstruction in a plasma focus (PF) device. Quantitative investigation of the anisotropy of the reconstructed X–ray plasma emissivity may help to explain the nature of fusion reaction mechanisms in a PF device. The aim of this work is to present a conceptual design of a novel dual-energy X-ray emission tomographic system dedicated to the PF-24 plasma focus device. The system, which enables the simultaneous registration of soft and hard X-rays, is composed of three X‐ray pinhole cameras. Each camera is equipped with a pair of 16-element Si photodiode arrays arranged in two layers separated by an aluminum attenuator. The Geant4 code was used to optimize the layout and parameters of the applied detectors. In addition, a method of tomographic reconstruction from a sparse data set provided by the experimental setup has been presented.