Reconstruction of soft x-ray emission in MAST Upgrade.

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Review of Scientific Instruments Pub Date : 2024-12-01 DOI:10.1063/5.0219168

B A Steward, M Cecconello, C Bowman

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引用次数: 0

Abstract

Understanding the confinement of fast ions is crucial for plasma heating and non-inductive current drive, i.e., for the operation of a fusion reactor. Interactions between fast ions and magnetohydrodynamic instabilities can reduce the performance of fusion reactions. Measuring the spatial shape and amplitude is crucial for constraining numerical modeling of the interaction between fast ions and these instabilities. Soft x rays can be used to study these magnetic instabilities. In particular, SXR tomography is used to reconstruct the two-dimensional profile of the SXR emissivity requiring only line integrated measurements, thus providing the spatial structure of the instabilities. This work presents SXR tomography reconstruction performed on synthetic SXR emissions from the Mega Ampere Spherical Tokamak Upgrade device. The synthetic SXR emissions are derived from time dependent tokamak transport data analysis code (TRANSP/NUBEAM) simulations. Different tomographic reconstruction models are compared, and the effect of two additional fans of intersecting lines of sight on the reconstructions' performances is investigated. The additional intersecting lines of sight greatly improve the accuracy of the reconstructions.

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来源期刊

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.