Inverse rendering of fusion plasmas: inferring plasma composition from imaging systems
File(s)
Published version
Author(s)
Öztürk, E
Akers, R
Pamela, S
Peers, P
Ghosh, A
Type
Journal Article
Abstract
In this work, we develop a differentiable rendering pipeline for visualising plasma emission within tokamaks, and estimating the gradients of the emission and estimating other physical quantities. Unlike prior work, we are able to leverage arbitrary representations of plasma quantities and easily incorporate them into a non-linear optimisation framework. The efficiency of our method enables not only estimation of a physically plausible image of plasma, but also recovery of the neutral Deuterium distribution from imaging and midplane measurements alone. We demonstrate our method with three different levels of complexity showing first that a poloidal neutrals density distribution can be recovered from imaging alone, second that the distributions of neutral Deuterium, electron density and electron temperature can be recovered jointly, and finally, that this can be done in the presence of realistic imaging systems that incorporate sensor cropping and quantisation.
Date Issued
2025-02-01
Date Acceptance
2024-12-05
Citation
Nuclear Fusion, 2025, 65 (2)
ISSN
0029-5515
Publisher
IOP Publishing
Journal / Book Title
Nuclear Fusion
Volume
65
Issue
2
Copyright Statement
© 2025 Crown copyright, UK Atomic Energy Authority & The Author(s). Published by IOP Publishing Ltd on behalf of the IAEAOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
License URL
Identifier
10.1088/1741-4326/ad9ab5
Subjects
inverse rendering
path tracing
plasma reconstruction
Publication Status
Published
Article Number
026020
Date Publish Online
2025-01-06